Google Git
Sign in
android / platform / frameworks / base / a0d3d3200010371f371da4ec18f7d0d814f646ee / . / services / core / java / com / android / server / am / ActivityStack.java
blob: c3a344f5d7f603014a2d69d6b5993ed080e2c673 [file] [log] [blame]
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.am;
import static com.android.server.am.ActivityManagerService.TAG;
import static com.android.server.am.ActivityManagerService.localLOGV;
import static com.android.server.am.ActivityManagerService.DEBUG_CLEANUP;
import static com.android.server.am.ActivityManagerService.DEBUG_CONFIGURATION;
import static com.android.server.am.ActivityManagerService.DEBUG_PAUSE;
import static com.android.server.am.ActivityManagerService.DEBUG_RESULTS;
import static com.android.server.am.ActivityManagerService.DEBUG_STACK;
import static com.android.server.am.ActivityManagerService.DEBUG_SWITCH;
import static com.android.server.am.ActivityManagerService.DEBUG_TASKS;
import static com.android.server.am.ActivityManagerService.DEBUG_TRANSITION;
import static com.android.server.am.ActivityManagerService.DEBUG_USER_LEAVING;
import static com.android.server.am.ActivityManagerService.DEBUG_VISBILITY;
import static com.android.server.am.ActivityManagerService.VALIDATE_TOKENS;
import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE;
import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE;
import static com.android.server.am.ActivityStackSupervisor.DEBUG_ADD_REMOVE;
import static com.android.server.am.ActivityStackSupervisor.DEBUG_APP;
import static com.android.server.am.ActivityStackSupervisor.DEBUG_CONTAINERS;
import static com.android.server.am.ActivityStackSupervisor.DEBUG_RELEASE;
import static com.android.server.am.ActivityStackSupervisor.DEBUG_SAVED_STATE;
import static com.android.server.am.ActivityStackSupervisor.DEBUG_SCREENSHOTS;
import static com.android.server.am.ActivityStackSupervisor.DEBUG_STATES;
import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID;
import android.util.ArraySet;
import com.android.internal.app.IVoiceInteractor;
import com.android.internal.content.ReferrerIntent;
import com.android.internal.os.BatteryStatsImpl;
import com.android.server.Watchdog;
import com.android.server.am.ActivityManagerService.ItemMatcher;
import com.android.server.am.ActivityStackSupervisor.ActivityContainer;
import com.android.server.wm.AppTransition;
import com.android.server.wm.TaskGroup;
import com.android.server.wm.WindowManagerService;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityOptions;
import android.app.AppGlobals;
import android.app.IActivityController;
import android.app.ResultInfo;
import android.app.ActivityManager.RunningTaskInfo;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Binder;
import android.os.Bundle;
import android.os.Debug;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.PersistableBundle;
import android.os.RemoteException;
import android.os.SystemClock;
import android.os.Trace;
import android.os.UserHandle;
import android.service.voice.IVoiceInteractionSession;
import android.util.EventLog;
import android.util.Slog;
import android.view.Display;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Objects;
/**
* State and management of a single stack of activities.
*/
final class ActivityStack {
// Ticks during which we check progress while waiting for an app to launch.
static final int LAUNCH_TICK = 500;
// How long we wait until giving up on the last activity to pause. This
// is short because it directly impacts the responsiveness of starting the
// next activity.
static final int PAUSE_TIMEOUT = 500;
// How long we wait for the activity to tell us it has stopped before
// giving up. This is a good amount of time because we really need this
// from the application in order to get its saved state.
static final int STOP_TIMEOUT = 10*1000;
// How long we wait until giving up on an activity telling us it has
// finished destroying itself.
static final int DESTROY_TIMEOUT = 10*1000;
// How long until we reset a task when the user returns to it. Currently
// disabled.
static final long ACTIVITY_INACTIVE_RESET_TIME = 0;
// How long between activity launches that we consider safe to not warn
// the user about an unexpected activity being launched on top.
static final long START_WARN_TIME = 5*1000;
// Set to false to disable the preview that is shown while a new activity
// is being started.
static final boolean SHOW_APP_STARTING_PREVIEW = true;
// How long to wait for all background Activities to redraw following a call to
// convertToTranslucent().
static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000;
static final boolean SCREENSHOT_FORCE_565 = ActivityManager.isLowRamDeviceStatic();
enum ActivityState {
INITIALIZING,
RESUMED,
PAUSING,
PAUSED,
STOPPING,
STOPPED,
FINISHING,
DESTROYING,
DESTROYED
}
final ActivityManagerService mService;
final WindowManagerService mWindowManager;
/**
* The back history of all previous (and possibly still
* running) activities. It contains #TaskRecord objects.
*/
private ArrayList<TaskRecord> mTaskHistory = new ArrayList<TaskRecord>();
/**
* Used for validating app tokens with window manager.
*/
final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<TaskGroup>();
/**
* List of running activities, sorted by recent usage.
* The first entry in the list is the least recently used.
* It contains HistoryRecord objects.
*/
final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<ActivityRecord>();
/**
* Animations that for the current transition have requested not to
* be considered for the transition animation.
*/
final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<ActivityRecord>();
/**
* When we are in the process of pausing an activity, before starting the
* next one, this variable holds the activity that is currently being paused.
*/
ActivityRecord mPausingActivity = null;
/**
* This is the last activity that we put into the paused state. This is
* used to determine if we need to do an activity transition while sleeping,
* when we normally hold the top activity paused.
*/
ActivityRecord mLastPausedActivity = null;
/**
* Activities that specify No History must be removed once the user navigates away from them.
* If the device goes to sleep with such an activity in the paused state then we save it here
* and finish it later if another activity replaces it on wakeup.
*/
ActivityRecord mLastNoHistoryActivity = null;
/**
* Current activity that is resumed, or null if there is none.
*/
ActivityRecord mResumedActivity = null;
/**
* This is the last activity that has been started. It is only used to
* identify when multiple activities are started at once so that the user
* can be warned they may not be in the activity they think they are.
*/
ActivityRecord mLastStartedActivity = null;
// The topmost Activity passed to convertToTranslucent(). When non-null it means we are
// waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they
// are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the
// Activity in mTranslucentActivityWaiting is notified via
// Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last
// background activity being drawn then the same call will be made with a true value.
ActivityRecord mTranslucentActivityWaiting = null;
private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent =
new ArrayList<ActivityRecord>();
/**
* Set when we know we are going to be calling updateConfiguration()
* soon, so want to skip intermediate config checks.
*/
boolean mConfigWillChange;
long mLaunchStartTime = 0;
long mFullyDrawnStartTime = 0;
int mCurrentUser;
final int mStackId;
final ActivityContainer mActivityContainer;
/** The other stacks, in order, on the attached display. Updated at attach/detach time. */
ArrayList<ActivityStack> mStacks;
/** The attached Display's unique identifier, or -1 if detached */
int mDisplayId;
/** Run all ActivityStacks through this */
final ActivityStackSupervisor mStackSupervisor;
static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1;
static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2;
static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3;
static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4;
static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5;
static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6;
static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG =
ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7;
static class ScheduleDestroyArgs {
final ProcessRecord mOwner;
final String mReason;
ScheduleDestroyArgs(ProcessRecord owner, String reason) {
mOwner = owner;
mReason = reason;
}
}
final Handler mHandler;
final class ActivityStackHandler extends Handler {
//public Handler() {
// if (localLOGV) Slog.v(TAG, "Handler started!");
//}
ActivityStackHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case PAUSE_TIMEOUT_MSG: {
ActivityRecord r = (ActivityRecord)msg.obj;
// We don't at this point know if the activity is fullscreen,
// so we need to be conservative and assume it isn't.
Slog.w(TAG, "Activity pause timeout for " + r);
synchronized (mService) {
if (r.app != null) {
mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r);
}
activityPausedLocked(r.appToken, true);
}
} break;
case LAUNCH_TICK_MSG: {
ActivityRecord r = (ActivityRecord)msg.obj;
synchronized (mService) {
if (r.continueLaunchTickingLocked()) {
mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r);
}
}
} break;
case DESTROY_TIMEOUT_MSG: {
ActivityRecord r = (ActivityRecord)msg.obj;
// We don't at this point know if the activity is fullscreen,
// so we need to be conservative and assume it isn't.
Slog.w(TAG, "Activity destroy timeout for " + r);
synchronized (mService) {
activityDestroyedLocked(r != null ? r.appToken : null);
}
} break;
case STOP_TIMEOUT_MSG: {
ActivityRecord r = (ActivityRecord)msg.obj;
// We don't at this point know if the activity is fullscreen,
// so we need to be conservative and assume it isn't.
Slog.w(TAG, "Activity stop timeout for " + r);
synchronized (mService) {
if (r.isInHistory()) {
activityStoppedLocked(r, null, null, null);
}
}
} break;
case DESTROY_ACTIVITIES_MSG: {
ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj;
synchronized (mService) {
destroyActivitiesLocked(args.mOwner, args.mReason);
}
} break;
case TRANSLUCENT_TIMEOUT_MSG: {
synchronized (mService) {
notifyActivityDrawnLocked(null);
}
} break;
case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: {
synchronized (mService) {
final ActivityRecord r = getVisibleBehindActivity();
Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r);
if (r != null) {
mService.killAppAtUsersRequest(r.app, null);
}
}
} break;
}
}
}
int numActivities() {
int count = 0;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
count += mTaskHistory.get(taskNdx).mActivities.size();
}
return count;
}
ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer) {
mActivityContainer = activityContainer;
mStackSupervisor = activityContainer.getOuter();
mService = mStackSupervisor.mService;
mHandler = new ActivityStackHandler(mService.mHandler.getLooper());
mWindowManager = mService.mWindowManager;
mStackId = activityContainer.mStackId;
mCurrentUser = mService.mCurrentUserId;
}
/**
* Checks whether the userid is a profile of the current user.
*/
private boolean isCurrentProfileLocked(int userId) {
if (userId == mCurrentUser) return true;
for (int i = 0; i < mService.mCurrentProfileIds.length; i++) {
if (mService.mCurrentProfileIds[i] == userId) return true;
}
return false;
}
boolean okToShowLocked(ActivityRecord r) {
return isCurrentProfileLocked(r.userId)
|| (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0;
}
final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(notTop);
if (r != null) {
return r;
}
}
return null;
}
final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = activities.get(activityNdx);
if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) {
return r;
}
}
}
return null;
}
/**
* This is a simplified version of topRunningActivityLocked that provides a number of
* optional skip-over modes. It is intended for use with the ActivityController hook only.
*
* @param token If non-null, any history records matching this token will be skipped.
* @param taskId If non-zero, we'll attempt to skip over records with the same task ID.
*
* @return Returns the HistoryRecord of the next activity on the stack.
*/
final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
TaskRecord task = mTaskHistory.get(taskNdx);
if (task.taskId == taskId) {
continue;
}
ArrayList<ActivityRecord> activities = task.mActivities;
for (int i = activities.size() - 1; i >= 0; --i) {
final ActivityRecord r = activities.get(i);
// Note: the taskId check depends on real taskId fields being non-zero
if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) {
return r;
}
}
}
return null;
}
final ActivityRecord topActivity() {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (!r.finishing) {
return r;
}
}
}
return null;
}
final TaskRecord topTask() {
final int size = mTaskHistory.size();
if (size > 0) {
return mTaskHistory.get(size - 1);
}
return null;
}
TaskRecord taskForIdLocked(int id) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.taskId == id) {
return task;
}
}
return null;
}
ActivityRecord isInStackLocked(IBinder token) {
final ActivityRecord r = ActivityRecord.forToken(token);
if (r != null) {
final TaskRecord task = r.task;
if (task != null && task.mActivities.contains(r) && mTaskHistory.contains(task)) {
if (task.stack != this) Slog.w(TAG,
"Illegal state! task does not point to stack it is in.");
return r;
}
}
return null;
}
final boolean updateLRUListLocked(ActivityRecord r) {
final boolean hadit = mLRUActivities.remove(r);
mLRUActivities.add(r);
return hadit;
}
final boolean isHomeStack() {
return mStackId == HOME_STACK_ID;
}
final boolean isOnHomeDisplay() {
return isAttached() &&
mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY;
}
final void moveToFront() {
if (isAttached()) {
if (isOnHomeDisplay()) {
mStackSupervisor.moveHomeStack(isHomeStack());
}
mStacks.remove(this);
mStacks.add(this);
final TaskRecord task = topTask();
if (task != null) {
mWindowManager.moveTaskToTop(task.taskId);
}
}
}
final boolean isAttached() {
return mStacks != null;
}
/**
* Returns the top activity in any existing task matching the given
* Intent. Returns null if no such task is found.
*/
ActivityRecord findTaskLocked(ActivityRecord target) {
Intent intent = target.intent;
ActivityInfo info = target.info;
ComponentName cls = intent.getComponent();
if (info.targetActivity != null) {
cls = new ComponentName(info.packageName, info.targetActivity);
}
final int userId = UserHandle.getUserId(info.applicationInfo.uid);
boolean isDocument = intent != null & intent.isDocument();
// If documentData is non-null then it must match the existing task data.
Uri documentData = isDocument ? intent.getData() : null;
if (DEBUG_TASKS) Slog.d(TAG, "Looking for task of " + target + " in " + this);
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.voiceSession != null) {
// We never match voice sessions; those always run independently.
if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": voice session");
continue;
}
if (task.userId != userId) {
// Looking for a different task.
if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": different user");
continue;
}
final ActivityRecord r = task.getTopActivity();
if (r == null || r.finishing || r.userId != userId ||
r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) {
if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": mismatch root " + r);
continue;
}
final Intent taskIntent = task.intent;
final Intent affinityIntent = task.affinityIntent;
final boolean taskIsDocument;
final Uri taskDocumentData;
if (taskIntent != null && taskIntent.isDocument()) {
taskIsDocument = true;
taskDocumentData = taskIntent.getData();
} else if (affinityIntent != null && affinityIntent.isDocument()) {
taskIsDocument = true;
taskDocumentData = affinityIntent.getData();
} else {
taskIsDocument = false;
taskDocumentData = null;
}
if (DEBUG_TASKS) Slog.d(TAG, "Comparing existing cls="
+ taskIntent.getComponent().flattenToShortString()
+ "/aff=" + r.task.rootAffinity + " to new cls="
+ intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity);
if (!isDocument && !taskIsDocument && task.rootAffinity != null) {
if (task.rootAffinity.equals(target.taskAffinity)) {
if (DEBUG_TASKS) Slog.d(TAG, "Found matching affinity!");
return r;
}
} else if (taskIntent != null && taskIntent.getComponent() != null &&
taskIntent.getComponent().compareTo(cls) == 0 &&
Objects.equals(documentData, taskDocumentData)) {
if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!");
//dump();
if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: "
+ r.intent);
return r;
} else if (affinityIntent != null && affinityIntent.getComponent() != null &&
affinityIntent.getComponent().compareTo(cls) == 0 &&
Objects.equals(documentData, taskDocumentData)) {
if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!");
//dump();
if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: "
+ r.intent);
return r;
} else if (DEBUG_TASKS) {
Slog.d(TAG, "Not a match: " + task);
}
}
return null;
}
/**
* Returns the first activity (starting from the top of the stack) that
* is the same as the given activity. Returns null if no such activity
* is found.
*/
ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) {
ComponentName cls = intent.getComponent();
if (info.targetActivity != null) {
cls = new ComponentName(info.packageName, info.targetActivity);
}
final int userId = UserHandle.getUserId(info.applicationInfo.uid);
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
TaskRecord task = mTaskHistory.get(taskNdx);
if (!isCurrentProfileLocked(task.userId)) {
return null;
}
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = activities.get(activityNdx);
if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) {
//Slog.i(TAG, "Found matching class!");
//dump();
//Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent);
return r;
}
}
}
return null;
}
/*
* Move the activities around in the stack to bring a user to the foreground.
*/
final void switchUserLocked(int userId) {
if (mCurrentUser == userId) {
return;
}
mCurrentUser = userId;
// Move userId's tasks to the top.
int index = mTaskHistory.size();
for (int i = 0; i < index; ) {
TaskRecord task = mTaskHistory.get(i);
if (isCurrentProfileLocked(task.userId)) {
if (DEBUG_TASKS) Slog.d(TAG, "switchUserLocked: stack=" + getStackId() +
" moving " + task + " to top");
mTaskHistory.remove(i);
mTaskHistory.add(task);
--index;
// Use same value for i.
} else {
++i;
}
}
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
}
void minimalResumeActivityLocked(ActivityRecord r) {
r.state = ActivityState.RESUMED;
if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r
+ " (starting new instance)");
r.stopped = false;
mResumedActivity = r;
r.task.touchActiveTime();
mService.addRecentTaskLocked(r.task);
completeResumeLocked(r);
mStackSupervisor.checkReadyForSleepLocked();
setLaunchTime(r);
if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle);
}
private void startLaunchTraces() {
if (mFullyDrawnStartTime != 0) {
Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0);
}
Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0);
Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0);
}
private void stopFullyDrawnTraceIfNeeded() {
if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) {
Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0);
mFullyDrawnStartTime = 0;
}
}
void setLaunchTime(ActivityRecord r) {
if (r.displayStartTime == 0) {
r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis();
if (mLaunchStartTime == 0) {
startLaunchTraces();
mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime;
}
} else if (mLaunchStartTime == 0) {
startLaunchTraces();
mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis();
}
}
void clearLaunchTime(ActivityRecord r) {
// Make sure that there is no activity waiting for this to launch.
if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) {
r.displayStartTime = r.fullyDrawnStartTime = 0;
} else {
mStackSupervisor.removeTimeoutsForActivityLocked(r);
mStackSupervisor.scheduleIdleTimeoutLocked(r);
}
}
void awakeFromSleepingLocked() {
// Ensure activities are no longer sleeping.
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
activities.get(activityNdx).setSleeping(false);
}
}
if (mPausingActivity != null) {
Slog.d(TAG, "awakeFromSleepingLocked: previously pausing activity didn't pause");
activityPausedLocked(mPausingActivity.appToken, true);
}
}
/**
* @return true if something must be done before going to sleep.
*/
boolean checkReadyForSleepLocked() {
if (mResumedActivity != null) {
// Still have something resumed; can't sleep until it is paused.
if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity);
if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false");
startPausingLocked(false, true, false, false);
return true;
}
if (mPausingActivity != null) {
// Still waiting for something to pause; can't sleep yet.
if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity);
return true;
}
return false;
}
void goToSleep() {
ensureActivitiesVisibleLocked(null, 0);
// Make sure any stopped but visible activities are now sleeping.
// This ensures that the activity's onStop() is called.
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) {
r.setSleeping(true);
}
}
}
}
public final Bitmap screenshotActivities(ActivityRecord who) {
if (DEBUG_SCREENSHOTS) Slog.d(TAG, "screenshotActivities: " + who);
if (who.noDisplay) {
if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tNo display");
return null;
}
if (isHomeStack()) {
// This is an optimization -- since we never show Home or Recents within Recents itself,
// we can just go ahead and skip taking the screenshot if this is the home stack.
if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tHome stack");
return null;
}
int w = mService.mThumbnailWidth;
int h = mService.mThumbnailHeight;
if (w > 0) {
if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tTaking screenshot");
return mWindowManager.screenshotApplications(who.appToken, Display.DEFAULT_DISPLAY,
w, h, SCREENSHOT_FORCE_565);
}
Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h);
return null;
}
/**
* Start pausing the currently resumed activity. It is an error to call this if there
* is already an activity being paused or there is no resumed activity.
*
* @param userLeaving True if this should result in an onUserLeaving to the current activity.
* @param uiSleeping True if this is happening with the user interface going to sleep (the
* screen turning off).
* @param resuming True if this is being called as part of resuming the top activity, so
* we shouldn't try to instigate a resume here.
* @param dontWait True if the caller does not want to wait for the pause to complete. If
* set to true, we will immediately complete the pause here before returning.
* @return Returns true if an activity now is in the PAUSING state, and we are waiting for
* it to tell us when it is done.
*/
final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming,
boolean dontWait) {
if (mPausingActivity != null) {
Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity);
completePauseLocked(false);
}
ActivityRecord prev = mResumedActivity;
if (prev == null) {
if (!resuming) {
Slog.wtf(TAG, "Trying to pause when nothing is resumed");
mStackSupervisor.resumeTopActivitiesLocked();
}
return false;
}
if (mActivityContainer.mParentActivity == null) {
// Top level stack, not a child. Look for child stacks.
mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait);
}
if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev);
else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev);
mResumedActivity = null;
mPausingActivity = prev;
mLastPausedActivity = prev;
mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0
|| (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null;
prev.state = ActivityState.PAUSING;
prev.task.touchActiveTime();
clearLaunchTime(prev);
final ActivityRecord next = mStackSupervisor.topRunningActivityLocked();
if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) {
prev.updateThumbnailLocked(screenshotActivities(prev), null);
}
stopFullyDrawnTraceIfNeeded();
mService.updateCpuStats();
if (prev.app != null && prev.app.thread != null) {
if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev);
try {
EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY,
prev.userId, System.identityHashCode(prev),
prev.shortComponentName);
mService.updateUsageStats(prev, false);
prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing,
userLeaving, prev.configChangeFlags, dontWait);
} catch (Exception e) {
// Ignore exception, if process died other code will cleanup.
Slog.w(TAG, "Exception thrown during pause", e);
mPausingActivity = null;
mLastPausedActivity = null;
mLastNoHistoryActivity = null;
}
} else {
mPausingActivity = null;
mLastPausedActivity = null;
mLastNoHistoryActivity = null;
}
// If we are not going to sleep, we want to ensure the device is
// awake until the next activity is started.
if (!mService.isSleepingOrShuttingDown()) {
mStackSupervisor.acquireLaunchWakelock();
}
if (mPausingActivity != null) {
// Have the window manager pause its key dispatching until the new
// activity has started. If we're pausing the activity just because
// the screen is being turned off and the UI is sleeping, don't interrupt
// key dispatch; the same activity will pick it up again on wakeup.
if (!uiSleeping) {
prev.pauseKeyDispatchingLocked();
} else {
if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off");
}
if (dontWait) {
// If the caller said they don't want to wait for the pause, then complete
// the pause now.
completePauseLocked(false);
return false;
} else {
// Schedule a pause timeout in case the app doesn't respond.
// We don't give it much time because this directly impacts the
// responsiveness seen by the user.
Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG);
msg.obj = prev;
prev.pauseTime = SystemClock.uptimeMillis();
mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT);
if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete...");
return true;
}
} else {
// This activity failed to schedule the
// pause, so just treat it as being paused now.
if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next.");
if (!resuming) {
mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null);
}
return false;
}
}
final void activityPausedLocked(IBinder token, boolean timeout) {
if (DEBUG_PAUSE) Slog.v(
TAG, "Activity paused: token=" + token + ", timeout=" + timeout);
final ActivityRecord r = isInStackLocked(token);
if (r != null) {
mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r);
if (mPausingActivity == r) {
if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r
+ (timeout ? " (due to timeout)" : " (pause complete)"));
completePauseLocked(true);
} else {
EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE,
r.userId, System.identityHashCode(r), r.shortComponentName,
mPausingActivity != null
? mPausingActivity.shortComponentName : "(none)");
}
}
}
final void activityStoppedLocked(ActivityRecord r, Bundle icicle,
PersistableBundle persistentState, CharSequence description) {
if (r.state != ActivityState.STOPPING) {
Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r);
mHandler.removeMessages(STOP_TIMEOUT_MSG, r);
return;
}
if (persistentState != null) {
r.persistentState = persistentState;
mService.notifyTaskPersisterLocked(r.task, false);
}
if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle);
if (icicle != null) {
// If icicle is null, this is happening due to a timeout, so we
// haven't really saved the state.
r.icicle = icicle;
r.haveState = true;
r.launchCount = 0;
r.updateThumbnailLocked(null, description);
}
if (!r.stopped) {
if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)");
mHandler.removeMessages(STOP_TIMEOUT_MSG, r);
r.stopped = true;
r.state = ActivityState.STOPPED;
if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == r) {
mStackSupervisor.requestVisibleBehindLocked(r, false);
}
if (r.finishing) {
r.clearOptionsLocked();
} else {
if (r.configDestroy) {
destroyActivityLocked(r, true, "stop-config");
mStackSupervisor.resumeTopActivitiesLocked();
} else {
mStackSupervisor.updatePreviousProcessLocked(r);
}
}
}
}
private void completePauseLocked(boolean resumeNext) {
ActivityRecord prev = mPausingActivity;
if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev);
if (prev != null) {
prev.state = ActivityState.PAUSED;
if (prev.finishing) {
if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev);
prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false);
} else if (prev.app != null) {
if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev);
if (prev.waitingVisible) {
prev.waitingVisible = false;
mStackSupervisor.mWaitingVisibleActivities.remove(prev);
if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v(
TAG, "Complete pause, no longer waiting: " + prev);
}
if (prev.configDestroy) {
// The previous is being paused because the configuration
// is changing, which means it is actually stopping...
// To juggle the fact that we are also starting a new
// instance right now, we need to first completely stop
// the current instance before starting the new one.
if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev);
destroyActivityLocked(prev, true, "pause-config");
} else if (!hasVisibleBehindActivity()) {
// If we were visible then resumeTopActivities will release resources before
// stopping.
mStackSupervisor.mStoppingActivities.add(prev);
if (mStackSupervisor.mStoppingActivities.size() > 3 ||
prev.frontOfTask && mTaskHistory.size() <= 1) {
// If we already have a few activities waiting to stop,
// then give up on things going idle and start clearing
// them out. Or if r is the last of activity of the last task the stack
// will be empty and must be cleared immediately.
if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle");
mStackSupervisor.scheduleIdleLocked();
} else {
mStackSupervisor.checkReadyForSleepLocked();
}
}
} else {
if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev);
prev = null;
}
mPausingActivity = null;
}
if (resumeNext) {
final ActivityStack topStack = mStackSupervisor.getFocusedStack();
if (!mService.isSleepingOrShuttingDown()) {
mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null);
} else {
mStackSupervisor.checkReadyForSleepLocked();
ActivityRecord top = topStack.topRunningActivityLocked(null);
if (top == null || (prev != null && top != prev)) {
// If there are no more activities available to run,
// do resume anyway to start something. Also if the top
// activity on the stack is not the just paused activity,
// we need to go ahead and resume it to ensure we complete
// an in-flight app switch.
mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null);
}
}
}
if (prev != null) {
prev.resumeKeyDispatchingLocked();
if (prev.app != null && prev.cpuTimeAtResume > 0
&& mService.mBatteryStatsService.isOnBattery()) {
long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid)
- prev.cpuTimeAtResume;
if (diff > 0) {
BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics();
synchronized (bsi) {
BatteryStatsImpl.Uid.Proc ps =
bsi.getProcessStatsLocked(prev.info.applicationInfo.uid,
prev.info.packageName);
if (ps != null) {
ps.addForegroundTimeLocked(diff);
}
}
}
}
prev.cpuTimeAtResume = 0; // reset it
}
// Notfiy when the task stack has changed
mService.notifyTaskStackChangedLocked();
}
/**
* Once we know that we have asked an application to put an activity in
* the resumed state (either by launching it or explicitly telling it),
* this function updates the rest of our state to match that fact.
*/
private void completeResumeLocked(ActivityRecord next) {
next.idle = false;
next.results = null;
next.newIntents = null;
if (next.isHomeActivity() && next.isNotResolverActivity()) {
ProcessRecord app = next.task.mActivities.get(0).app;
if (app != null && app != mService.mHomeProcess) {
mService.mHomeProcess = app;
}
}
if (next.nowVisible) {
// We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now.
mStackSupervisor.notifyActivityDrawnForKeyguard();
}
// schedule an idle timeout in case the app doesn't do it for us.
mStackSupervisor.scheduleIdleTimeoutLocked(next);
mStackSupervisor.reportResumedActivityLocked(next);
next.resumeKeyDispatchingLocked();
mNoAnimActivities.clear();
// Mark the point when the activity is resuming
// TODO: To be more accurate, the mark should be before the onCreate,
// not after the onResume. But for subsequent starts, onResume is fine.
if (next.app != null) {
next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid);
} else {
next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process
}
next.returningOptions = null;
if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == next) {
// When resuming an activity, require it to call requestVisibleBehind() again.
mActivityContainer.mActivityDisplay.setVisibleBehindActivity(null);
}
}
private void setVisibile(ActivityRecord r, boolean visible) {
r.visible = visible;
mWindowManager.setAppVisibility(r.appToken, visible);
final ArrayList<ActivityContainer> containers = r.mChildContainers;
for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) {
ActivityContainer container = containers.get(containerNdx);
container.setVisible(visible);
}
}
// Find the first visible activity above the passed activity and if it is translucent return it
// otherwise return null;
ActivityRecord findNextTranslucentActivity(ActivityRecord r) {
TaskRecord task = r.task;
if (task == null) {
return null;
}
ActivityStack stack = task.stack;
if (stack == null) {
return null;
}
int stackNdx = mStacks.indexOf(stack);
ArrayList<TaskRecord> tasks = stack.mTaskHistory;
int taskNdx = tasks.indexOf(task);
ArrayList<ActivityRecord> activities = task.mActivities;
int activityNdx = activities.indexOf(r) + 1;
final int numStacks = mStacks.size();
while (stackNdx < numStacks) {
tasks = mStacks.get(stackNdx).mTaskHistory;
final int numTasks = tasks.size();
while (taskNdx < numTasks) {
activities = tasks.get(taskNdx).mActivities;
final int numActivities = activities.size();
while (activityNdx < numActivities) {
final ActivityRecord activity = activities.get(activityNdx);
if (!activity.finishing) {
return activity.fullscreen ? null : activity;
}
++activityNdx;
}
activityNdx = 0;
++taskNdx;
}
taskNdx = 0;
++stackNdx;
}
return null;
}
// Checks if any of the stacks above this one has a fullscreen activity behind it.
// If so, this stack is hidden, otherwise it is visible.
private boolean isStackVisible() {
if (!isAttached()) {
return false;
}
if (mStackSupervisor.isFrontStack(this)) {
return true;
}
/**
* Start at the task above this one and go up, looking for a visible
* fullscreen activity, or a translucent activity that requested the
* wallpaper to be shown behind it.
*/
for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) {
final ArrayList<TaskRecord> tasks = mStacks.get(i).getAllTasks();
for (int taskNdx = 0; taskNdx < tasks.size(); taskNdx++) {
final TaskRecord task = tasks.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = 0; activityNdx < activities.size(); activityNdx++) {
final ActivityRecord r = activities.get(activityNdx);
// Conditions for an activity to obscure the stack we're
// examining:
// 1. Not Finishing AND Visible AND:
// 2. Either:
// - Full Screen Activity OR
// - On top of Home and our stack is NOT home
if (!r.finishing && r.visible && (r.fullscreen ||
(!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) {
return false;
}
}
}
}
return true;
}
/**
* Make sure that all activities that need to be visible (that is, they
* currently can be seen by the user) actually are.
*/
final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) {
ActivityRecord top = topRunningActivityLocked(null);
if (top == null) {
return;
}
if (DEBUG_VISBILITY) Slog.v(
TAG, "ensureActivitiesVisible behind " + top
+ " configChanges=0x" + Integer.toHexString(configChanges));
if (mTranslucentActivityWaiting != top) {
mUndrawnActivitiesBelowTopTranslucent.clear();
if (mTranslucentActivityWaiting != null) {
// Call the callback with a timeout indication.
notifyActivityDrawnLocked(null);
mTranslucentActivityWaiting = null;
}
mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG);
}
// If the top activity is not fullscreen, then we need to
// make sure any activities under it are now visible.
boolean aboveTop = true;
boolean behindFullscreen = !isStackVisible();
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.finishing) {
continue;
}
if (aboveTop && r != top) {
continue;
}
aboveTop = false;
// mLaunchingBehind: Activities launching behind are at the back of the task stack
// but must be drawn initially for the animation as though they were visible.
if (!behindFullscreen || r.mLaunchTaskBehind) {
if (DEBUG_VISBILITY) Slog.v(
TAG, "Make visible? " + r + " finishing=" + r.finishing
+ " state=" + r.state);
// First: if this is not the current activity being started, make
// sure it matches the current configuration.
if (r != starting) {
ensureActivityConfigurationLocked(r, 0);
}
if (r.app == null || r.app.thread == null) {
// This activity needs to be visible, but isn't even
// running... get it started, but don't resume it
// at this point.
if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r);
if (r != starting) {
r.startFreezingScreenLocked(r.app, configChanges);
}
if (!r.visible || r.mLaunchTaskBehind) {
if (DEBUG_VISBILITY) Slog.v(
TAG, "Starting and making visible: " + r);
setVisibile(r, true);
}
if (r != starting) {
mStackSupervisor.startSpecificActivityLocked(r, false, false);
}
} else if (r.visible) {
// If this activity is already visible, then there is nothing
// else to do here.
if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r);
r.stopFreezingScreenLocked(false);
try {
if (r.returningOptions != null) {
r.app.thread.scheduleOnNewActivityOptions(r.appToken,
r.returningOptions);
}
} catch(RemoteException e) {
}
} else {
// This activity is not currently visible, but is running.
// Tell it to become visible.
r.visible = true;
if (r.state != ActivityState.RESUMED && r != starting) {
// If this activity is paused, tell it
// to now show its window.
if (DEBUG_VISBILITY) Slog.v(
TAG, "Making visible and scheduling visibility: " + r);
try {
if (mTranslucentActivityWaiting != null) {
r.updateOptionsLocked(r.returningOptions);
mUndrawnActivitiesBelowTopTranslucent.add(r);
}
setVisibile(r, true);
r.sleeping = false;
r.app.pendingUiClean = true;
r.app.thread.scheduleWindowVisibility(r.appToken, true);
r.stopFreezingScreenLocked(false);
} catch (Exception e) {
// Just skip on any failure; we'll make it
// visible when it next restarts.
Slog.w(TAG, "Exception thrown making visibile: "
+ r.intent.getComponent(), e);
}
}
}
// Aggregate current change flags.
configChanges |= r.configChangeFlags;
if (r.fullscreen) {
// At this point, nothing else needs to be shown
if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r);
behindFullscreen = true;
} else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) {
if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r);
behindFullscreen = true;
}
} else {
if (DEBUG_VISBILITY) Slog.v(
TAG, "Make invisible? " + r + " finishing=" + r.finishing
+ " state=" + r.state
+ " behindFullscreen=" + behindFullscreen);
// Now for any activities that aren't visible to the user, make
// sure they no longer are keeping the screen frozen.
if (r.visible) {
if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r);
try {
setVisibile(r, false);
switch (r.state) {
case STOPPING:
case STOPPED:
if (r.app != null && r.app.thread != null) {
if (DEBUG_VISBILITY) Slog.v(
TAG, "Scheduling invisibility: " + r);
r.app.thread.scheduleWindowVisibility(r.appToken, false);
}
break;
case INITIALIZING:
case RESUMED:
case PAUSING:
case PAUSED:
// This case created for transitioning activities from
// translucent to opaque {@link Activity#convertToOpaque}.
if (getVisibleBehindActivity() == r) {
releaseBackgroundResources();
} else {
if (!mStackSupervisor.mStoppingActivities.contains(r)) {
mStackSupervisor.mStoppingActivities.add(r);
}
mStackSupervisor.scheduleIdleLocked();
}
break;
default:
break;
}
} catch (Exception e) {
// Just skip on any failure; we'll make it
// visible when it next restarts.
Slog.w(TAG, "Exception thrown making hidden: "
+ r.intent.getComponent(), e);
}
} else {
if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r);
}
}
}
}
if (mTranslucentActivityWaiting != null &&
mUndrawnActivitiesBelowTopTranslucent.isEmpty()) {
// Nothing is getting drawn or everything was already visible, don't wait for timeout.
notifyActivityDrawnLocked(null);
}
}
void convertToTranslucent(ActivityRecord r) {
mTranslucentActivityWaiting = r;
mUndrawnActivitiesBelowTopTranslucent.clear();
mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT);
}
/**
* Called as activities below the top translucent activity are redrawn. When the last one is
* redrawn notify the top activity by calling
* {@link Activity#onTranslucentConversionComplete}.
*
* @param r The most recent background activity to be drawn. Or, if r is null then a timeout
* occurred and the activity will be notified immediately.
*/
void notifyActivityDrawnLocked(ActivityRecord r) {
mActivityContainer.setDrawn();
if ((r == null)
|| (mUndrawnActivitiesBelowTopTranslucent.remove(r) &&
mUndrawnActivitiesBelowTopTranslucent.isEmpty())) {
// The last undrawn activity below the top has just been drawn. If there is an
// opaque activity at the top, notify it that it can become translucent safely now.
final ActivityRecord waitingActivity = mTranslucentActivityWaiting;
mTranslucentActivityWaiting = null;
mUndrawnActivitiesBelowTopTranslucent.clear();
mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG);
if (waitingActivity != null) {
mWindowManager.setWindowOpaque(waitingActivity.appToken, false);
if (waitingActivity.app != null && waitingActivity.app.thread != null) {
try {
waitingActivity.app.thread.scheduleTranslucentConversionComplete(
waitingActivity.appToken, r != null);
} catch (RemoteException e) {
}
}
}
}
}
/** If any activities below the top running one are in the INITIALIZING state and they have a
* starting window displayed then remove that starting window. It is possible that the activity
* in this state will never resumed in which case that starting window will be orphaned. */
void cancelInitializingActivities() {
final ActivityRecord topActivity = topRunningActivityLocked(null);
boolean aboveTop = true;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (aboveTop) {
if (r == topActivity) {
aboveTop = false;
}
continue;
}
if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) {
if (DEBUG_VISBILITY) Slog.w(TAG, "Found orphaned starting window " + r);
r.mStartingWindowShown = false;
mWindowManager.removeAppStartingWindow(r.appToken);
}
}
}
}
/**
* Ensure that the top activity in the stack is resumed.
*
* @param prev The previously resumed activity, for when in the process
* of pausing; can be null to call from elsewhere.
*
* @return Returns true if something is being resumed, or false if
* nothing happened.
*/
final boolean resumeTopActivityLocked(ActivityRecord prev) {
return resumeTopActivityLocked(prev, null);
}
final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) {
if (mStackSupervisor.inResumeTopActivity) {
// Don't even start recursing.
return false;
}
boolean result = false;
try {
// Protect against recursion.
mStackSupervisor.inResumeTopActivity = true;
if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) {
mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN;
mService.updateSleepIfNeededLocked();
}
result = resumeTopActivityInnerLocked(prev, options);
} finally {
mStackSupervisor.inResumeTopActivity = false;
}
return result;
}
final boolean resumeTopActivityInnerLocked(ActivityRecord prev, Bundle options) {
if (ActivityManagerService.DEBUG_LOCKSCREEN) mService.logLockScreen("");
if (!mService.mBooting && !mService.mBooted) {
// Not ready yet!
return false;
}
ActivityRecord parent = mActivityContainer.mParentActivity;
if ((parent != null && parent.state != ActivityState.RESUMED) ||
!mActivityContainer.isAttachedLocked()) {
// Do not resume this stack if its parent is not resumed.
// TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st.
return false;
}
cancelInitializingActivities();
// Find the first activity that is not finishing.
final ActivityRecord next = topRunningActivityLocked(null);
// Remember how we'll process this pause/resume situation, and ensure
// that the state is reset however we wind up proceeding.
final boolean userLeaving = mStackSupervisor.mUserLeaving;
mStackSupervisor.mUserLeaving = false;
final TaskRecord prevTask = prev != null ? prev.task : null;
if (next == null) {
// There are no more activities! Let's just start up the
// Launcher...
ActivityOptions.abort(options);
if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home");
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
// Only resume home if on home display
final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ?
HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo();
return isOnHomeDisplay() &&
mStackSupervisor.resumeHomeStackTask(returnTaskType, prev);
}
next.delayedResume = false;
// If the top activity is the resumed one, nothing to do.
if (mResumedActivity == next && next.state == ActivityState.RESUMED &&
mStackSupervisor.allResumedActivitiesComplete()) {
// Make sure we have executed any pending transitions, since there
// should be nothing left to do at this point.
mWindowManager.executeAppTransition();
mNoAnimActivities.clear();
ActivityOptions.abort(options);
if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next);
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
final TaskRecord nextTask = next.task;
if (prevTask != null && prevTask.stack == this &&
prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) {
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
if (prevTask == nextTask) {
prevTask.setFrontOfTask();
} else if (prevTask != topTask()) {
// This task is going away but it was supposed to return to the home stack.
// Now the task above it has to return to the home task instead.
final int taskNdx = mTaskHistory.indexOf(prevTask) + 1;
mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE);
} else {
if (DEBUG_STATES && isOnHomeDisplay()) Slog.d(TAG,
"resumeTopActivityLocked: Launching home next");
// Only resume home if on home display
final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ?
HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo();
return isOnHomeDisplay() &&
mStackSupervisor.resumeHomeStackTask(returnTaskType, prev);
}
}
// If we are sleeping, and there is no resumed activity, and the top
// activity is paused, well that is the state we want.
if (mService.isSleepingOrShuttingDown()
&& mLastPausedActivity == next
&& mStackSupervisor.allPausedActivitiesComplete()) {
// Make sure we have executed any pending transitions, since there
// should be nothing left to do at this point.
mWindowManager.executeAppTransition();
mNoAnimActivities.clear();
ActivityOptions.abort(options);
if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused");
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
// Make sure that the user who owns this activity is started. If not,
// we will just leave it as is because someone should be bringing
// another user's activities to the top of the stack.
if (mService.mStartedUsers.get(next.userId) == null) {
Slog.w(TAG, "Skipping resume of top activity " + next
+ ": user " + next.userId + " is stopped");
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
// The activity may be waiting for stop, but that is no longer
// appropriate for it.
mStackSupervisor.mStoppingActivities.remove(next);
mStackSupervisor.mGoingToSleepActivities.remove(next);
next.sleeping = false;
mStackSupervisor.mWaitingVisibleActivities.remove(next);
if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next);
// If we are currently pausing an activity, then don't do anything
// until that is done.
if (!mStackSupervisor.allPausedActivitiesComplete()) {
if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG,
"resumeTopActivityLocked: Skip resume: some activity pausing.");
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
// Okay we are now going to start a switch, to 'next'. We may first
// have to pause the current activity, but this is an important point
// where we have decided to go to 'next' so keep track of that.
// XXX "App Redirected" dialog is getting too many false positives
// at this point, so turn off for now.
if (false) {
if (mLastStartedActivity != null && !mLastStartedActivity.finishing) {
long now = SystemClock.uptimeMillis();
final boolean inTime = mLastStartedActivity.startTime != 0
&& (mLastStartedActivity.startTime + START_WARN_TIME) >= now;
final int lastUid = mLastStartedActivity.info.applicationInfo.uid;
final int nextUid = next.info.applicationInfo.uid;
if (inTime && lastUid != nextUid
&& lastUid != next.launchedFromUid
&& mService.checkPermission(
android.Manifest.permission.STOP_APP_SWITCHES,
-1, next.launchedFromUid)
!= PackageManager.PERMISSION_GRANTED) {
mService.showLaunchWarningLocked(mLastStartedActivity, next);
} else {
next.startTime = now;
mLastStartedActivity = next;
}
} else {
next.startTime = SystemClock.uptimeMillis();
mLastStartedActivity = next;
}
}
// We need to start pausing the current activity so the top one
// can be resumed...
boolean dontWaitForPause = (next.info.flags&ActivityInfo.FLAG_RESUME_WHILE_PAUSING) != 0;
boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause);
if (mResumedActivity != null) {
if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity);
pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause);
}
if (pausing) {
if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG,
"resumeTopActivityLocked: Skip resume: need to start pausing");
// At this point we want to put the upcoming activity's process
// at the top of the LRU list, since we know we will be needing it
// very soon and it would be a waste to let it get killed if it
// happens to be sitting towards the end.
if (next.app != null && next.app.thread != null) {
mService.updateLruProcessLocked(next.app, true, null);
}
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
// If the most recent activity was noHistory but was only stopped rather
// than stopped+finished because the device went to sleep, we need to make
// sure to finish it as we're making a new activity topmost.
if (mService.isSleeping() && mLastNoHistoryActivity != null &&
!mLastNoHistoryActivity.finishing) {
if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity +
" on new resume");
requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED,
null, "no-history", false);
mLastNoHistoryActivity = null;
}
if (prev != null && prev != next) {
if (!prev.waitingVisible && next != null && !next.nowVisible) {
prev.waitingVisible = true;
mStackSupervisor.mWaitingVisibleActivities.add(prev);
if (DEBUG_SWITCH) Slog.v(
TAG, "Resuming top, waiting visible to hide: " + prev);
} else {
// The next activity is already visible, so hide the previous
// activity's windows right now so we can show the new one ASAP.
// We only do this if the previous is finishing, which should mean
// it is on top of the one being resumed so hiding it quickly
// is good. Otherwise, we want to do the normal route of allowing
// the resumed activity to be shown so we can decide if the
// previous should actually be hidden depending on whether the
// new one is found to be full-screen or not.
if (prev.finishing) {
mWindowManager.setAppVisibility(prev.appToken, false);
if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: "
+ prev + ", waitingVisible="
+ (prev != null ? prev.waitingVisible : null)
+ ", nowVisible=" + next.nowVisible);
} else {
if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: "
+ prev + ", waitingVisible="
+ (prev != null ? prev.waitingVisible : null)
+ ", nowVisible=" + next.nowVisible);
}
}
}
// Launching this app's activity, make sure the app is no longer
// considered stopped.
try {
AppGlobals.getPackageManager().setPackageStoppedState(
next.packageName, false, next.userId); /* TODO: Verify if correct userid */
} catch (RemoteException e1) {
} catch (IllegalArgumentException e) {
Slog.w(TAG, "Failed trying to unstop package "
+ next.packageName + ": " + e);
}
// We are starting up the next activity, so tell the window manager
// that the previous one will be hidden soon. This way it can know
// to ignore it when computing the desired screen orientation.
boolean anim = true;
if (prev != null) {
if (prev.finishing) {
if (DEBUG_TRANSITION) Slog.v(TAG,
"Prepare close transition: prev=" + prev);
if (mNoAnimActivities.contains(prev)) {
anim = false;
mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false);
} else {
mWindowManager.prepareAppTransition(prev.task == next.task
? AppTransition.TRANSIT_ACTIVITY_CLOSE
: AppTransition.TRANSIT_TASK_CLOSE, false);
}
mWindowManager.setAppWillBeHidden(prev.appToken);
mWindowManager.setAppVisibility(prev.appToken, false);
} else {
if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev);
if (mNoAnimActivities.contains(next)) {
anim = false;
mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false);
} else {
mWindowManager.prepareAppTransition(prev.task == next.task
? AppTransition.TRANSIT_ACTIVITY_OPEN
: next.mLaunchTaskBehind
? AppTransition.TRANSIT_TASK_OPEN_BEHIND
: AppTransition.TRANSIT_TASK_OPEN, false);
}
}
if (false) {
mWindowManager.setAppWillBeHidden(prev.appToken);
mWindowManager.setAppVisibility(prev.appToken, false);
}
} else {
if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous");
if (mNoAnimActivities.contains(next)) {
anim = false;
mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false);
} else {
mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false);
}
}
Bundle resumeAnimOptions = null;
if (anim) {
ActivityOptions opts = next.getOptionsForTargetActivityLocked();
if (opts != null) {
resumeAnimOptions = opts.toBundle();
}
next.applyOptionsLocked();
} else {
next.clearOptionsLocked();
}
ActivityStack lastStack = mStackSupervisor.getLastStack();
if (next.app != null && next.app.thread != null) {
if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next);
// This activity is now becoming visible.
mWindowManager.setAppVisibility(next.appToken, true);
// schedule launch ticks to collect information about slow apps.
next.startLaunchTickingLocked();
ActivityRecord lastResumedActivity =
lastStack == null ? null :lastStack.mResumedActivity;
ActivityState lastState = next.state;
mService.updateCpuStats();
if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)");
next.state = ActivityState.RESUMED;
mResumedActivity = next;
next.task.touchActiveTime();
mService.addRecentTaskLocked(next.task);
mService.updateLruProcessLocked(next.app, true, null);
updateLRUListLocked(next);
mService.updateOomAdjLocked();
// Have the window manager re-evaluate the orientation of
// the screen based on the new activity order.
boolean notUpdated = true;
if (mStackSupervisor.isFrontStack(this)) {
Configuration config = mWindowManager.updateOrientationFromAppTokens(
mService.mConfiguration,
next.mayFreezeScreenLocked(next.app) ? next.appToken : null);
if (config != null) {
next.frozenBeforeDestroy = true;
}
notUpdated = !mService.updateConfigurationLocked(config, next, false, false);
}
if (notUpdated) {
// The configuration update wasn't able to keep the existing
// instance of the activity, and instead started a new one.
// We should be all done, but let's just make sure our activity
// is still at the top and schedule another run if something
// weird happened.
ActivityRecord nextNext = topRunningActivityLocked(null);
if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG,
"Activity config changed during resume: " + next
+ ", new next: " + nextNext);
if (nextNext != next) {
// Do over!
mStackSupervisor.scheduleResumeTopActivities();
}
if (mStackSupervisor.reportResumedActivityLocked(next)) {
mNoAnimActivities.clear();
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
try {
// Deliver all pending results.
ArrayList<ResultInfo> a = next.results;
if (a != null) {
final int N = a.size();
if (!next.finishing && N > 0) {
if (DEBUG_RESULTS) Slog.v(
TAG, "Delivering results to " + next
+ ": " + a);
next.app.thread.scheduleSendResult(next.appToken, a);
}
}
if (next.newIntents != null) {
next.app.thread.scheduleNewIntent(next.newIntents, next.appToken);
}
EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY,
next.userId, System.identityHashCode(next),
next.task.taskId, next.shortComponentName + " top="
+ mStacks.get(mStacks.size() - 1).mStackId + " Callers="
+ Debug.getCallers(6));
next.sleeping = false;
mService.showAskCompatModeDialogLocked(next);
next.app.pendingUiClean = true;
next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP);
next.clearOptionsLocked();
next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState,
mService.isNextTransitionForward(), resumeAnimOptions);
mStackSupervisor.checkReadyForSleepLocked();
if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next);
} catch (Exception e) {
// Whoops, need to restart this activity!
if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to "
+ lastState + ": " + next);
next.state = lastState;
if (lastStack != null) {
lastStack.mResumedActivity = lastResumedActivity;
}
Slog.i(TAG, "Restarting because process died: " + next);
if (!next.hasBeenLaunched) {
next.hasBeenLaunched = true;
} else if (SHOW_APP_STARTING_PREVIEW && lastStack != null &&
mStackSupervisor.isFrontStack(lastStack)) {
mWindowManager.setAppStartingWindow(
next.appToken, next.packageName, next.theme,
mService.compatibilityInfoForPackageLocked(next.info.applicationInfo),
next.nonLocalizedLabel, next.labelRes, next.icon, next.logo,
next.windowFlags, null, true);
}
mStackSupervisor.startSpecificActivityLocked(next, true, false);
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
// From this point on, if something goes wrong there is no way
// to recover the activity.
try {
next.visible = true;
completeResumeLocked(next);
} catch (Exception e) {
// If any exception gets thrown, toss away this
// activity and try the next one.
Slog.w(TAG, "Exception thrown during resume of " + next, e);
requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null,
"resume-exception", true);
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
next.stopped = false;
} else {
// Whoops, need to restart this activity!
if (!next.hasBeenLaunched) {
next.hasBeenLaunched = true;
} else {
if (SHOW_APP_STARTING_PREVIEW) {
mWindowManager.setAppStartingWindow(
next.appToken, next.packageName, next.theme,
mService.compatibilityInfoForPackageLocked(
next.info.applicationInfo),
next.nonLocalizedLabel,
next.labelRes, next.icon, next.logo, next.windowFlags,
null, true);
}
if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next);
}
if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next);
mStackSupervisor.startSpecificActivityLocked(next, true, true);
}
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
private void insertTaskAtTop(TaskRecord task) {
// If this is being moved to the top by another activity or being launched from the home
// activity, set mOnTopOfHome accordingly.
if (isOnHomeDisplay()) {
ActivityStack lastStack = mStackSupervisor.getLastStack();
final boolean fromHome = lastStack.isHomeStack();
if (!isHomeStack() && (fromHome || topTask() != task)) {
task.setTaskToReturnTo(fromHome
? lastStack.topTask() == null
? HOME_ACTIVITY_TYPE
: lastStack.topTask().taskType
: APPLICATION_ACTIVITY_TYPE);
}
} else {
task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE);
}
mTaskHistory.remove(task);
// Now put task at top.
int taskNdx = mTaskHistory.size();
if (!isCurrentProfileLocked(task.userId)) {
// Put non-current user tasks below current user tasks.
while (--taskNdx >= 0) {
if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) {
break;
}
}
++taskNdx;
}
mTaskHistory.add(taskNdx, task);
updateTaskMovement(task, true);
}
final void startActivityLocked(ActivityRecord r, boolean newTask,
boolean doResume, boolean keepCurTransition, Bundle options) {
TaskRecord rTask = r.task;
final int taskId = rTask.taskId;
// mLaunchTaskBehind tasks get placed at the back of the task stack.
if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) {
// Last activity in task had been removed or ActivityManagerService is reusing task.
// Insert or replace.
// Might not even be in.
insertTaskAtTop(rTask);
mWindowManager.moveTaskToTop(taskId);
}
TaskRecord task = null;
if (!newTask) {
// If starting in an existing task, find where that is...
boolean startIt = true;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
task = mTaskHistory.get(taskNdx);
if (task.getTopActivity() == null) {
// All activities in task are finishing.
continue;
}
if (task == r.task) {
// Here it is! Now, if this is not yet visible to the
// user, then just add it without starting; it will
// get started when the user navigates back to it.
if (!startIt) {
if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task "
+ task, new RuntimeException("here").fillInStackTrace());
task.addActivityToTop(r);
r.putInHistory();
mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken,
r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen,
(r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0,
r.userId, r.info.configChanges, task.voiceSession != null,
r.mLaunchTaskBehind);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
ActivityOptions.abort(options);
return;
}
break;
} else if (task.numFullscreen > 0) {
startIt = false;
}
}
}
// Place a new activity at top of stack, so it is next to interact
// with the user.
// If we are not placing the new activity frontmost, we do not want
// to deliver the onUserLeaving callback to the actual frontmost
// activity
if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) {
mStackSupervisor.mUserLeaving = false;
if (DEBUG_USER_LEAVING) Slog.v(TAG,
"startActivity() behind front, mUserLeaving=false");
}
task = r.task;
// Slot the activity into the history stack and proceed
if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task,
new RuntimeException("here").fillInStackTrace());
task.addActivityToTop(r);
task.setFrontOfTask();
r.putInHistory();
if (!isHomeStack() || numActivities() > 0) {
// We want to show the starting preview window if we are
// switching to a new task, or the next activity's process is
// not currently running.
boolean showStartingIcon = newTask;
ProcessRecord proc = r.app;
if (proc == null) {
proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid);
}
if (proc == null || proc.thread == null) {
showStartingIcon = true;
}
if (DEBUG_TRANSITION) Slog.v(TAG,
"Prepare open transition: starting " + r);
if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) {
mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition);
mNoAnimActivities.add(r);
} else {
mWindowManager.prepareAppTransition(newTask
? r.mLaunchTaskBehind
? AppTransition.TRANSIT_TASK_OPEN_BEHIND
: AppTransition.TRANSIT_TASK_OPEN
: AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition);
mNoAnimActivities.remove(r);
}
mWindowManager.addAppToken(task.mActivities.indexOf(r),
r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen,
(r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId,
r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind);
boolean doShow = true;
if (newTask) {
// Even though this activity is starting fresh, we still need
// to reset it to make sure we apply affinities to move any
// existing activities from other tasks in to it.
// If the caller has requested that the target task be
// reset, then do so.
if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) {
resetTaskIfNeededLocked(r, r);
doShow = topRunningNonDelayedActivityLocked(null) == r;
}
} else if (options != null && new ActivityOptions(options).getAnimationType()
== ActivityOptions.ANIM_SCENE_TRANSITION) {
doShow = false;
}
if (r.mLaunchTaskBehind) {
// Don't do a starting window for mLaunchTaskBehind. More importantly make sure we
// tell WindowManager that r is visible even though it is at the back of the stack.
mWindowManager.setAppVisibility(r.appToken, true);
ensureActivitiesVisibleLocked(null, 0);
} else if (SHOW_APP_STARTING_PREVIEW && doShow) {
// Figure out if we are transitioning from another activity that is
// "has the same starting icon" as the next one. This allows the
// window manager to keep the previous window it had previously
// created, if it still had one.
ActivityRecord prev = mResumedActivity;
if (prev != null) {
// We don't want to reuse the previous starting preview if:
// (1) The current activity is in a different task.
if (prev.task != r.task) {
prev = null;
}
// (2) The current activity is already displayed.
else if (prev.nowVisible) {
prev = null;
}
}
mWindowManager.setAppStartingWindow(
r.appToken, r.packageName, r.theme,
mService.compatibilityInfoForPackageLocked(
r.info.applicationInfo), r.nonLocalizedLabel,
r.labelRes, r.icon, r.logo, r.windowFlags,
prev != null ? prev.appToken : null, showStartingIcon);
r.mStartingWindowShown = true;
}
} else {
// If this is the first activity, don't do any fancy animations,
// because there is nothing for it to animate on top of.
mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken,
r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen,
(r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId,
r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind);
ActivityOptions.abort(options);
options = null;
}
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
if (doResume) {
mStackSupervisor.resumeTopActivitiesLocked(this, r, options);
}
}
final void validateAppTokensLocked() {
mValidateAppTokens.clear();
mValidateAppTokens.ensureCapacity(numActivities());
final int numTasks = mTaskHistory.size();
for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) {
TaskRecord task = mTaskHistory.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
if (activities.isEmpty()) {
continue;
}
TaskGroup group = new TaskGroup();
group.taskId = task.taskId;
mValidateAppTokens.add(group);
final int numActivities = activities.size();
for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
group.tokens.add(r.appToken);
}
}
mWindowManager.validateAppTokens(mStackId, mValidateAppTokens);
}
/**
* Perform a reset of the given task, if needed as part of launching it.
* Returns the new HistoryRecord at the top of the task.
*/
/**
* Helper method for #resetTaskIfNeededLocked.
* We are inside of the task being reset... we'll either finish this activity, push it out
* for another task, or leave it as-is.
* @param task The task containing the Activity (taskTop) that might be reset.
* @param forceReset
* @return An ActivityOptions that needs to be processed.
*/
final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) {
ActivityOptions topOptions = null;
int replyChainEnd = -1;
boolean canMoveOptions = true;
// We only do this for activities that are not the root of the task (since if we finish
// the root, we may no longer have the task!).
final ArrayList<ActivityRecord> activities = task.mActivities;
final int numActivities = activities.size();
final int rootActivityNdx = task.findEffectiveRootIndex();
for (int i = numActivities - 1; i > rootActivityNdx; --i ) {
ActivityRecord target = activities.get(i);
if (target.frontOfTask)
break;
final int flags = target.info.flags;
final boolean finishOnTaskLaunch =
(flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0;
final boolean allowTaskReparenting =
(flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0;
final boolean clearWhenTaskReset =
(target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0;
if (!finishOnTaskLaunch
&& !clearWhenTaskReset
&& target.resultTo != null) {
// If this activity is sending a reply to a previous
// activity, we can't do anything with it now until
// we reach the start of the reply chain.
// XXX note that we are assuming the result is always
// to the previous activity, which is almost always
// the case but we really shouldn't count on.
if (replyChainEnd < 0) {
replyChainEnd = i;
}
} else if (!finishOnTaskLaunch
&& !clearWhenTaskReset
&& allowTaskReparenting
&& target.taskAffinity != null
&& !target.taskAffinity.equals(task.affinity)) {
// If this activity has an affinity for another
// task, then we need to move it out of here. We will
// move it as far out of the way as possible, to the
// bottom of the activity stack. This also keeps it
// correctly ordered with any activities we previously
// moved.
final TaskRecord targetTask;
final ActivityRecord bottom =
!mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ?
mTaskHistory.get(0).mActivities.get(0) : null;
if (bottom != null && target.taskAffinity != null
&& target.taskAffinity.equals(bottom.task.affinity)) {
// If the activity currently at the bottom has the
// same task affinity as the one we are moving,
// then merge it into the same task.
targetTask = bottom.task;
if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target
+ " out to bottom task " + bottom.task);
} else {
targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info,
null, null, null, false);
targetTask.affinityIntent = target.intent;
if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target
+ " out to new task " + target.task);
}
final int targetTaskId = targetTask.taskId;
mWindowManager.setAppGroupId(target.appToken, targetTaskId);
boolean noOptions = canMoveOptions;
final int start = replyChainEnd < 0 ? i : replyChainEnd;
for (int srcPos = start; srcPos >= i; --srcPos) {
final ActivityRecord p = activities.get(srcPos);
if (p.finishing) {
continue;
}
canMoveOptions = false;
if (noOptions && topOptions == null) {
topOptions = p.takeOptionsLocked();
if (topOptions != null) {
noOptions = false;
}
}
if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task="
+ task + " adding to task=" + targetTask
+ " Callers=" + Debug.getCallers(4));
if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p
+ " out to target's task " + target.task);
p.setTask(targetTask, null);
targetTask.addActivityAtBottom(p);
mWindowManager.setAppGroupId(p.appToken, targetTaskId);
}
mWindowManager.moveTaskToBottom(targetTaskId);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
replyChainEnd = -1;
} else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) {
// If the activity should just be removed -- either
// because it asks for it, or the task should be
// cleared -- then finish it and anything that is
// part of its reply chain.
int end;
if (clearWhenTaskReset) {
// In this case, we want to finish this activity
// and everything above it, so be sneaky and pretend
// like these are all in the reply chain.
end = numActivities - 1;
} else if (replyChainEnd < 0) {
end = i;
} else {
end = replyChainEnd;
}
boolean noOptions = canMoveOptions;
for (int srcPos = i; srcPos <= end; srcPos++) {
ActivityRecord p = activities.get(srcPos);
if (p.finishing) {
continue;
}
canMoveOptions = false;
if (noOptions && topOptions == null) {
topOptions = p.takeOptionsLocked();
if (topOptions != null) {
noOptions = false;
}
}
if (DEBUG_TASKS) Slog.w(TAG,
"resetTaskIntendedTask: calling finishActivity on " + p);
if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) {
end--;
srcPos--;
}
}
replyChainEnd = -1;
} else {
// If we were in the middle of a chain, well the
// activity that started it all doesn't want anything
// special, so leave it all as-is.
replyChainEnd = -1;
}
}
return topOptions;
}
/**
* Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given
* TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop.
* @param affinityTask The task we are looking for an affinity to.
* @param task Task that resetTaskIfNeededLocked.taskTop belongs to.
* @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked.
* @param forceReset Flag passed in to resetTaskIfNeededLocked.
*/
private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task,
boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) {
int replyChainEnd = -1;
final int taskId = task.taskId;
final String taskAffinity = task.affinity;
final ArrayList<ActivityRecord> activities = affinityTask.mActivities;
final int numActivities = activities.size();
final int rootActivityNdx = affinityTask.findEffectiveRootIndex();
// Do not operate on or below the effective root Activity.
for (int i = numActivities - 1; i > rootActivityNdx; --i) {
ActivityRecord target = activities.get(i);
if (target.frontOfTask)
break;
final int flags = target.info.flags;
boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0;
boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0;
if (target.resultTo != null) {
// If this activity is sending a reply to a previous
// activity, we can't do anything with it now until
// we reach the start of the reply chain.
// XXX note that we are assuming the result is always
// to the previous activity, which is almost always
// the case but we really shouldn't count on.
if (replyChainEnd < 0) {
replyChainEnd = i;
}
} else if (topTaskIsHigher
&& allowTaskReparenting
&& taskAffinity != null
&& taskAffinity.equals(target.taskAffinity)) {
// This activity has an affinity for our task. Either remove it if we are
// clearing or move it over to our task. Note that
// we currently punt on the case where we are resetting a
// task that is not at the top but who has activities above
// with an affinity to it... this is really not a normal
// case, and we will need to later pull that task to the front
// and usually at that point we will do the reset and pick
// up those remaining activities. (This only happens if
// someone starts an activity in a new task from an activity
// in a task that is not currently on top.)
if (forceReset || finishOnTaskLaunch) {
final int start = replyChainEnd >= 0 ? replyChainEnd : i;
if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i);
for (int srcPos = start; srcPos >= i; --srcPos) {
final ActivityRecord p = activities.get(srcPos);
if (p.finishing) {
continue;
}
finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false);
}
} else {
if (taskInsertionPoint < 0) {
taskInsertionPoint = task.mActivities.size();
}
final int start = replyChainEnd >= 0 ? replyChainEnd : i;
if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":"
+ start + "-" + i + " to task=" + task + ":" + taskInsertionPoint);
for (int srcPos = start; srcPos >= i; --srcPos) {
final ActivityRecord p = activities.get(srcPos);
p.setTask(task, null);
task.addActivityAtIndex(taskInsertionPoint, p);
if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p
+ " to stack at " + task,
new RuntimeException("here").fillInStackTrace());
if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos
+ " in to resetting task " + task);
mWindowManager.setAppGroupId(p.appToken, taskId);
}
mWindowManager.moveTaskToTop(taskId);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
// Now we've moved it in to place... but what if this is
// a singleTop activity and we have put it on top of another
// instance of the same activity? Then we drop the instance
// below so it remains singleTop.
if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) {
ArrayList<ActivityRecord> taskActivities = task.mActivities;
int targetNdx = taskActivities.indexOf(target);
if (targetNdx > 0) {
ActivityRecord p = taskActivities.get(targetNdx - 1);
if (p.intent.getComponent().equals(target.intent.getComponent())) {
finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace",
false);
}
}
}
}
replyChainEnd = -1;
}
}
return taskInsertionPoint;
}
final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop,
ActivityRecord newActivity) {
boolean forceReset =
(newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0;
if (ACTIVITY_INACTIVE_RESET_TIME > 0
&& taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) {
if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) {
forceReset = true;
}
}
final TaskRecord task = taskTop.task;
/** False until we evaluate the TaskRecord associated with taskTop. Switches to true
* for remaining tasks. Used for later tasks to reparent to task. */
boolean taskFound = false;
/** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */
ActivityOptions topOptions = null;
// Preserve the location for reparenting in the new task.
int reparentInsertionPoint = -1;
for (int i = mTaskHistory.size() - 1; i >= 0; --i) {
final TaskRecord targetTask = mTaskHistory.get(i);
if (targetTask == task) {
topOptions = resetTargetTaskIfNeededLocked(task, forceReset);
taskFound = true;
} else {
reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task,
taskFound, forceReset, reparentInsertionPoint);
}
}
int taskNdx = mTaskHistory.indexOf(task);
do {
taskTop = mTaskHistory.get(taskNdx--).getTopActivity();
} while (taskTop == null && taskNdx >= 0);
if (topOptions != null) {
// If we got some ActivityOptions from an activity on top that
// was removed from the task, propagate them to the new real top.
if (taskTop != null) {
taskTop.updateOptionsLocked(topOptions);
} else {
topOptions.abort();
}
}
return taskTop;
}
void sendActivityResultLocked(int callingUid, ActivityRecord r,
String resultWho, int requestCode, int resultCode, Intent data) {
if (callingUid > 0) {
mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName,
data, r.getUriPermissionsLocked(), r.userId);
}
if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r
+ " : who=" + resultWho + " req=" + requestCode
+ " res=" + resultCode + " data=" + data);
if (mResumedActivity == r && r.app != null && r.app.thread != null) {
try {
ArrayList<ResultInfo> list = new ArrayList<ResultInfo>();
list.add(new ResultInfo(resultWho, requestCode,
resultCode, data));
r.app.thread.scheduleSendResult(r.appToken, list);
return;
} catch (Exception e) {
Slog.w(TAG, "Exception thrown sending result to " + r, e);
}
}
r.addResultLocked(null, resultWho, requestCode, resultCode, data);
}
private void adjustFocusedActivityLocked(ActivityRecord r) {
if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) {
ActivityRecord next = topRunningActivityLocked(null);
if (next != r) {
final TaskRecord task = r.task;
if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) {
mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo());
}
}
ActivityRecord top = mStackSupervisor.topRunningActivityLocked();
if (top != null) {
mService.setFocusedActivityLocked(top);
}
}
}
final void stopActivityLocked(ActivityRecord r) {
if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r);
if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0
|| (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) {
if (!r.finishing) {
if (!mService.isSleeping()) {
if (DEBUG_STATES) {
Slog.d(TAG, "no-history finish of " + r);
}
requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null,
"no-history", false);
} else {
if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r
+ " on stop because we're just sleeping");
}
}
}
if (r.app != null && r.app.thread != null) {
adjustFocusedActivityLocked(r);
r.resumeKeyDispatchingLocked();
try {
r.stopped = false;
if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r
+ " (stop requested)");
r.state = ActivityState.STOPPING;
if (DEBUG_VISBILITY) Slog.v(
TAG, "Stopping visible=" + r.visible + " for " + r);
if (!r.visible) {
mWindowManager.setAppVisibility(r.appToken, false);
}
r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags);
if (mService.isSleepingOrShuttingDown()) {
r.setSleeping(true);
}
Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r);
mHandler.sendMessageDelayed(msg, STOP_TIMEOUT);
} catch (Exception e) {
// Maybe just ignore exceptions here... if the process
// has crashed, our death notification will clean things
// up.
Slog.w(TAG, "Exception thrown during pause", e);
// Just in case, assume it to be stopped.
r.stopped = true;
if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r);
r.state = ActivityState.STOPPED;
if (r.configDestroy) {
destroyActivityLocked(r, true, "stop-except");
}
}
}
}
/**
* @return Returns true if the activity is being finished, false if for
* some reason it is being left as-is.
*/
final boolean requestFinishActivityLocked(IBinder token, int resultCode,
Intent resultData, String reason, boolean oomAdj) {
ActivityRecord r = isInStackLocked(token);
if (DEBUG_RESULTS || DEBUG_STATES) Slog.v(
TAG, "Finishing activity token=" + token + " r="
+ ", result=" + resultCode + ", data=" + resultData
+ ", reason=" + reason);
if (r == null) {
return false;
}
finishActivityLocked(r, resultCode, resultData, reason, oomAdj);
return true;
}
final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = activities.get(activityNdx);
if (r.resultTo == self && r.requestCode == requestCode) {
if ((r.resultWho == null && resultWho == null) ||
(r.resultWho != null && r.resultWho.equals(resultWho))) {
finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub",
false);
}
}
}
}
mService.updateOomAdjLocked();
}
final void finishTopRunningActivityLocked(ProcessRecord app) {
ActivityRecord r = topRunningActivityLocked(null);
if (r != null && r.app == app) {
// If the top running activity is from this crashing
// process, then terminate it to avoid getting in a loop.
Slog.w(TAG, " Force finishing activity 1 "
+ r.intent.getComponent().flattenToShortString());
int taskNdx = mTaskHistory.indexOf(r.task);
int activityNdx = r.task.mActivities.indexOf(r);
finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false);
// Also terminate any activities below it that aren't yet
// stopped, to avoid a situation where one will get
// re-start our crashing activity once it gets resumed again.
--activityNdx;
if (activityNdx < 0) {
do {
--taskNdx;
if (taskNdx < 0) {
break;
}
activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1;
} while (activityNdx < 0);
}
if (activityNdx >= 0) {
r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx);
if (r.state == ActivityState.RESUMED
|| r.state == ActivityState.PAUSING
|| r.state == ActivityState.PAUSED) {
if (!r.isHomeActivity() || mService.mHomeProcess != r.app) {
Slog.w(TAG, " Force finishing activity 2 "
+ r.intent.getComponent().flattenToShortString());
finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false);
}
}
}
}
}
final void finishVoiceTask(IVoiceInteractionSession session) {
IBinder sessionBinder = session.asBinder();
boolean didOne = false;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
TaskRecord tr = mTaskHistory.get(taskNdx);
if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) {
for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = tr.mActivities.get(activityNdx);
if (!r.finishing) {
finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice",
false);
didOne = true;
}
}
}
}
if (didOne) {
mService.updateOomAdjLocked();
}
}
final boolean finishActivityAffinityLocked(ActivityRecord r) {
ArrayList<ActivityRecord> activities = r.task.mActivities;
for (int index = activities.indexOf(r); index >= 0; --index) {
ActivityRecord cur = activities.get(index);
if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) {
break;
}
finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true);
}
return true;
}
final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) {
// send the result
ActivityRecord resultTo = r.resultTo;
if (resultTo != null) {
if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo
+ " who=" + r.resultWho + " req=" + r.requestCode
+ " res=" + resultCode + " data=" + resultData);
if (resultTo.userId != r.userId) {
if (resultData != null) {
resultData.setContentUserHint(r.userId);
}
}
if (r.info.applicationInfo.uid > 0) {
mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid,
resultTo.packageName, resultData,
resultTo.getUriPermissionsLocked(), resultTo.userId);
}
resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode,
resultData);
r.resultTo = null;
}
else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r);
// Make sure this HistoryRecord is not holding on to other resources,
// because clients have remote IPC references to this object so we
// can't assume that will go away and want to avoid circular IPC refs.
r.results = null;
r.pendingResults = null;
r.newIntents = null;
r.icicle = null;
}
/**
* @return Returns true if this activity has been removed from the history
* list, or false if it is still in the list and will be removed later.
*/
final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData,
String reason, boolean oomAdj) {
if (r.finishing) {
Slog.w(TAG, "Duplicate finish request for " + r);
return false;
}
r.makeFinishing();
final TaskRecord task = r.task;
EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY,
r.userId, System.identityHashCode(r),
task.taskId, r.shortComponentName, reason);
final ArrayList<ActivityRecord> activities = task.mActivities;
final int index = activities.indexOf(r);
if (index < (activities.size() - 1)) {
task.setFrontOfTask();
if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) {
// If the caller asked that this activity (and all above it)
// be cleared when the task is reset, don't lose that information,
// but propagate it up to the next activity.
ActivityRecord next = activities.get(index+1);
next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
}
}
r.pauseKeyDispatchingLocked();
adjustFocusedActivityLocked(r);
finishActivityResultsLocked(r, resultCode, resultData);
if (mResumedActivity == r) {
boolean endTask = index <= 0;
if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG,
"Prepare close transition: finishing " + r);
mWindowManager.prepareAppTransition(endTask
? AppTransition.TRANSIT_TASK_CLOSE
: AppTransition.TRANSIT_ACTIVITY_CLOSE, false);
// Tell window manager to prepare for this one to be removed.
mWindowManager.setAppVisibility(r.appToken, false);
if (mPausingActivity == null) {
if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r);
if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false");
startPausingLocked(false, false, false, false);
}
if (endTask) {
mStackSupervisor.endLockTaskModeIfTaskEnding(task);
}
} else if (r.state != ActivityState.PAUSING) {
// If the activity is PAUSING, we will complete the finish once
// it is done pausing; else we can just directly finish it here.
if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r);
return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null;
} else {
if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r);
}
return false;
}
static final int FINISH_IMMEDIATELY = 0;
static final int FINISH_AFTER_PAUSE = 1;
static final int FINISH_AFTER_VISIBLE = 2;
final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) {
// First things first: if this activity is currently visible,
// and the resumed activity is not yet visible, then hold off on
// finishing until the resumed one becomes visible.
if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) {
if (!mStackSupervisor.mStoppingActivities.contains(r)) {
mStackSupervisor.mStoppingActivities.add(r);
if (mStackSupervisor.mStoppingActivities.size() > 3
|| r.frontOfTask && mTaskHistory.size() <= 1) {
// If we already have a few activities waiting to stop,
// then give up on things going idle and start clearing
// them out. Or if r is the last of activity of the last task the stack
// will be empty and must be cleared immediately.
mStackSupervisor.scheduleIdleLocked();
} else {
mStackSupervisor.checkReadyForSleepLocked();
}
}
if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r
+ " (finish requested)");
r.state = ActivityState.STOPPING;
if (oomAdj) {
mService.updateOomAdjLocked();
}
return r;
}
// make sure the record is cleaned out of other places.
mStackSupervisor.mStoppingActivities.remove(r);
mStackSupervisor.mGoingToSleepActivities.remove(r);
mStackSupervisor.mWaitingVisibleActivities.remove(r);
if (mResumedActivity == r) {
mResumedActivity = null;
}
final ActivityState prevState = r.state;
if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r);
r.state = ActivityState.FINISHING;
if (mode == FINISH_IMMEDIATELY
|| prevState == ActivityState.STOPPED
|| prevState == ActivityState.INITIALIZING) {
// If this activity is already stopped, we can just finish
// it right now.
r.makeFinishing();
boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm");
if (activityRemoved) {
mStackSupervisor.resumeTopActivitiesLocked();
}
if (DEBUG_CONTAINERS) Slog.d(TAG,
"destroyActivityLocked: finishCurrentActivityLocked r=" + r +
" destroy returned removed=" + activityRemoved);
return activityRemoved ? null : r;
}
// Need to go through the full pause cycle to get this
// activity into the stopped state and then finish it.
if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r);
mStackSupervisor.mFinishingActivities.add(r);
r.resumeKeyDispatchingLocked();
mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null);
return r;
}
void finishAllActivitiesLocked(boolean immediately) {
boolean noActivitiesInStack = true;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
noActivitiesInStack = false;
if (r.finishing && !immediately) {
continue;
}
Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately");
finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false);
}
}
if (noActivitiesInStack) {
mActivityContainer.onTaskListEmptyLocked();
}
}
final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) {
// Basic case: for simple app-centric recents, we need to recreate
// the task if the affinity has changed.
if (srec == null || srec.task.affinity == null ||
!srec.task.affinity.equals(destAffinity)) {
return true;
}
// Document-centric case: an app may be split in to multiple documents;
// they need to re-create their task if this current activity is the root
// of a document, unless simply finishing it will return them to the the
// correct app behind.
if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null
&& srec.task.getBaseIntent().isDocument()) {
// Okay, this activity is at the root of its task. What to do, what to do...
if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) {
// Finishing won't return to an application, so we need to recreate.
return true;
}
// We now need to get the task below it to determine what to do.
int taskIdx = mTaskHistory.indexOf(srec.task);
if (taskIdx <= 0) {
Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec);
return false;
}
if (taskIdx == 0) {
// At the bottom of the stack, nothing to go back to.
return true;
}
TaskRecord prevTask = mTaskHistory.get(taskIdx);
if (!srec.task.affinity.equals(prevTask.affinity)) {
// These are different apps, so need to recreate.
return true;
}
}
return false;
}
final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode,
Intent resultData) {
final ActivityRecord srec = ActivityRecord.forToken(token);
final TaskRecord task = srec.task;
final ArrayList<ActivityRecord> activities = task.mActivities;
final int start = activities.indexOf(srec);
if (!mTaskHistory.contains(task) || (start < 0)) {
return false;
}
int finishTo = start - 1;
ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo);
boolean foundParentInTask = false;
final ComponentName dest = destIntent.getComponent();
if (start > 0 && dest != null) {
for (int i = finishTo; i >= 0; i--) {
ActivityRecord r = activities.get(i);
if (r.info.packageName.equals(dest.getPackageName()) &&
r.info.name.equals(dest.getClassName())) {
finishTo = i;
parent = r;
foundParentInTask = true;
break;
}
}
}
IActivityController controller = mService.mController;
if (controller != null) {
ActivityRecord next = topRunningActivityLocked(srec.appToken, 0);
if (next != null) {
// ask watcher if this is allowed
boolean resumeOK = true;
try {
resumeOK = controller.activityResuming(next.packageName);
} catch (RemoteException e) {
mService.mController = null;
Watchdog.getInstance().setActivityController(null);
}
if (!resumeOK) {
return false;
}
}
}
final long origId = Binder.clearCallingIdentity();
for (int i = start; i > finishTo; i--) {
ActivityRecord r = activities.get(i);
requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true);
// Only return the supplied result for the first activity finished
resultCode = Activity.RESULT_CANCELED;
resultData = null;
}
if (parent != null && foundParentInTask) {
final int parentLaunchMode = parent.info.launchMode;
final int destIntentFlags = destIntent.getFlags();
if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE ||
parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK ||
parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP ||
(destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) {
parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent,
srec.packageName);
} else {
try {
ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo(
destIntent.getComponent(), 0, srec.userId);
int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent,
null, aInfo, null, null, parent.appToken, null,
0, -1, parent.launchedFromUid, parent.launchedFromPackage,
-1, parent.launchedFromUid, 0, null, true, null, null, null);
foundParentInTask = res == ActivityManager.START_SUCCESS;
} catch (RemoteException e) {
foundParentInTask = false;
}
requestFinishActivityLocked(parent.appToken, resultCode,
resultData, "navigate-up", true);
}
}
Binder.restoreCallingIdentity(origId);
return foundParentInTask;
}
/**
* Perform the common clean-up of an activity record. This is called both
* as part of destroyActivityLocked() (when destroying the client-side
* representation) and cleaning things up as a result of its hosting
* processing going away, in which case there is no remaining client-side
* state to destroy so only the cleanup here is needed.
*/
final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices,
boolean setState) {
if (mResumedActivity == r) {
mResumedActivity = null;
}
if (mPausingActivity == r) {
mPausingActivity = null;
}
mService.clearFocusedActivity(r);
r.configDestroy = false;
r.frozenBeforeDestroy = false;
if (setState) {
if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)");
r.state = ActivityState.DESTROYED;
if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r);
r.app = null;
}
// Make sure this record is no longer in the pending finishes list.
// This could happen, for example, if we are trimming activities
// down to the max limit while they are still waiting to finish.
mStackSupervisor.mFinishingActivities.remove(r);
mStackSupervisor.mWaitingVisibleActivities.remove(r);
// Remove any pending results.
if (r.finishing && r.pendingResults != null) {
for (WeakReference<PendingIntentRecord> apr : r.pendingResults) {
PendingIntentRecord rec = apr.get();
if (rec != null) {
mService.cancelIntentSenderLocked(rec, false);
}
}
r.pendingResults = null;
}
if (cleanServices) {
cleanUpActivityServicesLocked(r);
}
// Get rid of any pending idle timeouts.
removeTimeoutsForActivityLocked(r);
if (getVisibleBehindActivity() == r) {
mStackSupervisor.requestVisibleBehindLocked(r, false);
}
}
private void removeTimeoutsForActivityLocked(ActivityRecord r) {
mStackSupervisor.removeTimeoutsForActivityLocked(r);
mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r);
mHandler.removeMessages(STOP_TIMEOUT_MSG, r);
mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r);
r.finishLaunchTickingLocked();
}
private void removeActivityFromHistoryLocked(ActivityRecord r) {
mStackSupervisor.removeChildActivityContainers(r);
finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null);
r.makeFinishing();
if (DEBUG_ADD_REMOVE) {
RuntimeException here = new RuntimeException("here");
here.fillInStackTrace();
Slog.i(TAG, "Removing activity " + r + " from stack");
}
r.takeFromHistory();
removeTimeoutsForActivityLocked(r);
if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)");
r.state = ActivityState.DESTROYED;
if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r);
r.app = null;
mWindowManager.removeAppToken(r.appToken);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
final TaskRecord task = r.task;
if (task != null && task.removeActivity(r)) {
if (DEBUG_STACK) Slog.i(TAG,
"removeActivityFromHistoryLocked: last activity removed from " + this);
if (mStackSupervisor.isFrontStack(this) && task == topTask() &&
task.isOverHomeStack()) {
mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo());
}
removeTask(task);
}
cleanUpActivityServicesLocked(r);
r.removeUriPermissionsLocked();
}
/**
* Perform clean-up of service connections in an activity record.
*/
final void cleanUpActivityServicesLocked(ActivityRecord r) {
// Throw away any services that have been bound by this activity.
if (r.connections != null) {
Iterator<ConnectionRecord> it = r.connections.iterator();
while (it.hasNext()) {
ConnectionRecord c = it.next();
mService.mServices.removeConnectionLocked(c, null, r);
}
r.connections = null;
}
}
final void scheduleDestroyActivities(ProcessRecord owner, String reason) {
Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG);
msg.obj = new ScheduleDestroyArgs(owner, reason);
mHandler.sendMessage(msg);
}
final void destroyActivitiesLocked(ProcessRecord owner, String reason) {
boolean lastIsOpaque = false;
boolean activityRemoved = false;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.finishing) {
continue;
}
if (r.fullscreen) {
lastIsOpaque = true;
}
if (owner != null && r.app != owner) {
continue;
}
if (!lastIsOpaque) {
continue;
}
if (r.isDestroyable()) {
if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state
+ " resumed=" + mResumedActivity
+ " pausing=" + mPausingActivity + " for reason " + reason);
if (destroyActivityLocked(r, true, reason)) {
activityRemoved = true;
}
}
}
}
if (activityRemoved) {
mStackSupervisor.resumeTopActivitiesLocked();
}
}
final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) {
if (r.isDestroyable()) {
if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state
+ " resumed=" + mResumedActivity
+ " pausing=" + mPausingActivity + " for reason " + reason);
return destroyActivityLocked(r, true, reason);
}
return false;
}
final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks,
String reason) {
// Iterate over tasks starting at the back (oldest) first.
if (DEBUG_RELEASE) Slog.d(TAG, "Trying to release some activities in " + app);
int maxTasks = tasks.size() / 4;
if (maxTasks < 1) {
maxTasks = 1;
}
int numReleased = 0;
for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (!tasks.contains(task)) {
continue;
}
if (DEBUG_RELEASE) Slog.d(TAG, "Looking for activities to release in " + task);
int curNum = 0;
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int actNdx = 0; actNdx < activities.size(); actNdx++) {
final ActivityRecord activity = activities.get(actNdx);
if (activity.app == app && activity.isDestroyable()) {
if (DEBUG_RELEASE) Slog.v(TAG, "Destroying " + activity
+ " in state " + activity.state + " resumed=" + mResumedActivity
+ " pausing=" + mPausingActivity + " for reason " + reason);
destroyActivityLocked(activity, true, reason);
if (activities.get(actNdx) != activity) {
// Was removed from list, back up so we don't miss the next one.
actNdx--;
}
curNum++;
}
}
if (curNum > 0) {
numReleased += curNum;
maxTasks--;
if (mTaskHistory.get(taskNdx) != task) {
// The entire task got removed, back up so we don't miss the next one.
taskNdx--;
}
}
}
if (DEBUG_RELEASE) Slog.d(TAG, "Done releasing: did " + numReleased + " activities");
return numReleased;
}
/**
* Destroy the current CLIENT SIDE instance of an activity. This may be
* called both when actually finishing an activity, or when performing
* a configuration switch where we destroy the current client-side object
* but then create a new client-side object for this same HistoryRecord.
*/
final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) {
if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v(
TAG, "Removing activity from " + reason + ": token=" + r
+ ", app=" + (r.app != null ? r.app.processName : "(null)"));
EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY,
r.userId, System.identityHashCode(r),
r.task.taskId, r.shortComponentName, reason);
boolean removedFromHistory = false;
cleanUpActivityLocked(r, false, false);
final boolean hadApp = r.app != null;
if (hadApp) {
if (removeFromApp) {
r.app.activities.remove(r);
if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) {
mService.mHeavyWeightProcess = null;
mService.mHandler.sendEmptyMessage(
ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG);
}
if (r.app.activities.isEmpty()) {
// Update any services we are bound to that might care about whether
// their client may have activities.
mService.mServices.updateServiceConnectionActivitiesLocked(r.app);
// No longer have activities, so update LRU list and oom adj.
mService.updateLruProcessLocked(r.app, false, null);
mService.updateOomAdjLocked();
}
}
boolean skipDestroy = false;
try {
if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r);
r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing,
r.configChangeFlags);
} catch (Exception e) {
// We can just ignore exceptions here... if the process
// has crashed, our death notification will clean things
// up.
//Slog.w(TAG, "Exception thrown during finish", e);
if (r.finishing) {
removeActivityFromHistoryLocked(r);
removedFromHistory = true;
skipDestroy = true;
}
}
r.nowVisible = false;
// If the activity is finishing, we need to wait on removing it
// from the list to give it a chance to do its cleanup. During
// that time it may make calls back with its token so we need to
// be able to find it on the list and so we don't want to remove
// it from the list yet. Otherwise, we can just immediately put
// it in the destroyed state since we are not removing it from the
// list.
if (r.finishing && !skipDestroy) {
if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r
+ " (destroy requested)");
r.state = ActivityState.DESTROYING;
Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r);
mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT);
} else {
if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)");
r.state = ActivityState.DESTROYED;
if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r);
r.app = null;
}
} else {
// remove this record from the history.
if (r.finishing) {
removeActivityFromHistoryLocked(r);
removedFromHistory = true;
} else {
if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)");
r.state = ActivityState.DESTROYED;
if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r);
r.app = null;
}
}
r.configChangeFlags = 0;
if (!mLRUActivities.remove(r) && hadApp) {
Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list");
}
return removedFromHistory;
}
final void activityDestroyedLocked(IBinder token) {
final long origId = Binder.clearCallingIdentity();
try {
ActivityRecord r = ActivityRecord.forToken(token);
if (r != null) {
mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r);
}
if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r);
if (isInStackLocked(token) != null) {
if (r.state == ActivityState.DESTROYING) {
cleanUpActivityLocked(r, true, false);
removeActivityFromHistoryLocked(r);
}
}
mStackSupervisor.resumeTopActivitiesLocked();
} finally {
Binder.restoreCallingIdentity(origId);
}
}
void releaseBackgroundResources() {
if (hasVisibleBehindActivity() &&
!mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) {
final ActivityRecord r = getVisibleBehindActivity();
if (r == topRunningActivityLocked(null)) {
// Don't release the top activity if it has requested to run behind the next
// activity.
return;
}
if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" +
mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app +
" thread=" + r.app.thread);
if (r != null && r.app != null && r.app.thread != null) {
try {
r.app.thread.scheduleCancelVisibleBehind(r.appToken);
} catch (RemoteException e) {
}
mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500);
} else {
Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running");
backgroundResourcesReleased();
}
}
}
final void backgroundResourcesReleased() {
mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG);
final ActivityRecord r = getVisibleBehindActivity();
if (r != null) {
mStackSupervisor.mStoppingActivities.add(r);
setVisibleBehindActivity(null);
mStackSupervisor.scheduleIdleTimeoutLocked(null);
}
mStackSupervisor.resumeTopActivitiesLocked();
}
boolean hasVisibleBehindActivity() {
return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity();
}
void setVisibleBehindActivity(ActivityRecord r) {
if (isAttached()) {
mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r);
}
}
ActivityRecord getVisibleBehindActivity() {
return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null;
}
private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list,
ProcessRecord app, String listName) {
int i = list.size();
if (DEBUG_CLEANUP) Slog.v(
TAG, "Removing app " + app + " from list " + listName
+ " with " + i + " entries");
while (i > 0) {
i--;
ActivityRecord r = list.get(i);
if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r);
if (r.app == app) {
if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!");
list.remove(i);
removeTimeoutsForActivityLocked(r);
}
}
}
boolean removeHistoryRecordsForAppLocked(ProcessRecord app) {
removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities");
removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app,
"mStoppingActivities");
removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app,
"mGoingToSleepActivities");
removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app,
"mWaitingVisibleActivities");
removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app,
"mFinishingActivities");
boolean hasVisibleActivities = false;
// Clean out the history list.
int i = numActivities();
if (DEBUG_CLEANUP) Slog.v(
TAG, "Removing app " + app + " from history with " + i + " entries");
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
--i;
if (DEBUG_CLEANUP) Slog.v(
TAG, "Record #" + i + " " + r + ": app=" + r.app);
if (r.app == app) {
boolean remove;
if ((!r.haveState && !r.stateNotNeeded) || r.finishing) {
// Don't currently have state for the activity, or
// it is finishing -- always remove it.
remove = true;
} else if (r.launchCount > 2 &&
r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) {
// We have launched this activity too many times since it was
// able to run, so give up and remove it.
remove = true;
} else {
// The process may be gone, but the activity lives on!
remove = false;
}
if (remove) {
if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) {
RuntimeException here = new RuntimeException("here");
here.fillInStackTrace();
Slog.i(TAG, "Removing activity " + r + " from stack at " + i
+ ": haveState=" + r.haveState
+ " stateNotNeeded=" + r.stateNotNeeded
+ " finishing=" + r.finishing
+ " state=" + r.state, here);
}
if (!r.finishing) {
Slog.w(TAG, "Force removing " + r + ": app died, no saved state");
EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY,
r.userId, System.identityHashCode(r),
r.task.taskId, r.shortComponentName,
"proc died without state saved");
if (r.state == ActivityState.RESUMED) {
mService.updateUsageStats(r, false);
}
}
removeActivityFromHistoryLocked(r);
} else {
// We have the current state for this activity, so
// it can be restarted later when needed.
if (localLOGV) Slog.v(
TAG, "Keeping entry, setting app to null");
if (r.visible) {
hasVisibleActivities = true;
}
if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity "
+ r);
r.app = null;
r.nowVisible = false;
if (!r.haveState) {
if (DEBUG_SAVED_STATE) Slog.i(TAG,
"App died, clearing saved state of " + r);
r.icicle = null;
}
}
cleanUpActivityLocked(r, true, true);
}
}
}
return hasVisibleActivities;
}
final void updateTransitLocked(int transit, Bundle options) {
if (options != null) {
ActivityRecord r = topRunningActivityLocked(null);
if (r != null && r.state != ActivityState.RESUMED) {
r.updateOptionsLocked(options);
} else {
ActivityOptions.abort(options);
}
}
mWindowManager.prepareAppTransition(transit, false);
}
void updateTaskMovement(TaskRecord task, boolean toFront) {
if (task.isPersistable) {
task.mLastTimeMoved = System.currentTimeMillis();
// Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most
// recently will be most negative, tasks sent to the bottom before that will be less
// negative. Similarly for recent tasks moved to the top which will be most positive.
if (!toFront) {
task.mLastTimeMoved *= -1;
}
}
}
void moveHomeStackTaskToTop(int homeStackTaskType) {
final int top = mTaskHistory.size() - 1;
for (int taskNdx = top; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.taskType == homeStackTaskType) {
if (DEBUG_TASKS || DEBUG_STACK)
Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task);
mTaskHistory.remove(taskNdx);
mTaskHistory.add(top, task);
updateTaskMovement(task, true);
mWindowManager.moveTaskToTop(task.taskId);
return;
}
}
}
final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) {
if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr);
final int numTasks = mTaskHistory.size();
final int index = mTaskHistory.indexOf(tr);
if (numTasks == 0 || index < 0) {
// nothing to do!
if (reason != null &&
(reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) {
ActivityOptions.abort(options);
} else {
updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options);
}
return;
}
// Shift all activities with this task up to the top
// of the stack, keeping them in the same internal order.
insertTaskAtTop(tr);
moveToFront();
if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr);
if (reason != null &&
(reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) {
mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false);
ActivityRecord r = topRunningActivityLocked(null);
if (r != null) {
mNoAnimActivities.add(r);
}
ActivityOptions.abort(options);
} else {
updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options);
}
mStackSupervisor.resumeTopActivitiesLocked();
EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
}
/**
* Worker method for rearranging history stack. Implements the function of moving all
* activities for a specific task (gathering them if disjoint) into a single group at the
* bottom of the stack.
*
* If a watcher is installed, the action is preflighted and the watcher has an opportunity
* to premeptively cancel the move.
*
* @param taskId The taskId to collect and move to the bottom.
* @return Returns true if the move completed, false if not.
*/
final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) {
final TaskRecord tr = taskForIdLocked(taskId);
if (tr == null) {
Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId);
return false;
}
Slog.i(TAG, "moveTaskToBack: " + tr);
mStackSupervisor.endLockTaskModeIfTaskEnding(tr);
// If we have a watcher, preflight the move before committing to it. First check
// for *other* available tasks, but if none are available, then try again allowing the
// current task to be selected.
if (mStackSupervisor.isFrontStack(this) && mService.mController != null) {
ActivityRecord next = topRunningActivityLocked(null, taskId);
if (next == null) {
next = topRunningActivityLocked(null, 0);
}
if (next != null) {
// ask watcher if this is allowed
boolean moveOK = true;
try {
moveOK = mService.mController.activityResuming(next.packageName);
} catch (RemoteException e) {
mService.mController = null;
Watchdog.getInstance().setActivityController(null);
}
if (!moveOK) {
return false;
}
}
}
if (DEBUG_TRANSITION) Slog.v(TAG,
"Prepare to back transition: task=" + taskId);
mTaskHistory.remove(tr);
mTaskHistory.add(0, tr);
updateTaskMovement(tr, false);
// There is an assumption that moving a task to the back moves it behind the home activity.
// We make sure here that some activity in the stack will launch home.
int numTasks = mTaskHistory.size();
for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.isOverHomeStack()) {
break;
}
if (taskNdx == 1) {
// Set the last task before tr to go to home.
task.setTaskToReturnTo(HOME_ACTIVITY_TYPE);
}
}
if (reason != null &&
(reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) {
mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false);
ActivityRecord r = topRunningActivityLocked(null);
if (r != null) {
mNoAnimActivities.add(r);
}
} else {
mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false);
}
mWindowManager.moveTaskToBottom(taskId);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null;
if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) {
if (!mService.mBooting && !mService.mBooted) {
// Not ready yet!
return false;
}
final int taskToReturnTo = tr.getTaskToReturnTo();
tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE);
return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null);
}
mStackSupervisor.resumeTopActivitiesLocked();
return true;
}
static final void logStartActivity(int tag, ActivityRecord r,
TaskRecord task) {
final Uri data = r.intent.getData();
final String strData = data != null ? data.toSafeString() : null;
EventLog.writeEvent(tag,
r.userId, System.identityHashCode(r), task.taskId,
r.shortComponentName, r.intent.getAction(),
r.intent.getType(), strData, r.intent.getFlags());
}
/**
* Make sure the given activity matches the current configuration. Returns
* false if the activity had to be destroyed. Returns true if the
* configuration is the same, or the activity will remain running as-is
* for whatever reason. Ensures the HistoryRecord is updated with the
* correct configuration and all other bookkeeping is handled.
*/
final boolean ensureActivityConfigurationLocked(ActivityRecord r,
int globalChanges) {
if (mConfigWillChange) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Skipping config check (will change): " + r);
return true;
}
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Ensuring correct configuration: " + r);
// Short circuit: if the two configurations are the exact same
// object (the common case), then there is nothing to do.
Configuration newConfig = mService.mConfiguration;
if (r.configuration == newConfig && !r.forceNewConfig) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Configuration unchanged in " + r);
return true;
}
// We don't worry about activities that are finishing.
if (r.finishing) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Configuration doesn't matter in finishing " + r);
r.stopFreezingScreenLocked(false);
return true;
}
// Okay we now are going to make this activity have the new config.
// But then we need to figure out how it needs to deal with that.
Configuration oldConfig = r.configuration;
r.configuration = newConfig;
// Determine what has changed. May be nothing, if this is a config
// that has come back from the app after going idle. In that case
// we just want to leave the official config object now in the
// activity and do nothing else.
final int changes = oldConfig.diff(newConfig);
if (changes == 0 && !r.forceNewConfig) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Configuration no differences in " + r);
return true;
}
// If the activity isn't currently running, just leave the new
// configuration and it will pick that up next time it starts.
if (r.app == null || r.app.thread == null) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Configuration doesn't matter not running " + r);
r.stopFreezingScreenLocked(false);
r.forceNewConfig = false;
return true;
}
// Figure out how to handle the changes between the configurations.
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) {
Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x"
+ Integer.toHexString(changes) + ", handles=0x"
+ Integer.toHexString(r.info.getRealConfigChanged())
+ ", newConfig=" + newConfig);
}
if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) {
// Aha, the activity isn't handling the change, so DIE DIE DIE.
r.configChangeFlags |= changes;
r.startFreezingScreenLocked(r.app, globalChanges);
r.forceNewConfig = false;
if (r.app == null || r.app.thread == null) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Config is destroying non-running " + r);
destroyActivityLocked(r, true, "config");
} else if (r.state == ActivityState.PAUSING) {
// A little annoying: we are waiting for this activity to
// finish pausing. Let's not do anything now, but just
// flag that it needs to be restarted when done pausing.
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Config is skipping already pausing " + r);
r.configDestroy = true;
return true;
} else if (r.state == ActivityState.RESUMED) {
// Try to optimize this case: the configuration is changing
// and we need to restart the top, resumed activity.
// Instead of doing the normal handshaking, just say
// "restart!".
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Config is relaunching resumed " + r);
relaunchActivityLocked(r, r.configChangeFlags, true);
r.configChangeFlags = 0;
} else {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
"Config is relaunching non-resumed " + r);
relaunchActivityLocked(r, r.configChangeFlags, false);
r.configChangeFlags = 0;
}
// All done... tell the caller we weren't able to keep this
// activity around.
return false;
}
// Default case: the activity can handle this new configuration, so
// hand it over. Note that we don't need to give it the new
// configuration, since we always send configuration changes to all
// process when they happen so it can just use whatever configuration
// it last got.
if (r.app != null && r.app.thread != null) {
try {
if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r);
r.app.thread.scheduleActivityConfigurationChanged(r.appToken);
} catch (RemoteException e) {
// If process died, whatever.
}
}
r.stopFreezingScreenLocked(false);
return true;
}
private boolean relaunchActivityLocked(ActivityRecord r,
int changes, boolean andResume) {
List<ResultInfo> results = null;
List<ReferrerIntent> newIntents = null;
if (andResume) {
results = r.results;
newIntents = r.newIntents;
}
if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r
+ " with results=" + results + " newIntents=" + newIntents
+ " andResume=" + andResume);
EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY
: EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r),
r.task.taskId, r.shortComponentName);
r.startFreezingScreenLocked(r.app, 0);
mStackSupervisor.removeChildActivityContainers(r);
try {
if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG,
(andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ")
+ r);
r.forceNewConfig = false;
r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents,
changes, !andResume, new Configuration(mService.mConfiguration));
// Note: don't need to call pauseIfSleepingLocked() here, because
// the caller will only pass in 'andResume' if this activity is
// currently resumed, which implies we aren't sleeping.
} catch (RemoteException e) {
if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e);
}
if (andResume) {
r.results = null;
r.newIntents = null;
r.state = ActivityState.RESUMED;
} else {
mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r);
r.state = ActivityState.PAUSED;
}
return true;
}
boolean willActivityBeVisibleLocked(IBinder token) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.appToken == token) {
return true;
}
if (r.fullscreen && !r.finishing) {
return false;
}
}
}
final ActivityRecord r = ActivityRecord.forToken(token);
if (r == null) {
return false;
}
if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false,"
+ " would have returned true for r=" + r);
return !r.finishing;
}
void closeSystemDialogsLocked() {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) {
finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true);
}
}
}
}
boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) {
boolean didSomething = false;
TaskRecord lastTask = null;
ComponentName homeActivity = null;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
int numActivities = activities.size();
for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) {
ActivityRecord r = activities.get(activityNdx);
final boolean samePackage = r.packageName.equals(name)
|| (name == null && r.userId == userId);
if ((userId == UserHandle.USER_ALL || r.userId == userId)
&& (samePackage || r.task == lastTask)
&& (r.app == null || evenPersistent || !r.app.persistent)) {
if (!doit) {
if (r.finishing) {
// If this activity is just finishing, then it is not
// interesting as far as something to stop.
continue;
}
return true;
}
if (r.isHomeActivity()) {
if (homeActivity != null && homeActivity.equals(r.realActivity)) {
Slog.i(TAG, "Skip force-stop again " + r);
continue;
} else {
homeActivity = r.realActivity;
}
}
didSomething = true;
Slog.i(TAG, " Force finishing activity 3 " + r);
if (samePackage) {
if (r.app != null) {
r.app.removed = true;
}
r.app = null;
}
lastTask = r.task;
if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop",
true)) {
// r has been deleted from mActivities, accommodate.
--numActivities;
--activityNdx;
}
}
}
}
return didSomething;
}
void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
ActivityRecord r = null;
ActivityRecord top = null;
int numActivities = 0;
int numRunning = 0;
final ArrayList<ActivityRecord> activities = task.mActivities;
if (activities.isEmpty()) {
continue;
}
if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) {
continue;
}
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
r = activities.get(activityNdx);
// Initialize state for next task if needed.
if (top == null || (top.state == ActivityState.INITIALIZING)) {
top = r;
numActivities = numRunning = 0;
}
// Add 'r' into the current task.
numActivities++;
if (r.app != null && r.app.thread != null) {
numRunning++;
}
if (localLOGV) Slog.v(
TAG, r.intent.getComponent().flattenToShortString()
+ ": task=" + r.task);
}
RunningTaskInfo ci = new RunningTaskInfo();
ci.id = task.taskId;
ci.baseActivity = r.intent.getComponent();
ci.topActivity = top.intent.getComponent();
ci.lastActiveTime = task.lastActiveTime;
if (top.task != null) {
ci.description = top.task.lastDescription;
}
ci.numActivities = numActivities;
ci.numRunning = numRunning;
//System.out.println(
// "#" + maxNum + ": " + " descr=" + ci.description);
list.add(ci);
}
}
public void unhandledBackLocked() {
final int top = mTaskHistory.size() - 1;
if (DEBUG_SWITCH) Slog.d(
TAG, "Performing unhandledBack(): top activity at " + top);
if (top >= 0) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities;
int activityTop = activities.size() - 1;
if (activityTop > 0) {
finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null,
"unhandled-back", true);
}
}
}
/**
* Reset local parameters because an app's activity died.
* @param app The app of the activity that died.
* @return result from removeHistoryRecordsForAppLocked.
*/
boolean handleAppDiedLocked(ProcessRecord app) {
if (mPausingActivity != null && mPausingActivity.app == app) {
if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG,
"App died while pausing: " + mPausingActivity);
mPausingActivity = null;
}
if (mLastPausedActivity != null && mLastPausedActivity.app == app) {
mLastPausedActivity = null;
mLastNoHistoryActivity = null;
}
return removeHistoryRecordsForAppLocked(app);
}
void handleAppCrashLocked(ProcessRecord app) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.app == app) {
Slog.w(TAG, " Force finishing activity 4 "
+ r.intent.getComponent().flattenToShortString());
// Force the destroy to skip right to removal.
r.app = null;
finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false);
}
}
}
}
boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll,
boolean dumpClient, String dumpPackage, boolean needSep, String header) {
boolean printed = false;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw,
mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll,
dumpClient, dumpPackage, needSep, header,
" Task id #" + task.taskId);
if (printed) {
header = null;
}
}
return printed;
}
ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) {
ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>();
if ("all".equals(name)) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
activities.addAll(mTaskHistory.get(taskNdx).mActivities);
}
} else if ("top".equals(name)) {
final int top = mTaskHistory.size() - 1;
if (top >= 0) {
final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities;
int listTop = list.size() - 1;
if (listTop >= 0) {
activities.add(list.get(listTop));
}
}
} else {
ItemMatcher matcher = new ItemMatcher();
matcher.build(name);
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) {
if (matcher.match(r1, r1.intent.getComponent())) {
activities.add(r1);
}
}
}
}
return activities;
}
ActivityRecord restartPackage(String packageName) {
ActivityRecord starting = topRunningActivityLocked(null);
// All activities that came from the package must be
// restarted as if there was a config change.
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord a = activities.get(activityNdx);
if (a.info.packageName.equals(packageName)) {
a.forceNewConfig = true;
if (starting != null && a == starting && a.visible) {
a.startFreezingScreenLocked(starting.app,
ActivityInfo.CONFIG_SCREEN_LAYOUT);
}
}
}
}
return starting;
}
void removeTask(TaskRecord task) {
mStackSupervisor.endLockTaskModeIfTaskEnding(task);
mWindowManager.removeTask(task.taskId);
final ActivityRecord r = mResumedActivity;
if (r != null && r.task == task) {
mResumedActivity = null;
}
final int taskNdx = mTaskHistory.indexOf(task);
final int topTaskNdx = mTaskHistory.size() - 1;
if (task.isOverHomeStack() && taskNdx < topTaskNdx) {
final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1);
if (!nextTask.isOverHomeStack()) {
nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE);
}
}
mTaskHistory.remove(task);
updateTaskMovement(task, true);
if (task.mActivities.isEmpty()) {
final boolean isVoiceSession = task.voiceSession != null;
if (isVoiceSession) {
try {
task.voiceSession.taskFinished(task.intent, task.taskId);
} catch (RemoteException e) {
}
}
if (task.autoRemoveFromRecents() || isVoiceSession) {
// Task creator asked to remove this when done, or this task was a voice
// interaction, so it should not remain on the recent tasks list.
mService.mRecentTasks.remove(task);
task.removedFromRecents();
}
}
if (mTaskHistory.isEmpty()) {
if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this);
if (isOnHomeDisplay()) {
mStackSupervisor.moveHomeStack(!isHomeStack());
}
if (mStacks != null) {
mStacks.remove(this);
mStacks.add(0, this);
}
mActivityContainer.onTaskListEmptyLocked();
}
}
TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent,
IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor,
boolean toTop) {
TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession,
voiceInteractor);
addTask(task, toTop, false);
return task;
}
ArrayList<TaskRecord> getAllTasks() {
return new ArrayList<TaskRecord>(mTaskHistory);
}
void addTask(final TaskRecord task, final boolean toTop, boolean moving) {
task.stack = this;
if (toTop) {
insertTaskAtTop(task);
} else {
mTaskHistory.add(0, task);
updateTaskMovement(task, false);
}
if (!moving && task.voiceSession != null) {
try {
task.voiceSession.taskStarted(task.intent, task.taskId);
} catch (RemoteException e) {
}
}
}
public int getStackId() {
return mStackId;
}
@Override
public String toString() {
return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this))
+ " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}";
}
}