| /* |
| * Copyright (C) 2007 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; |
| |
| import android.app.AlarmManager; |
| import android.app.PendingIntent; |
| import android.appwidget.AppWidgetManager; |
| import android.appwidget.AppWidgetProviderInfo; |
| import android.content.BroadcastReceiver; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.ActivityInfo; |
| import android.content.pm.PackageManager; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.ResolveInfo; |
| import android.content.res.TypedArray; |
| import android.content.res.XmlResourceParser; |
| import android.net.Uri; |
| import android.os.Binder; |
| import android.os.Bundle; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.util.TypedValue; |
| import android.util.Xml; |
| import android.widget.RemoteViews; |
| |
| import java.io.IOException; |
| import java.io.File; |
| import java.io.FileDescriptor; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| |
| import com.android.internal.appwidget.IAppWidgetService; |
| import com.android.internal.appwidget.IAppWidgetHost; |
| import com.android.internal.util.FastXmlSerializer; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| import org.xmlpull.v1.XmlSerializer; |
| |
| class AppWidgetService extends IAppWidgetService.Stub |
| { |
| private static final String TAG = "AppWidgetService"; |
| |
| private static final String SETTINGS_FILENAME = "appwidgets.xml"; |
| private static final String SETTINGS_TMP_FILENAME = SETTINGS_FILENAME + ".tmp"; |
| |
| /* |
| * When identifying a Host or Provider based on the calling process, use the uid field. |
| * When identifying a Host or Provider based on a package manager broadcast, use the |
| * package given. |
| */ |
| |
| static class Provider { |
| int uid; |
| AppWidgetProviderInfo info; |
| ArrayList<AppWidgetId> instances = new ArrayList<AppWidgetId>(); |
| PendingIntent broadcast; |
| boolean zombie; // if we're in safe mode, don't prune this just because nobody references it |
| |
| int tag; // for use while saving state (the index) |
| } |
| |
| static class Host { |
| int uid; |
| int hostId; |
| String packageName; |
| ArrayList<AppWidgetId> instances = new ArrayList<AppWidgetId>(); |
| IAppWidgetHost callbacks; |
| boolean zombie; // if we're in safe mode, don't prune this just because nobody references it |
| |
| int tag; // for use while saving state (the index) |
| } |
| |
| static class AppWidgetId { |
| int appWidgetId; |
| Provider provider; |
| RemoteViews views; |
| Host host; |
| } |
| |
| Context mContext; |
| PackageManager mPackageManager; |
| AlarmManager mAlarmManager; |
| ArrayList<Provider> mInstalledProviders = new ArrayList<Provider>(); |
| int mNextAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID + 1; |
| final ArrayList<AppWidgetId> mAppWidgetIds = new ArrayList<AppWidgetId>(); |
| ArrayList<Host> mHosts = new ArrayList<Host>(); |
| boolean mSafeMode; |
| |
| AppWidgetService(Context context) { |
| mContext = context; |
| mPackageManager = context.getPackageManager(); |
| mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE); |
| } |
| |
| public void systemReady(boolean safeMode) { |
| mSafeMode = safeMode; |
| |
| loadAppWidgetList(); |
| loadStateLocked(); |
| |
| // Register for the boot completed broadcast, so we can send the |
| // ENABLE broacasts. If we try to send them now, they time out, |
| // because the system isn't ready to handle them yet. |
| mContext.registerReceiver(mBroadcastReceiver, |
| new IntentFilter(Intent.ACTION_BOOT_COMPLETED), null, null); |
| |
| // Register for broadcasts about package install, etc., so we can |
| // update the provider list. |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(Intent.ACTION_PACKAGE_ADDED); |
| filter.addAction(Intent.ACTION_PACKAGE_REMOVED); |
| filter.addDataScheme("package"); |
| mContext.registerReceiver(mBroadcastReceiver, filter); |
| } |
| |
| @Override |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) |
| != PackageManager.PERMISSION_GRANTED) { |
| pw.println("Permission Denial: can't dump from from pid=" |
| + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid()); |
| return; |
| } |
| |
| synchronized (mAppWidgetIds) { |
| int N = mInstalledProviders.size(); |
| pw.println("Providers:"); |
| for (int i=0; i<N; i++) { |
| Provider p = mInstalledProviders.get(i); |
| AppWidgetProviderInfo info = p.info; |
| pw.print(" ["); pw.print(i); pw.print("] provider "); |
| pw.print(info.provider.flattenToShortString()); |
| pw.println(':'); |
| pw.print(" min=("); pw.print(info.minWidth); |
| pw.print("x"); pw.print(info.minHeight); |
| pw.print(") updatePeriodMillis="); |
| pw.print(info.updatePeriodMillis); |
| pw.print(" initialLayout=#"); |
| pw.print(Integer.toHexString(info.initialLayout)); |
| pw.print(" zombie="); pw.println(p.zombie); |
| } |
| |
| N = mAppWidgetIds.size(); |
| pw.println(" "); |
| pw.println("AppWidgetIds:"); |
| for (int i=0; i<N; i++) { |
| AppWidgetId id = mAppWidgetIds.get(i); |
| pw.print(" ["); pw.print(i); pw.print("] id="); |
| pw.println(id.appWidgetId); |
| pw.print(" hostId="); |
| pw.print(id.host.hostId); pw.print(' '); |
| pw.print(id.host.packageName); pw.print('/'); |
| pw.println(id.host.uid); |
| if (id.provider != null) { |
| pw.print(" provider="); |
| pw.println(id.provider.info.provider.flattenToShortString()); |
| } |
| if (id.host != null) { |
| pw.print(" host.callbacks="); pw.println(id.host.callbacks); |
| } |
| if (id.views != null) { |
| pw.print(" views="); pw.println(id.views); |
| } |
| } |
| |
| N = mHosts.size(); |
| pw.println(" "); |
| pw.println("Hosts:"); |
| for (int i=0; i<N; i++) { |
| Host host = mHosts.get(i); |
| pw.print(" ["); pw.print(i); pw.print("] hostId="); |
| pw.print(host.hostId); pw.print(' '); |
| pw.print(host.packageName); pw.print('/'); |
| pw.print(host.uid); pw.println(':'); |
| pw.print(" callbacks="); pw.println(host.callbacks); |
| pw.print(" instances.size="); pw.print(host.instances.size()); |
| pw.print(" zombie="); pw.println(host.zombie); |
| } |
| } |
| } |
| |
| public int allocateAppWidgetId(String packageName, int hostId) { |
| int callingUid = enforceCallingUid(packageName); |
| synchronized (mAppWidgetIds) { |
| int appWidgetId = mNextAppWidgetId++; |
| |
| Host host = lookupOrAddHostLocked(callingUid, packageName, hostId); |
| |
| AppWidgetId id = new AppWidgetId(); |
| id.appWidgetId = appWidgetId; |
| id.host = host; |
| |
| host.instances.add(id); |
| mAppWidgetIds.add(id); |
| |
| saveStateLocked(); |
| |
| return appWidgetId; |
| } |
| } |
| |
| public void deleteAppWidgetId(int appWidgetId) { |
| synchronized (mAppWidgetIds) { |
| AppWidgetId id = lookupAppWidgetIdLocked(appWidgetId); |
| if (id != null) { |
| deleteAppWidgetLocked(id); |
| saveStateLocked(); |
| } |
| } |
| } |
| |
| public void deleteHost(int hostId) { |
| synchronized (mAppWidgetIds) { |
| int callingUid = getCallingUid(); |
| Host host = lookupHostLocked(callingUid, hostId); |
| if (host != null) { |
| deleteHostLocked(host); |
| saveStateLocked(); |
| } |
| } |
| } |
| |
| public void deleteAllHosts() { |
| synchronized (mAppWidgetIds) { |
| int callingUid = getCallingUid(); |
| final int N = mHosts.size(); |
| boolean changed = false; |
| for (int i=N-1; i>=0; i--) { |
| Host host = mHosts.get(i); |
| if (host.uid == callingUid) { |
| deleteHostLocked(host); |
| changed = true; |
| } |
| } |
| if (changed) { |
| saveStateLocked(); |
| } |
| } |
| } |
| |
| void deleteHostLocked(Host host) { |
| final int N = host.instances.size(); |
| for (int i=N-1; i>=0; i--) { |
| AppWidgetId id = host.instances.get(i); |
| deleteAppWidgetLocked(id); |
| } |
| host.instances.clear(); |
| mHosts.remove(host); |
| // it's gone or going away, abruptly drop the callback connection |
| host.callbacks = null; |
| } |
| |
| void deleteAppWidgetLocked(AppWidgetId id) { |
| Host host = id.host; |
| host.instances.remove(id); |
| pruneHostLocked(host); |
| |
| mAppWidgetIds.remove(id); |
| |
| Provider p = id.provider; |
| if (p != null) { |
| p.instances.remove(id); |
| if (!p.zombie) { |
| // send the broacast saying that this appWidgetId has been deleted |
| Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_DELETED); |
| intent.setComponent(p.info.provider); |
| intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, id.appWidgetId); |
| mContext.sendBroadcast(intent); |
| if (p.instances.size() == 0) { |
| // cancel the future updates |
| cancelBroadcasts(p); |
| |
| // send the broacast saying that the provider is not in use any more |
| intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_DISABLED); |
| intent.setComponent(p.info.provider); |
| mContext.sendBroadcast(intent); |
| } |
| } |
| } |
| } |
| |
| void cancelBroadcasts(Provider p) { |
| if (p.broadcast != null) { |
| mAlarmManager.cancel(p.broadcast); |
| long token = Binder.clearCallingIdentity(); |
| try { |
| p.broadcast.cancel(); |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| p.broadcast = null; |
| } |
| } |
| |
| public void bindAppWidgetId(int appWidgetId, ComponentName provider) { |
| mContext.enforceCallingPermission(android.Manifest.permission.BIND_APPWIDGET, |
| "bindGagetId appWidgetId=" + appWidgetId + " provider=" + provider); |
| synchronized (mAppWidgetIds) { |
| AppWidgetId id = lookupAppWidgetIdLocked(appWidgetId); |
| if (id == null) { |
| throw new IllegalArgumentException("bad appWidgetId"); |
| } |
| if (id.provider != null) { |
| throw new IllegalArgumentException("appWidgetId " + appWidgetId + " already bound to " |
| + id.provider.info.provider); |
| } |
| Provider p = lookupProviderLocked(provider); |
| if (p == null) { |
| throw new IllegalArgumentException("not a appwidget provider: " + provider); |
| } |
| if (p.zombie) { |
| throw new IllegalArgumentException("can't bind to a 3rd party provider in" |
| + " safe mode: " + provider); |
| } |
| |
| id.provider = p; |
| p.instances.add(id); |
| int instancesSize = p.instances.size(); |
| if (instancesSize == 1) { |
| // tell the provider that it's ready |
| sendEnableIntentLocked(p); |
| } |
| |
| // send an update now -- We need this update now, and just for this appWidgetId. |
| // It's less critical when the next one happens, so when we schdule the next one, |
| // we add updatePeriodMillis to its start time. That time will have some slop, |
| // but that's okay. |
| sendUpdateIntentLocked(p, new int[] { appWidgetId }); |
| |
| // schedule the future updates |
| registerForBroadcastsLocked(p, getAppWidgetIds(p)); |
| saveStateLocked(); |
| } |
| } |
| |
| public AppWidgetProviderInfo getAppWidgetInfo(int appWidgetId) { |
| synchronized (mAppWidgetIds) { |
| AppWidgetId id = lookupAppWidgetIdLocked(appWidgetId); |
| if (id != null && id.provider != null && !id.provider.zombie) { |
| return id.provider.info; |
| } |
| return null; |
| } |
| } |
| |
| public RemoteViews getAppWidgetViews(int appWidgetId) { |
| synchronized (mAppWidgetIds) { |
| AppWidgetId id = lookupAppWidgetIdLocked(appWidgetId); |
| if (id != null) { |
| return id.views; |
| } |
| return null; |
| } |
| } |
| |
| public List<AppWidgetProviderInfo> getInstalledProviders() { |
| synchronized (mAppWidgetIds) { |
| final int N = mInstalledProviders.size(); |
| ArrayList<AppWidgetProviderInfo> result = new ArrayList<AppWidgetProviderInfo>(N); |
| for (int i=0; i<N; i++) { |
| Provider p = mInstalledProviders.get(i); |
| if (!p.zombie) { |
| result.add(p.info); |
| } |
| } |
| return result; |
| } |
| } |
| |
| public void updateAppWidgetIds(int[] appWidgetIds, RemoteViews views) { |
| if (appWidgetIds == null) { |
| return; |
| } |
| if (appWidgetIds.length == 0) { |
| return; |
| } |
| final int N = appWidgetIds.length; |
| |
| synchronized (mAppWidgetIds) { |
| for (int i=0; i<N; i++) { |
| AppWidgetId id = lookupAppWidgetIdLocked(appWidgetIds[i]); |
| updateAppWidgetInstanceLocked(id, views); |
| } |
| } |
| } |
| |
| public void updateAppWidgetProvider(ComponentName provider, RemoteViews views) { |
| synchronized (mAppWidgetIds) { |
| Provider p = lookupProviderLocked(provider); |
| if (p == null) { |
| Log.w(TAG, "updateAppWidgetProvider: provider doesn't exist: " + provider); |
| return; |
| } |
| ArrayList<AppWidgetId> instances = p.instances; |
| final int N = instances.size(); |
| for (int i=0; i<N; i++) { |
| AppWidgetId id = instances.get(i); |
| updateAppWidgetInstanceLocked(id, views); |
| } |
| } |
| } |
| |
| void updateAppWidgetInstanceLocked(AppWidgetId id, RemoteViews views) { |
| // allow for stale appWidgetIds and other badness |
| // lookup also checks that the calling process can access the appWidgetId |
| // drop unbound appWidgetIds (shouldn't be possible under normal circumstances) |
| if (id != null && id.provider != null && !id.provider.zombie && !id.host.zombie) { |
| id.views = views; |
| |
| // is anyone listening? |
| if (id.host.callbacks != null) { |
| try { |
| // the lock is held, but this is a oneway call |
| id.host.callbacks.updateAppWidget(id.appWidgetId, views); |
| } catch (RemoteException e) { |
| // It failed; remove the callback. No need to prune because |
| // we know that this host is still referenced by this instance. |
| id.host.callbacks = null; |
| } |
| } |
| } |
| } |
| |
| public int[] startListening(IAppWidgetHost callbacks, String packageName, int hostId, |
| List<RemoteViews> updatedViews) { |
| int callingUid = enforceCallingUid(packageName); |
| synchronized (mAppWidgetIds) { |
| Host host = lookupOrAddHostLocked(callingUid, packageName, hostId); |
| host.callbacks = callbacks; |
| |
| updatedViews.clear(); |
| |
| ArrayList<AppWidgetId> instances = host.instances; |
| int N = instances.size(); |
| int[] updatedIds = new int[N]; |
| for (int i=0; i<N; i++) { |
| AppWidgetId id = instances.get(i); |
| updatedIds[i] = id.appWidgetId; |
| updatedViews.add(id.views); |
| } |
| return updatedIds; |
| } |
| } |
| |
| public void stopListening(int hostId) { |
| synchronized (mAppWidgetIds) { |
| Host host = lookupHostLocked(getCallingUid(), hostId); |
| host.callbacks = null; |
| pruneHostLocked(host); |
| } |
| } |
| |
| boolean canAccessAppWidgetId(AppWidgetId id, int callingUid) { |
| if (id.host.uid == callingUid) { |
| // Apps hosting the AppWidget have access to it. |
| return true; |
| } |
| if (id.provider != null && id.provider.uid == callingUid) { |
| // Apps providing the AppWidget have access to it (if the appWidgetId has been bound) |
| return true; |
| } |
| if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.BIND_APPWIDGET) |
| == PackageManager.PERMISSION_GRANTED) { |
| // Apps that can bind have access to all appWidgetIds. |
| return true; |
| } |
| // Nobody else can access it. |
| return false; |
| } |
| |
| AppWidgetId lookupAppWidgetIdLocked(int appWidgetId) { |
| int callingUid = getCallingUid(); |
| final int N = mAppWidgetIds.size(); |
| for (int i=0; i<N; i++) { |
| AppWidgetId id = mAppWidgetIds.get(i); |
| if (id.appWidgetId == appWidgetId && canAccessAppWidgetId(id, callingUid)) { |
| return id; |
| } |
| } |
| return null; |
| } |
| |
| Provider lookupProviderLocked(ComponentName provider) { |
| final int N = mInstalledProviders.size(); |
| for (int i=0; i<N; i++) { |
| Provider p = mInstalledProviders.get(i); |
| if (p.info.provider.equals(provider)) { |
| return p; |
| } |
| } |
| return null; |
| } |
| |
| Host lookupHostLocked(int uid, int hostId) { |
| final int N = mHosts.size(); |
| for (int i=0; i<N; i++) { |
| Host h = mHosts.get(i); |
| if (h.uid == uid && h.hostId == hostId) { |
| return h; |
| } |
| } |
| return null; |
| } |
| |
| Host lookupOrAddHostLocked(int uid, String packageName, int hostId) { |
| final int N = mHosts.size(); |
| for (int i=0; i<N; i++) { |
| Host h = mHosts.get(i); |
| if (h.hostId == hostId && h.packageName.equals(packageName)) { |
| return h; |
| } |
| } |
| Host host = new Host(); |
| host.packageName = packageName; |
| host.uid = uid; |
| host.hostId = hostId; |
| mHosts.add(host); |
| return host; |
| } |
| |
| void pruneHostLocked(Host host) { |
| if (host.instances.size() == 0 && host.callbacks == null) { |
| mHosts.remove(host); |
| } |
| } |
| |
| void loadAppWidgetList() { |
| PackageManager pm = mPackageManager; |
| |
| Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); |
| List<ResolveInfo> broadcastReceivers = pm.queryBroadcastReceivers(intent, |
| PackageManager.GET_META_DATA); |
| |
| final int N = broadcastReceivers.size(); |
| for (int i=0; i<N; i++) { |
| ResolveInfo ri = broadcastReceivers.get(i); |
| addProviderLocked(ri); |
| } |
| } |
| |
| boolean addProviderLocked(ResolveInfo ri) { |
| Provider p = parseProviderInfoXml(new ComponentName(ri.activityInfo.packageName, |
| ri.activityInfo.name), ri); |
| if (p != null) { |
| mInstalledProviders.add(p); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| void removeProviderLocked(int index, Provider p) { |
| int N = p.instances.size(); |
| for (int i=0; i<N; i++) { |
| AppWidgetId id = p.instances.get(i); |
| // Call back with empty RemoteViews |
| updateAppWidgetInstanceLocked(id, null); |
| // Stop telling the host about updates for this from now on |
| cancelBroadcasts(p); |
| // clear out references to this appWidgetId |
| id.host.instances.remove(id); |
| mAppWidgetIds.remove(id); |
| id.provider = null; |
| pruneHostLocked(id.host); |
| id.host = null; |
| } |
| p.instances.clear(); |
| mInstalledProviders.remove(index); |
| // no need to send the DISABLE broadcast, since the receiver is gone anyway |
| cancelBroadcasts(p); |
| } |
| |
| void sendEnableIntentLocked(Provider p) { |
| Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_ENABLED); |
| intent.setComponent(p.info.provider); |
| mContext.sendBroadcast(intent); |
| } |
| |
| void sendUpdateIntentLocked(Provider p, int[] appWidgetIds) { |
| if (appWidgetIds != null && appWidgetIds.length > 0) { |
| Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); |
| intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds); |
| intent.setComponent(p.info.provider); |
| mContext.sendBroadcast(intent); |
| } |
| } |
| |
| void registerForBroadcastsLocked(Provider p, int[] appWidgetIds) { |
| if (p.info.updatePeriodMillis > 0) { |
| // if this is the first instance, set the alarm. otherwise, |
| // rely on the fact that we've already set it and that |
| // PendingIntent.getBroadcast will update the extras. |
| boolean alreadyRegistered = p.broadcast != null; |
| Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); |
| intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds); |
| intent.setComponent(p.info.provider); |
| long token = Binder.clearCallingIdentity(); |
| try { |
| p.broadcast = PendingIntent.getBroadcast(mContext, 1, intent, |
| PendingIntent.FLAG_UPDATE_CURRENT); |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| if (!alreadyRegistered) { |
| mAlarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, |
| SystemClock.elapsedRealtime() + p.info.updatePeriodMillis, |
| p.info.updatePeriodMillis, p.broadcast); |
| } |
| } |
| } |
| |
| static int[] getAppWidgetIds(Provider p) { |
| int instancesSize = p.instances.size(); |
| int appWidgetIds[] = new int[instancesSize]; |
| for (int i=0; i<instancesSize; i++) { |
| appWidgetIds[i] = p.instances.get(i).appWidgetId; |
| } |
| return appWidgetIds; |
| } |
| |
| public int[] getAppWidgetIds(ComponentName provider) { |
| synchronized (mAppWidgetIds) { |
| Provider p = lookupProviderLocked(provider); |
| if (p != null && getCallingUid() == p.uid) { |
| return getAppWidgetIds(p); |
| } else { |
| return new int[0]; |
| } |
| } |
| } |
| |
| private Provider parseProviderInfoXml(ComponentName component, ResolveInfo ri) { |
| Provider p = null; |
| |
| ActivityInfo activityInfo = ri.activityInfo; |
| XmlResourceParser parser = null; |
| try { |
| parser = activityInfo.loadXmlMetaData(mPackageManager, |
| AppWidgetManager.META_DATA_APPWIDGET_PROVIDER); |
| if (parser == null) { |
| Log.w(TAG, "No " + AppWidgetManager.META_DATA_APPWIDGET_PROVIDER + " meta-data for " |
| + "AppWidget provider '" + component + '\''); |
| return null; |
| } |
| |
| AttributeSet attrs = Xml.asAttributeSet(parser); |
| |
| int type; |
| while ((type=parser.next()) != XmlPullParser.END_DOCUMENT |
| && type != XmlPullParser.START_TAG) { |
| // drain whitespace, comments, etc. |
| } |
| |
| String nodeName = parser.getName(); |
| if (!"appwidget-provider".equals(nodeName)) { |
| Log.w(TAG, "Meta-data does not start with appwidget-provider tag for" |
| + " AppWidget provider '" + component + '\''); |
| return null; |
| } |
| |
| p = new Provider(); |
| AppWidgetProviderInfo info = p.info = new AppWidgetProviderInfo(); |
| |
| info.provider = component; |
| p.uid = activityInfo.applicationInfo.uid; |
| |
| TypedArray sa = mContext.getResources().obtainAttributes(attrs, |
| com.android.internal.R.styleable.AppWidgetProviderInfo); |
| |
| // These dimensions has to be resolved in the application's context. |
| // We simply send back the raw complex data, which will be |
| // converted to dp in {@link AppWidgetManager#getAppWidgetInfo}. |
| TypedValue value = sa.peekValue( |
| com.android.internal.R.styleable.AppWidgetProviderInfo_minWidth); |
| info.minWidth = value != null ? value.data : 0; |
| value = sa.peekValue(com.android.internal.R.styleable.AppWidgetProviderInfo_minHeight); |
| info.minHeight = value != null ? value.data : 0; |
| |
| info.updatePeriodMillis = sa.getInt( |
| com.android.internal.R.styleable.AppWidgetProviderInfo_updatePeriodMillis, 0); |
| info.initialLayout = sa.getResourceId( |
| com.android.internal.R.styleable.AppWidgetProviderInfo_initialLayout, 0); |
| String className = sa.getString( |
| com.android.internal.R.styleable.AppWidgetProviderInfo_configure); |
| if (className != null) { |
| info.configure = new ComponentName(component.getPackageName(), className); |
| } |
| info.label = activityInfo.loadLabel(mPackageManager).toString(); |
| info.icon = ri.getIconResource(); |
| sa.recycle(); |
| } catch (Exception e) { |
| // Ok to catch Exception here, because anything going wrong because |
| // of what a client process passes to us should not be fatal for the |
| // system process. |
| Log.w(TAG, "XML parsing failed for AppWidget provider '" + component + '\'', e); |
| return null; |
| } finally { |
| if (parser != null) parser.close(); |
| } |
| return p; |
| } |
| |
| int getUidForPackage(String packageName) throws PackageManager.NameNotFoundException { |
| PackageInfo pkgInfo = mPackageManager.getPackageInfo(packageName, 0); |
| if (pkgInfo == null || pkgInfo.applicationInfo == null) { |
| throw new PackageManager.NameNotFoundException(); |
| } |
| return pkgInfo.applicationInfo.uid; |
| } |
| |
| int enforceCallingUid(String packageName) throws IllegalArgumentException { |
| int callingUid = getCallingUid(); |
| int packageUid; |
| try { |
| packageUid = getUidForPackage(packageName); |
| } catch (PackageManager.NameNotFoundException ex) { |
| throw new IllegalArgumentException("packageName and uid don't match packageName=" |
| + packageName); |
| } |
| if (callingUid != packageUid && Process.supportsProcesses()) { |
| throw new IllegalArgumentException("packageName and uid don't match packageName=" |
| + packageName); |
| } |
| return callingUid; |
| } |
| |
| void sendInitialBroadcasts() { |
| synchronized (mAppWidgetIds) { |
| final int N = mInstalledProviders.size(); |
| for (int i=0; i<N; i++) { |
| Provider p = mInstalledProviders.get(i); |
| if (p.instances.size() > 0) { |
| sendEnableIntentLocked(p); |
| int[] appWidgetIds = getAppWidgetIds(p); |
| sendUpdateIntentLocked(p, appWidgetIds); |
| registerForBroadcastsLocked(p, appWidgetIds); |
| } |
| } |
| } |
| } |
| |
| // only call from initialization -- it assumes that the data structures are all empty |
| void loadStateLocked() { |
| File temp = savedStateTempFile(); |
| File real = savedStateRealFile(); |
| |
| // prefer the real file. If it doesn't exist, use the temp one, and then copy it to the |
| // real one. if there is both a real file and a temp one, assume that the temp one isn't |
| // fully written and delete it. |
| if (real.exists()) { |
| readStateFromFileLocked(real); |
| if (temp.exists()) { |
| //noinspection ResultOfMethodCallIgnored |
| temp.delete(); |
| } |
| } else if (temp.exists()) { |
| readStateFromFileLocked(temp); |
| //noinspection ResultOfMethodCallIgnored |
| temp.renameTo(real); |
| } |
| } |
| |
| void saveStateLocked() { |
| File temp = savedStateTempFile(); |
| File real = savedStateRealFile(); |
| |
| if (!real.exists()) { |
| // If the real one doesn't exist, it's either because this is the first time |
| // or because something went wrong while copying them. In this case, we can't |
| // trust anything that's in temp. In order to have the loadState code not |
| // use the temporary one until it's fully written, create an empty file |
| // for real, which will we'll shortly delete. |
| try { |
| //noinspection ResultOfMethodCallIgnored |
| real.createNewFile(); |
| } catch (IOException e) { |
| // Ignore |
| } |
| } |
| |
| if (temp.exists()) { |
| //noinspection ResultOfMethodCallIgnored |
| temp.delete(); |
| } |
| |
| writeStateToFileLocked(temp); |
| |
| //noinspection ResultOfMethodCallIgnored |
| real.delete(); |
| //noinspection ResultOfMethodCallIgnored |
| temp.renameTo(real); |
| } |
| |
| void writeStateToFileLocked(File file) { |
| FileOutputStream stream = null; |
| int N; |
| |
| try { |
| stream = new FileOutputStream(file, false); |
| XmlSerializer out = new FastXmlSerializer(); |
| out.setOutput(stream, "utf-8"); |
| out.startDocument(null, true); |
| |
| |
| out.startTag(null, "gs"); |
| |
| int providerIndex = 0; |
| N = mInstalledProviders.size(); |
| for (int i=0; i<N; i++) { |
| Provider p = mInstalledProviders.get(i); |
| if (p.instances.size() > 0) { |
| out.startTag(null, "p"); |
| out.attribute(null, "pkg", p.info.provider.getPackageName()); |
| out.attribute(null, "cl", p.info.provider.getClassName()); |
| out.endTag(null, "h"); |
| p.tag = providerIndex; |
| providerIndex++; |
| } |
| } |
| |
| N = mHosts.size(); |
| for (int i=0; i<N; i++) { |
| Host host = mHosts.get(i); |
| out.startTag(null, "h"); |
| out.attribute(null, "pkg", host.packageName); |
| out.attribute(null, "id", Integer.toHexString(host.hostId)); |
| out.endTag(null, "h"); |
| host.tag = i; |
| } |
| |
| N = mAppWidgetIds.size(); |
| for (int i=0; i<N; i++) { |
| AppWidgetId id = mAppWidgetIds.get(i); |
| out.startTag(null, "g"); |
| out.attribute(null, "id", Integer.toHexString(id.appWidgetId)); |
| out.attribute(null, "h", Integer.toHexString(id.host.tag)); |
| if (id.provider != null) { |
| out.attribute(null, "p", Integer.toHexString(id.provider.tag)); |
| } |
| out.endTag(null, "g"); |
| } |
| |
| out.endTag(null, "gs"); |
| |
| out.endDocument(); |
| stream.close(); |
| } catch (IOException e) { |
| try { |
| if (stream != null) { |
| stream.close(); |
| } |
| } catch (IOException ex) { |
| // Ignore |
| } |
| if (file.exists()) { |
| //noinspection ResultOfMethodCallIgnored |
| file.delete(); |
| } |
| } |
| } |
| |
| void readStateFromFileLocked(File file) { |
| FileInputStream stream = null; |
| |
| boolean success = false; |
| |
| try { |
| stream = new FileInputStream(file); |
| XmlPullParser parser = Xml.newPullParser(); |
| parser.setInput(stream, null); |
| |
| int type; |
| int providerIndex = 0; |
| HashMap<Integer,Provider> loadedProviders = new HashMap<Integer, Provider>(); |
| do { |
| type = parser.next(); |
| if (type == XmlPullParser.START_TAG) { |
| String tag = parser.getName(); |
| if ("p".equals(tag)) { |
| // TODO: do we need to check that this package has the same signature |
| // as before? |
| String pkg = parser.getAttributeValue(null, "pkg"); |
| String cl = parser.getAttributeValue(null, "cl"); |
| Provider p = lookupProviderLocked(new ComponentName(pkg, cl)); |
| if (p == null && mSafeMode) { |
| // if we're in safe mode, make a temporary one |
| p = new Provider(); |
| p.info = new AppWidgetProviderInfo(); |
| p.info.provider = new ComponentName(pkg, cl); |
| p.zombie = true; |
| mInstalledProviders.add(p); |
| } |
| if (p != null) { |
| // if it wasn't uninstalled or something |
| loadedProviders.put(providerIndex, p); |
| } |
| providerIndex++; |
| } |
| else if ("h".equals(tag)) { |
| Host host = new Host(); |
| |
| // TODO: do we need to check that this package has the same signature |
| // as before? |
| host.packageName = parser.getAttributeValue(null, "pkg"); |
| try { |
| host.uid = getUidForPackage(host.packageName); |
| } catch (PackageManager.NameNotFoundException ex) { |
| host.zombie = true; |
| } |
| if (!host.zombie || mSafeMode) { |
| // In safe mode, we don't discard the hosts we don't recognize |
| // so that they're not pruned from our list. Otherwise, we do. |
| host.hostId = Integer.parseInt( |
| parser.getAttributeValue(null, "id"), 16); |
| mHosts.add(host); |
| } |
| } |
| else if ("g".equals(tag)) { |
| AppWidgetId id = new AppWidgetId(); |
| id.appWidgetId = Integer.parseInt(parser.getAttributeValue(null, "id"), 16); |
| if (id.appWidgetId >= mNextAppWidgetId) { |
| mNextAppWidgetId = id.appWidgetId + 1; |
| } |
| |
| String providerString = parser.getAttributeValue(null, "p"); |
| if (providerString != null) { |
| // there's no provider if it hasn't been bound yet. |
| // maybe we don't have to save this, but it brings the system |
| // to the state it was in. |
| int pIndex = Integer.parseInt(providerString, 16); |
| id.provider = loadedProviders.get(pIndex); |
| if (false) { |
| Log.d(TAG, "bound appWidgetId=" + id.appWidgetId + " to provider " |
| + pIndex + " which is " + id.provider); |
| } |
| if (id.provider == null) { |
| // This provider is gone. We just let the host figure out |
| // that this happened when it fails to load it. |
| continue; |
| } |
| } |
| |
| int hIndex = Integer.parseInt(parser.getAttributeValue(null, "h"), 16); |
| id.host = mHosts.get(hIndex); |
| if (id.host == null) { |
| // This host is gone. |
| continue; |
| } |
| |
| if (id.provider != null) { |
| id.provider.instances.add(id); |
| } |
| id.host.instances.add(id); |
| mAppWidgetIds.add(id); |
| } |
| } |
| } while (type != XmlPullParser.END_DOCUMENT); |
| success = true; |
| } catch (NullPointerException e) { |
| Log.w(TAG, "failed parsing " + file, e); |
| } catch (NumberFormatException e) { |
| Log.w(TAG, "failed parsing " + file, e); |
| } catch (XmlPullParserException e) { |
| Log.w(TAG, "failed parsing " + file, e); |
| } catch (IOException e) { |
| Log.w(TAG, "failed parsing " + file, e); |
| } catch (IndexOutOfBoundsException e) { |
| Log.w(TAG, "failed parsing " + file, e); |
| } |
| try { |
| if (stream != null) { |
| stream.close(); |
| } |
| } catch (IOException e) { |
| // Ignore |
| } |
| |
| if (success) { |
| // delete any hosts that didn't manage to get connected (should happen) |
| // if it matters, they'll be reconnected. |
| final int N = mHosts.size(); |
| for (int i=0; i<N; i++) { |
| pruneHostLocked(mHosts.get(i)); |
| } |
| } else { |
| // failed reading, clean up |
| mAppWidgetIds.clear(); |
| mHosts.clear(); |
| final int N = mInstalledProviders.size(); |
| for (int i=0; i<N; i++) { |
| mInstalledProviders.get(i).instances.clear(); |
| } |
| } |
| } |
| |
| File savedStateTempFile() { |
| return new File("/data/system/" + SETTINGS_TMP_FILENAME); |
| //return new File(mContext.getFilesDir(), SETTINGS_FILENAME); |
| } |
| |
| File savedStateRealFile() { |
| return new File("/data/system/" + SETTINGS_FILENAME); |
| //return new File(mContext.getFilesDir(), SETTINGS_TMP_FILENAME); |
| } |
| |
| BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| public void onReceive(Context context, Intent intent) { |
| String action = intent.getAction(); |
| //Log.d(TAG, "received " + action); |
| if (Intent.ACTION_BOOT_COMPLETED.equals(action)) { |
| sendInitialBroadcasts(); |
| } else { |
| Uri uri = intent.getData(); |
| if (uri == null) { |
| return; |
| } |
| String pkgName = uri.getSchemeSpecificPart(); |
| if (pkgName == null) { |
| return; |
| } |
| |
| if (Intent.ACTION_PACKAGE_ADDED.equals(action)) { |
| synchronized (mAppWidgetIds) { |
| Bundle extras = intent.getExtras(); |
| if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) { |
| // The package was just upgraded |
| updateProvidersForPackageLocked(pkgName); |
| } else { |
| // The package was just added |
| addProvidersForPackageLocked(pkgName); |
| } |
| saveStateLocked(); |
| } |
| } |
| else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) { |
| Bundle extras = intent.getExtras(); |
| if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) { |
| // The package is being updated. We'll receive a PACKAGE_ADDED shortly. |
| } else { |
| synchronized (mAppWidgetIds) { |
| removeProvidersForPackageLocked(pkgName); |
| saveStateLocked(); |
| } |
| } |
| } |
| } |
| } |
| }; |
| |
| // TODO: If there's a better way of matching an intent filter against the |
| // packages for a given package, use that. |
| void addProvidersForPackageLocked(String pkgName) { |
| Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); |
| List<ResolveInfo> broadcastReceivers = mPackageManager.queryBroadcastReceivers(intent, |
| PackageManager.GET_META_DATA); |
| |
| final int N = broadcastReceivers.size(); |
| for (int i=0; i<N; i++) { |
| ResolveInfo ri = broadcastReceivers.get(i); |
| ActivityInfo ai = ri.activityInfo; |
| |
| if (pkgName.equals(ai.packageName)) { |
| addProviderLocked(ri); |
| } |
| } |
| } |
| |
| // TODO: If there's a better way of matching an intent filter against the |
| // packages for a given package, use that. |
| void updateProvidersForPackageLocked(String pkgName) { |
| HashSet<String> keep = new HashSet<String>(); |
| Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); |
| List<ResolveInfo> broadcastReceivers = mPackageManager.queryBroadcastReceivers(intent, |
| PackageManager.GET_META_DATA); |
| |
| // add the missing ones and collect which ones to keep |
| int N = broadcastReceivers.size(); |
| for (int i=0; i<N; i++) { |
| ResolveInfo ri = broadcastReceivers.get(i); |
| ActivityInfo ai = ri.activityInfo; |
| if (pkgName.equals(ai.packageName)) { |
| ComponentName component = new ComponentName(ai.packageName, ai.name); |
| Provider p = lookupProviderLocked(component); |
| if (p == null) { |
| if (addProviderLocked(ri)) { |
| keep.add(ai.name); |
| } |
| } else { |
| Provider parsed = parseProviderInfoXml(component, ri); |
| if (parsed != null) { |
| keep.add(ai.name); |
| // Use the new AppWidgetProviderInfo. |
| p.info = parsed.info; |
| // If it's enabled |
| final int M = p.instances.size(); |
| if (M > 0) { |
| int[] appWidgetIds = getAppWidgetIds(p); |
| // Reschedule for the new updatePeriodMillis (don't worry about handling |
| // it specially if updatePeriodMillis didn't change because we just sent |
| // an update, and the next one will be updatePeriodMillis from now). |
| cancelBroadcasts(p); |
| registerForBroadcastsLocked(p, appWidgetIds); |
| // If it's currently showing, call back with the new AppWidgetProviderInfo. |
| for (int j=0; j<M; j++) { |
| AppWidgetId id = p.instances.get(j); |
| if (id.host != null && id.host.callbacks != null) { |
| try { |
| id.host.callbacks.providerChanged(id.appWidgetId, p.info); |
| } catch (RemoteException ex) { |
| // It failed; remove the callback. No need to prune because |
| // we know that this host is still referenced by this |
| // instance. |
| id.host.callbacks = null; |
| } |
| } |
| } |
| // Now that we've told the host, push out an update. |
| sendUpdateIntentLocked(p, appWidgetIds); |
| } |
| } |
| } |
| } |
| } |
| |
| // prune the ones we don't want to keep |
| N = mInstalledProviders.size(); |
| for (int i=N-1; i>=0; i--) { |
| Provider p = mInstalledProviders.get(i); |
| if (pkgName.equals(p.info.provider.getPackageName()) |
| && !keep.contains(p.info.provider.getClassName())) { |
| removeProviderLocked(i, p); |
| } |
| } |
| } |
| |
| void removeProvidersForPackageLocked(String pkgName) { |
| int N = mInstalledProviders.size(); |
| for (int i=N-1; i>=0; i--) { |
| Provider p = mInstalledProviders.get(i); |
| if (pkgName.equals(p.info.provider.getPackageName())) { |
| removeProviderLocked(i, p); |
| } |
| } |
| |
| // Delete the hosts for this package too |
| // |
| // By now, we have removed any AppWidgets that were in any hosts here, |
| // so we don't need to worry about sending DISABLE broadcasts to them. |
| N = mHosts.size(); |
| for (int i=N-1; i>=0; i--) { |
| Host host = mHosts.get(i); |
| if (pkgName.equals(host.packageName)) { |
| deleteHostLocked(host); |
| } |
| } |
| } |
| } |
| |
