| /* |
| * Copyright (C) 2008 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.internal.policy.impl; |
| |
| import android.app.ActivityManager; |
| import android.app.Dialog; |
| import android.app.StatusBarManager; |
| import android.content.BroadcastReceiver; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.res.Resources; |
| import android.content.pm.ActivityInfo; |
| import android.content.pm.PackageManager; |
| import android.content.pm.ResolveInfo; |
| import android.graphics.drawable.Drawable; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.view.View; |
| import android.view.Window; |
| import android.view.WindowManager; |
| import android.view.View.OnClickListener; |
| import android.widget.ImageView; |
| import android.widget.TextView; |
| |
| import java.util.List; |
| |
| public class RecentApplicationsDialog extends Dialog implements OnClickListener { |
| // Elements for debugging support |
| // private static final String LOG_TAG = "RecentApplicationsDialog"; |
| private static final boolean DBG_FORCE_EMPTY_LIST = false; |
| |
| static private StatusBarManager sStatusBar; |
| |
| private static final int NUM_BUTTONS = 6; |
| private static final int MAX_RECENT_TASKS = NUM_BUTTONS * 2; // allow for some discards |
| |
| final View[] mButtons = new View[NUM_BUTTONS]; |
| View mNoAppsText; |
| IntentFilter mBroadcastIntentFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS); |
| |
| private int mIconSize; |
| |
| public RecentApplicationsDialog(Context context) { |
| super(context); |
| |
| final Resources resources = context.getResources(); |
| mIconSize = (int) resources.getDimension(android.R.dimen.app_icon_size); |
| } |
| |
| /** |
| * We create the recent applications dialog just once, and it stays around (hidden) |
| * until activated by the user. |
| * |
| * @see MidWindowManager#showRecentAppsDialog |
| */ |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| Context context = getContext(); |
| |
| if (sStatusBar == null) { |
| sStatusBar = (StatusBarManager)context.getSystemService(Context.STATUS_BAR_SERVICE); |
| } |
| |
| Window theWindow = getWindow(); |
| theWindow.requestFeature(Window.FEATURE_NO_TITLE); |
| theWindow.setType(WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG); |
| theWindow.setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND, |
| WindowManager.LayoutParams.FLAG_BLUR_BEHIND); |
| theWindow.setTitle("Recents"); |
| |
| setContentView(com.android.internal.R.layout.recent_apps_dialog); |
| |
| mButtons[0] = findViewById(com.android.internal.R.id.button1); |
| mButtons[1] = findViewById(com.android.internal.R.id.button2); |
| mButtons[2] = findViewById(com.android.internal.R.id.button3); |
| mButtons[3] = findViewById(com.android.internal.R.id.button4); |
| mButtons[4] = findViewById(com.android.internal.R.id.button5); |
| mButtons[5] = findViewById(com.android.internal.R.id.button6); |
| mNoAppsText = findViewById(com.android.internal.R.id.no_applications_message); |
| |
| for (View b : mButtons) { |
| b.setOnClickListener(this); |
| } |
| } |
| |
| /** |
| * Handler for user clicks. If a button was clicked, launch the corresponding activity. |
| */ |
| public void onClick(View v) { |
| |
| for (View b : mButtons) { |
| if (b == v) { |
| // prepare a launch intent and send it |
| Intent intent = (Intent)b.getTag(); |
| getContext().startActivity(intent); |
| } |
| } |
| dismiss(); |
| } |
| |
| /** |
| * Set up and show the recent activities dialog. |
| */ |
| @Override |
| public void onStart() { |
| super.onStart(); |
| reloadButtons(); |
| if (sStatusBar != null) { |
| sStatusBar.disable(StatusBarManager.DISABLE_EXPAND); |
| } |
| |
| // receive broadcasts |
| getContext().registerReceiver(mBroadcastReceiver, mBroadcastIntentFilter); |
| } |
| |
| /** |
| * Dismiss the recent activities dialog. |
| */ |
| @Override |
| public void onStop() { |
| super.onStop(); |
| |
| // dump extra memory we're hanging on to |
| for (View b : mButtons) { |
| setButtonAppearance(b, null, null); |
| b.setTag(null); |
| } |
| |
| if (sStatusBar != null) { |
| sStatusBar.disable(StatusBarManager.DISABLE_NONE); |
| } |
| |
| // stop receiving broadcasts |
| getContext().unregisterReceiver(mBroadcastReceiver); |
| } |
| |
| /** |
| * Reload the 6 buttons with recent activities |
| */ |
| private void reloadButtons() { |
| |
| final Context context = getContext(); |
| final PackageManager pm = context.getPackageManager(); |
| final ActivityManager am = (ActivityManager) |
| context.getSystemService(Context.ACTIVITY_SERVICE); |
| final List<ActivityManager.RecentTaskInfo> recentTasks = |
| am.getRecentTasks(MAX_RECENT_TASKS, 0); |
| |
| ResolveInfo homeInfo = pm.resolveActivity( |
| new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME), |
| 0); |
| |
| // Performance note: Our android performance guide says to prefer Iterator when |
| // using a List class, but because we know that getRecentTasks() always returns |
| // an ArrayList<>, we'll use a simple index instead. |
| int button = 0; |
| int numTasks = recentTasks.size(); |
| for (int i = 0; i < numTasks && (button < NUM_BUTTONS); ++i) { |
| final ActivityManager.RecentTaskInfo info = recentTasks.get(i); |
| |
| // for debug purposes only, disallow first result to create empty lists |
| if (DBG_FORCE_EMPTY_LIST && (i == 0)) continue; |
| |
| Intent intent = new Intent(info.baseIntent); |
| if (info.origActivity != null) { |
| intent.setComponent(info.origActivity); |
| } |
| |
| // Skip the current home activity. |
| if (homeInfo != null) { |
| if (homeInfo.activityInfo.packageName.equals( |
| intent.getComponent().getPackageName()) |
| && homeInfo.activityInfo.name.equals( |
| intent.getComponent().getClassName())) { |
| continue; |
| } |
| } |
| |
| intent.setFlags((intent.getFlags()&~Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) |
| | Intent.FLAG_ACTIVITY_NEW_TASK); |
| final ResolveInfo resolveInfo = pm.resolveActivity(intent, 0); |
| if (resolveInfo != null) { |
| final ActivityInfo activityInfo = resolveInfo.activityInfo; |
| final String title = activityInfo.loadLabel(pm).toString(); |
| final Drawable icon = activityInfo.loadIcon(pm); |
| |
| if (title != null && title.length() > 0 && icon != null) { |
| final View b = mButtons[button]; |
| setButtonAppearance(b, title, icon); |
| b.setTag(intent); |
| b.setVisibility(View.VISIBLE); |
| b.setPressed(false); |
| b.clearFocus(); |
| ++button; |
| } |
| } |
| } |
| |
| // handle the case of "no icons to show" |
| mNoAppsText.setVisibility((button == 0) ? View.VISIBLE : View.GONE); |
| |
| // hide the rest |
| for ( ; button < NUM_BUTTONS; ++button) { |
| mButtons[button].setVisibility(View.GONE); |
| } |
| } |
| |
| /** |
| * Adjust appearance of each icon-button |
| */ |
| private void setButtonAppearance(View theButton, final String theTitle, final Drawable icon) { |
| TextView tv = (TextView) theButton; |
| tv.setText(theTitle); |
| if (icon != null) { |
| icon.setBounds(0, 0, mIconSize, mIconSize); |
| } |
| tv.setCompoundDrawables(null, icon, null, null); |
| } |
| |
| /** |
| * This is the listener for the ACTION_CLOSE_SYSTEM_DIALOGS intent. It's an indication that |
| * we should close ourselves immediately, in order to allow a higher-priority UI to take over |
| * (e.g. phone call received). |
| */ |
| private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| String action = intent.getAction(); |
| if (Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action)) { |
| String reason = intent.getStringExtra(MidWindowManager.SYSTEM_DIALOG_REASON_KEY); |
| if (! MidWindowManager.SYSTEM_DIALOG_REASON_RECENT_APPS.equals(reason)) { |
| dismiss(); |
| } |
| } |
| } |
| }; |
| } |