/* * 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 com.android.internal.app.HeavyWeightSwitcherActivity; import com.android.internal.os.BatteryStatsImpl; import com.android.server.am.ActivityManagerService.PendingActivityLaunch; import android.app.Activity; import android.app.AppGlobals; import android.app.IActivityManager; import static android.app.IActivityManager.START_CLASS_NOT_FOUND; import static android.app.IActivityManager.START_DELIVERED_TO_TOP; import static android.app.IActivityManager.START_FORWARD_AND_REQUEST_CONFLICT; import static android.app.IActivityManager.START_INTENT_NOT_RESOLVED; import static android.app.IActivityManager.START_PERMISSION_DENIED; import static android.app.IActivityManager.START_RETURN_INTENT_TO_CALLER; import static android.app.IActivityManager.START_SUCCESS; import static android.app.IActivityManager.START_SWITCHES_CANCELED; import static android.app.IActivityManager.START_TASK_TO_FRONT; import android.app.IApplicationThread; import android.app.PendingIntent; import android.app.ResultInfo; import android.app.IActivityManager.WaitResult; import android.content.ComponentName; import android.content.Context; import android.content.IIntentSender; import android.content.Intent; import android.content.IntentSender; import android.content.pm.ActivityInfo; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.content.res.Configuration; import android.net.Uri; import android.os.Binder; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.PowerManager; import android.os.RemoteException; import android.os.SystemClock; import android.util.EventLog; import android.util.Log; import android.util.Slog; import android.view.WindowManagerPolicy; import com.android.internal.app.ActivityTrigger; import java.lang.ref.WeakReference; import java.util.ArrayList; import java.util.Iterator; import java.util.List; /** * State and management of a single stack of activities. */ public class ActivityStack { static final String TAG = ActivityManagerService.TAG; static final boolean localLOGV = ActivityManagerService.localLOGV; static final boolean DEBUG_SWITCH = ActivityManagerService.DEBUG_SWITCH; static final boolean DEBUG_PAUSE = ActivityManagerService.DEBUG_PAUSE; static final boolean DEBUG_VISBILITY = ActivityManagerService.DEBUG_VISBILITY; static final boolean DEBUG_USER_LEAVING = ActivityManagerService.DEBUG_USER_LEAVING; static final boolean DEBUG_TRANSITION = ActivityManagerService.DEBUG_TRANSITION; static final boolean DEBUG_RESULTS = ActivityManagerService.DEBUG_RESULTS; static final boolean DEBUG_CONFIGURATION = ActivityManagerService.DEBUG_CONFIGURATION; static final boolean DEBUG_TASKS = ActivityManagerService.DEBUG_TASKS; static final boolean VALIDATE_TOKENS = ActivityManagerService.VALIDATE_TOKENS; // How long we wait until giving up on the last activity telling us it // is idle. static final int IDLE_TIMEOUT = 10*1000; // 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 can hold the launch wake lock before giving up. static final int LAUNCH_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 // 30 minutes. static final long ACTIVITY_INACTIVE_RESET_TIME = 1000*60*30; // 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; enum ActivityState { INITIALIZING, RESUMED, PAUSING, PAUSED, STOPPING, STOPPED, FINISHING, DESTROYING, DESTROYED } final ActivityManagerService mService; final boolean mMainStack; final Context mContext; /** * The back history of all previous (and possibly still * running) activities. It contains HistoryRecord objects. */ final ArrayList mHistory = new ArrayList(); /** * 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 mLRUActivities = new ArrayList(); /** * List of activities that are waiting for a new activity * to become visible before completing whatever operation they are * supposed to do. */ final ArrayList mWaitingVisibleActivities = new ArrayList(); /** * List of activities that are ready to be stopped, but waiting * for the next activity to settle down before doing so. It contains * HistoryRecord objects. */ final ArrayList mStoppingActivities = new ArrayList(); /** * Animations that for the current transition have requested not to * be considered for the transition animation. */ final ArrayList mNoAnimActivities = new ArrayList(); /** * List of activities that are ready to be finished, but waiting * for the previous activity to settle down before doing so. It contains * HistoryRecord objects. */ final ArrayList mFinishingActivities = new ArrayList(); /** * List of people waiting to find out about the next launched activity. */ final ArrayList mWaitingActivityLaunched = new ArrayList(); /** * List of people waiting to find out about the next visible activity. */ final ArrayList mWaitingActivityVisible = new ArrayList(); /** * Set when the system is going to sleep, until we have * successfully paused the current activity and released our wake lock. * At that point the system is allowed to actually sleep. */ final PowerManager.WakeLock mGoingToSleep; /** * We don't want to allow the device to go to sleep while in the process * of launching an activity. This is primarily to allow alarm intent * receivers to launch an activity and get that to run before the device * goes back to sleep. */ final PowerManager.WakeLock mLaunchingActivity; /** * 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; /** * 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; /** * Set when we know we are going to be calling updateConfiguration() * soon, so want to skip intermediate config checks. */ boolean mConfigWillChange; /** * Set to indicate whether to issue an onUserLeaving callback when a * newly launched activity is being brought in front of us. */ boolean mUserLeaving = false; long mInitialStartTime = 0; static final int PAUSE_TIMEOUT_MSG = 9; static final int IDLE_TIMEOUT_MSG = 10; static final int IDLE_NOW_MSG = 11; static final int LAUNCH_TIMEOUT_MSG = 16; static final int DESTROY_TIMEOUT_MSG = 17; static final int RESUME_TOP_ACTIVITY_MSG = 19; static final ActivityTrigger mActivityTrigger = new ActivityTrigger(); final Handler mHandler = new Handler() { //public Handler() { // if (localLOGV) Slog.v(TAG, "Handler started!"); //} public void handleMessage(Message msg) { switch (msg.what) { case PAUSE_TIMEOUT_MSG: { IBinder token = (IBinder)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 " + token); activityPaused(token, null, true); } break; case IDLE_TIMEOUT_MSG: { if (mService.mDidDexOpt) { mService.mDidDexOpt = false; Message nmsg = mHandler.obtainMessage(IDLE_TIMEOUT_MSG); nmsg.obj = msg.obj; mHandler.sendMessageDelayed(nmsg, IDLE_TIMEOUT); return; } // We don't at this point know if the activity is fullscreen, // so we need to be conservative and assume it isn't. IBinder token = (IBinder)msg.obj; Slog.w(TAG, "Activity idle timeout for " + token); activityIdleInternal(token, true, null); } break; case DESTROY_TIMEOUT_MSG: { IBinder token = (IBinder)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 " + token); activityDestroyed(token); } break; case IDLE_NOW_MSG: { IBinder token = (IBinder)msg.obj; activityIdleInternal(token, false, null); } break; case LAUNCH_TIMEOUT_MSG: { if (mService.mDidDexOpt) { mService.mDidDexOpt = false; Message nmsg = mHandler.obtainMessage(LAUNCH_TIMEOUT_MSG); mHandler.sendMessageDelayed(nmsg, LAUNCH_TIMEOUT); return; } synchronized (mService) { if (mLaunchingActivity.isHeld()) { Slog.w(TAG, "Launch timeout has expired, giving up wake lock!"); mLaunchingActivity.release(); } } } break; case RESUME_TOP_ACTIVITY_MSG: { synchronized (mService) { resumeTopActivityLocked(null); } } break; } } }; ActivityStack(ActivityManagerService service, Context context, boolean mainStack) { mService = service; mContext = context; mMainStack = mainStack; PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE); mGoingToSleep = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "ActivityManager-Sleep"); mLaunchingActivity = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "ActivityManager-Launch"); mLaunchingActivity.setReferenceCounted(false); } final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { int i = mHistory.size()-1; while (i >= 0) { ActivityRecord r = (ActivityRecord)mHistory.get(i); if (!r.finishing && r != notTop) { return r; } i--; } return null; } final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { int i = mHistory.size()-1; while (i >= 0) { ActivityRecord r = (ActivityRecord)mHistory.get(i); if (!r.finishing && !r.delayedResume && r != notTop) { return r; } i--; } 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) { int i = mHistory.size()-1; while (i >= 0) { ActivityRecord r = (ActivityRecord)mHistory.get(i); // Note: the taskId check depends on real taskId fields being non-zero if (!r.finishing && (token != r) && (taskId != r.task.taskId)) { return r; } i--; } return null; } final int indexOfTokenLocked(IBinder token) { int count = mHistory.size(); // convert the token to an entry in the history. int index = -1; for (int i=count-1; i>=0; i--) { Object o = mHistory.get(i); if (o == token) { index = i; break; } } return index; } private final boolean updateLRUListLocked(ActivityRecord r) { final boolean hadit = mLRUActivities.remove(r); mLRUActivities.add(r); return hadit; } /** * Returns the top activity in any existing task matching the given * Intent. Returns null if no such task is found. */ private ActivityRecord findTaskLocked(Intent intent, ActivityInfo info) { ComponentName cls = intent.getComponent(); if (info.targetActivity != null) { cls = new ComponentName(info.packageName, info.targetActivity); } TaskRecord cp = null; final int N = mHistory.size(); for (int i=(N-1); i>=0; i--) { ActivityRecord r = (ActivityRecord)mHistory.get(i); if (!r.finishing && r.task != cp && r.launchMode != ActivityInfo.LAUNCH_SINGLE_INSTANCE) { cp = r.task; //Slog.i(TAG, "Comparing existing cls=" + r.task.intent.getComponent().flattenToShortString() // + "/aff=" + r.task.affinity + " to new cls=" // + intent.getComponent().flattenToShortString() + "/aff=" + taskAffinity); if (r.task.affinity != null) { if (r.task.affinity.equals(info.taskAffinity)) { //Slog.i(TAG, "Found matching affinity!"); return r; } } else if (r.task.intent != null && r.task.intent.getComponent().equals(cls)) { //Slog.i(TAG, "Found matching class!"); //dump(); //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); return r; } else if (r.task.affinityIntent != null && r.task.affinityIntent.getComponent().equals(cls)) { //Slog.i(TAG, "Found matching class!"); //dump(); //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); return r; } } } 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. */ private ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { ComponentName cls = intent.getComponent(); if (info.targetActivity != null) { cls = new ComponentName(info.packageName, info.targetActivity); } final int N = mHistory.size(); for (int i=(N-1); i>=0; i--) { ActivityRecord r = (ActivityRecord)mHistory.get(i); if (!r.finishing) { if (r.intent.getComponent().equals(cls)) { //Slog.i(TAG, "Found matching class!"); //dump(); //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); return r; } } } return null; } final boolean realStartActivityLocked(ActivityRecord r, ProcessRecord app, boolean andResume, boolean checkConfig) throws RemoteException { r.startFreezingScreenLocked(app, 0); mService.mWindowManager.setAppVisibility(r, true); // Have the window manager re-evaluate the orientation of // the screen based on the new activity order. Note that // as a result of this, it can call back into the activity // manager with a new orientation. We don't care about that, // because the activity is not currently running so we are // just restarting it anyway. if (checkConfig) { Configuration config = mService.mWindowManager.updateOrientationFromAppTokens( mService.mConfiguration, r.mayFreezeScreenLocked(app) ? r : null); mService.updateConfigurationLocked(config, r); } r.app = app; if (localLOGV) Slog.v(TAG, "Launching: " + r); int idx = app.activities.indexOf(r); if (idx < 0) { app.activities.add(r); } mService.updateLruProcessLocked(app, true, true); try { if (app.thread == null) { throw new RemoteException(); } List results = null; List newIntents = null; if (andResume) { results = r.results; newIntents = r.newIntents; } if (DEBUG_SWITCH) Slog.v(TAG, "Launching: " + r + " icicle=" + r.icicle + " with results=" + results + " newIntents=" + newIntents + " andResume=" + andResume); if (andResume) { EventLog.writeEvent(EventLogTags.AM_RESTART_ACTIVITY, System.identityHashCode(r), r.task.taskId, r.shortComponentName); } if (r.isHomeActivity) { mService.mHomeProcess = app; } mService.ensurePackageDexOpt(r.intent.getComponent().getPackageName()); app.thread.scheduleLaunchActivity(new Intent(r.intent), r, System.identityHashCode(r), r.info, r.icicle, results, newIntents, !andResume, mService.isNextTransitionForward()); if ((app.info.flags&ApplicationInfo.FLAG_CANT_SAVE_STATE) != 0) { // This may be a heavy-weight process! Note that the package // manager will ensure that only activity can run in the main // process of the .apk, which is the only thing that will be // considered heavy-weight. if (app.processName.equals(app.info.packageName)) { if (mService.mHeavyWeightProcess != null && mService.mHeavyWeightProcess != app) { Log.w(TAG, "Starting new heavy weight process " + app + " when already running " + mService.mHeavyWeightProcess); } mService.mHeavyWeightProcess = app; Message msg = mService.mHandler.obtainMessage( ActivityManagerService.POST_HEAVY_NOTIFICATION_MSG); msg.obj = r; mService.mHandler.sendMessage(msg); } } } catch (RemoteException e) { if (r.launchFailed) { // This is the second time we failed -- finish activity // and give up. Slog.e(TAG, "Second failure launching " + r.intent.getComponent().flattenToShortString() + ", giving up", e); mService.appDiedLocked(app, app.pid, app.thread); requestFinishActivityLocked(r, Activity.RESULT_CANCELED, null, "2nd-crash"); return false; } // This is the first time we failed -- restart process and // retry. app.activities.remove(r); throw e; } r.launchFailed = false; if (updateLRUListLocked(r)) { Slog.w(TAG, "Activity " + r + " being launched, but already in LRU list"); } if (andResume) { // As part of the process of launching, ActivityThread also performs // a resume. r.state = ActivityState.RESUMED; r.icicle = null; r.haveState = false; r.stopped = false; mResumedActivity = r; r.task.touchActiveTime(); completeResumeLocked(r); pauseIfSleepingLocked(); } else { // This activity is not starting in the resumed state... which // should look like we asked it to pause+stop (but remain visible), // and it has done so and reported back the current icicle and // other state. r.state = ActivityState.STOPPED; r.stopped = true; } // Launch the new version setup screen if needed. We do this -after- // launching the initial activity (that is, home), so that it can have // a chance to initialize itself while in the background, making the // switch back to it faster and look better. if (mMainStack) { mService.startSetupActivityLocked(); } return true; } private final void startSpecificActivityLocked(ActivityRecord r, boolean andResume, boolean checkConfig) { // Is this activity's application already running? ProcessRecord app = mService.getProcessRecordLocked(r.processName, r.info.applicationInfo.uid); if (r.launchTime == 0) { r.launchTime = SystemClock.uptimeMillis(); if (mInitialStartTime == 0) { mInitialStartTime = r.launchTime; } } else if (mInitialStartTime == 0) { mInitialStartTime = SystemClock.uptimeMillis(); } if (app != null && app.thread != null) { try { realStartActivityLocked(r, app, andResume, checkConfig); return; } catch (RemoteException e) { Slog.w(TAG, "Exception when starting activity " + r.intent.getComponent().flattenToShortString(), e); } // If a dead object exception was thrown -- fall through to // restart the application. } mService.startProcessLocked(r.processName, r.info.applicationInfo, true, 0, "activity", r.intent.getComponent(), false); } void pauseIfSleepingLocked() { if (mService.mSleeping || mService.mShuttingDown) { if (!mGoingToSleep.isHeld()) { mGoingToSleep.acquire(); if (mLaunchingActivity.isHeld()) { mLaunchingActivity.release(); mService.mHandler.removeMessages(LAUNCH_TIMEOUT_MSG); } } // If we are not currently pausing an activity, get the current // one to pause. If we are pausing one, we will just let that stuff // run and release the wake lock when all done. if (mPausingActivity == null) { if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause..."); if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); startPausingLocked(false, true); } } } private final void startPausingLocked(boolean userLeaving, boolean uiSleeping) { if (mPausingActivity != null) { RuntimeException e = new RuntimeException(); Slog.e(TAG, "Trying to pause when pause is already pending for " + mPausingActivity, e); } ActivityRecord prev = mResumedActivity; if (prev == null) { RuntimeException e = new RuntimeException(); Slog.e(TAG, "Trying to pause when nothing is resumed", e); resumeTopActivityLocked(null); return; } if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); mResumedActivity = null; mPausingActivity = prev; mLastPausedActivity = prev; prev.state = ActivityState.PAUSING; prev.task.touchActiveTime(); 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, System.identityHashCode(prev), prev.shortComponentName); prev.app.thread.schedulePauseActivity(prev, prev.finishing, userLeaving, prev.configChangeFlags); if (mMainStack) { mService.updateUsageStats(prev, false); } } catch (Exception e) { // Ignore exception, if process died other code will cleanup. Slog.w(TAG, "Exception thrown during pause", e); mPausingActivity = null; mLastPausedActivity = null; } } else { mPausingActivity = null; mLastPausedActivity = null; } // If we are not going to sleep, we want to ensure the device is // awake until the next activity is started. if (!mService.mSleeping && !mService.mShuttingDown) { mLaunchingActivity.acquire(); if (!mHandler.hasMessages(LAUNCH_TIMEOUT_MSG)) { // To be safe, don't allow the wake lock to be held for too long. Message msg = mHandler.obtainMessage(LAUNCH_TIMEOUT_MSG); mHandler.sendMessageDelayed(msg, LAUNCH_TIMEOUT); } } 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"); } // 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; mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); } 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."); resumeTopActivityLocked(null); } } final void activityPaused(IBinder token, Bundle icicle, boolean timeout) { if (DEBUG_PAUSE) Slog.v( TAG, "Activity paused: token=" + token + ", icicle=" + icicle + ", timeout=" + timeout); ActivityRecord r = null; synchronized (mService) { int index = indexOfTokenLocked(token); if (index >= 0) { r = (ActivityRecord)mHistory.get(index); if (!timeout) { r.icicle = icicle; r.haveState = true; } mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); if (mPausingActivity == r) { r.state = ActivityState.PAUSED; completePauseLocked(); } else { EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, System.identityHashCode(r), r.shortComponentName, mPausingActivity != null ? mPausingActivity.shortComponentName : "(none)"); } } } } private final void completePauseLocked() { ActivityRecord prev = mPausingActivity; if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); if (prev != null) { if (prev.finishing) { if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE); } else if (prev.app != null) { if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); if (prev.waitingVisible) { prev.waitingVisible = false; 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); } else { mStoppingActivities.add(prev); if (mStoppingActivities.size() > 3) { // If we already have a few activities waiting to stop, // then give up on things going idle and start clearing // them out. if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); Message msg = Message.obtain(); msg.what = IDLE_NOW_MSG; mHandler.sendMessage(msg); } } } else { if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); prev = null; } mPausingActivity = null; } if (!mService.mSleeping && !mService.mShuttingDown) { resumeTopActivityLocked(prev); } else { if (mGoingToSleep.isHeld()) { mGoingToSleep.release(); } if (mService.mShuttingDown) { mService.notifyAll(); } } if (prev != null) { prev.resumeKeyDispatchingLocked(); } if (prev.app != null && prev.cpuTimeAtResume > 0 && mService.mBatteryStatsService.isOnBattery()) { long diff = 0; synchronized (mService.mProcessStatsThread) { diff = mService.mProcessStats.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 } /** * 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 final void completeResumeLocked(ActivityRecord next) { next.idle = false; next.results = null; next.newIntents = null; // schedule an idle timeout in case the app doesn't do it for us. Message msg = mHandler.obtainMessage(IDLE_TIMEOUT_MSG); msg.obj = next; mHandler.sendMessageDelayed(msg, IDLE_TIMEOUT); if (false) { // The activity was never told to pause, so just keep // things going as-is. To maintain our own state, // we need to emulate it coming back and saying it is // idle. msg = mHandler.obtainMessage(IDLE_NOW_MSG); msg.obj = next; mHandler.sendMessage(msg); } if (mMainStack) { mService.reportResumedActivityLocked(next); } next.thumbnail = null; if (mMainStack) { mService.setFocusedActivityLocked(next); } next.resumeKeyDispatchingLocked(); ensureActivitiesVisibleLocked(null, 0); mService.mWindowManager.executeAppTransition(); 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) { synchronized (mService.mProcessStatsThread) { next.cpuTimeAtResume = mService.mProcessStats.getCpuTimeForPid(next.app.pid); } } else { next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process } } /** * 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 top, ActivityRecord starting, String onlyThisProcess, int configChanges) { if (DEBUG_VISBILITY) Slog.v( TAG, "ensureActivitiesVisible behind " + top + " configChanges=0x" + Integer.toHexString(configChanges)); // If the top activity is not fullscreen, then we need to // make sure any activities under it are now visible. final int count = mHistory.size(); int i = count-1; while (mHistory.get(i) != top) { i--; } ActivityRecord r; boolean behindFullscreen = false; for (; i>=0; i--) { r = (ActivityRecord)mHistory.get(i); if (DEBUG_VISBILITY) Slog.v( TAG, "Make visible? " + r + " finishing=" + r.finishing + " state=" + r.state); if (r.finishing) { continue; } final boolean doThisProcess = onlyThisProcess == null || onlyThisProcess.equals(r.processName); // First: if this is not the current activity being started, make // sure it matches the current configuration. if (r != starting && doThisProcess) { ensureActivityConfigurationLocked(r, 0); } if (r.app == null || r.app.thread == null) { if (onlyThisProcess == null || onlyThisProcess.equals(r.processName)) { // 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) { if (DEBUG_VISBILITY) Slog.v( TAG, "Starting and making visible: " + r); mService.mWindowManager.setAppVisibility(r, true); } if (r != starting) { 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); } else if (onlyThisProcess == null) { // 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 { mService.mWindowManager.setAppVisibility(r, true); r.app.thread.scheduleWindowVisibility(r, 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, "Stopping: fullscreen at " + r); behindFullscreen = true; i--; break; } } // Now for any activities that aren't visible to the user, make // sure they no longer are keeping the screen frozen. while (i >= 0) { r = (ActivityRecord)mHistory.get(i); if (DEBUG_VISBILITY) Slog.v( TAG, "Make invisible? " + r + " finishing=" + r.finishing + " state=" + r.state + " behindFullscreen=" + behindFullscreen); if (!r.finishing) { if (behindFullscreen) { if (r.visible) { if (DEBUG_VISBILITY) Slog.v( TAG, "Making invisible: " + r); r.visible = false; try { mService.mWindowManager.setAppVisibility(r, false); if ((r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) && r.app != null && r.app.thread != null) { if (DEBUG_VISBILITY) Slog.v( TAG, "Scheduling invisibility: " + r); r.app.thread.scheduleWindowVisibility(r, false); } } 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); } } else if (r.fullscreen) { if (DEBUG_VISBILITY) Slog.v( TAG, "Now behindFullscreen: " + r); behindFullscreen = true; } } i--; } } /** * Version of ensureActivitiesVisible that can easily be called anywhere. */ final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { ActivityRecord r = topRunningActivityLocked(null); if (r != null) { ensureActivitiesVisibleLocked(r, starting, null, configChanges); } } /** * 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) { // Find the first activity that is not finishing. 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 = mUserLeaving; mUserLeaving = false; if (next == null) { // There are no more activities! Let's just start up the // Launcher... if (mMainStack) { return mService.startHomeActivityLocked(); } } next.delayedResume = false; // If the top activity is the resumed one, nothing to do. if (mResumedActivity == next && next.state == ActivityState.RESUMED) { // Make sure we have executed any pending transitions, since there // should be nothing left to do at this point. mService.mWindowManager.executeAppTransition(); mNoAnimActivities.clear(); return false; } // 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.mSleeping || mService.mShuttingDown) && mLastPausedActivity == next && next.state == ActivityState.PAUSED) { // Make sure we have executed any pending transitions, since there // should be nothing left to do at this point. mService.mWindowManager.executeAppTransition(); mNoAnimActivities.clear(); return false; } // The activity may be waiting for stop, but that is no longer // appropriate for it. mStoppingActivities.remove(next); mWaitingVisibleActivities.remove(next); if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); mActivityTrigger.activityResumeTrigger(next.intent); // If we are currently pausing an activity, then don't do anything // until that is done. if (mPausingActivity != null) { if (DEBUG_SWITCH) Slog.v(TAG, "Skip resume: pausing=" + mPausingActivity); 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... if (mResumedActivity != null) { if (DEBUG_SWITCH) Slog.v(TAG, "Skip resume: need to start pausing"); startPausingLocked(userLeaving, false); return true; } if (prev != null && prev != next) { if (!prev.waitingVisible && next != null && !next.nowVisible) { prev.waitingVisible = true; 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) { mService.mWindowManager.setAppVisibility(prev, 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); } } } // 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. if (prev != null) { if (prev.finishing) { if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare close transition: prev=" + prev); if (mNoAnimActivities.contains(prev)) { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_NONE); } else { mService.mWindowManager.prepareAppTransition(prev.task == next.task ? WindowManagerPolicy.TRANSIT_ACTIVITY_CLOSE : WindowManagerPolicy.TRANSIT_TASK_CLOSE); } mService.mWindowManager.setAppWillBeHidden(prev); mService.mWindowManager.setAppVisibility(prev, false); } else { if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); if (mNoAnimActivities.contains(next)) { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_NONE); } else { mService.mWindowManager.prepareAppTransition(prev.task == next.task ? WindowManagerPolicy.TRANSIT_ACTIVITY_OPEN : WindowManagerPolicy.TRANSIT_TASK_OPEN); } } if (false) { mService.mWindowManager.setAppWillBeHidden(prev); mService.mWindowManager.setAppVisibility(prev, false); } } else if (mHistory.size() > 1) { if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); if (mNoAnimActivities.contains(next)) { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_NONE); } else { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_ACTIVITY_OPEN); } } if (next.app != null && next.app.thread != null) { if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); // This activity is now becoming visible. mService.mWindowManager.setAppVisibility(next, true); ActivityRecord lastResumedActivity = mResumedActivity; ActivityState lastState = next.state; mService.updateCpuStats(); next.state = ActivityState.RESUMED; mResumedActivity = next; next.task.touchActiveTime(); mService.updateLruProcessLocked(next.app, true, true); updateLRUListLocked(next); // Have the window manager re-evaluate the orientation of // the screen based on the new activity order. boolean updated = false; if (mMainStack) { synchronized (mService) { Configuration config = mService.mWindowManager.updateOrientationFromAppTokens( mService.mConfiguration, next.mayFreezeScreenLocked(next.app) ? next : null); if (config != null) { next.frozenBeforeDestroy = true; } updated = mService.updateConfigurationLocked(config, next); } } if (!updated) { // 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) Slog.i(TAG, "Activity config changed during resume: " + next + ", new next: " + nextNext); if (nextNext != next) { // Do over! mHandler.sendEmptyMessage(RESUME_TOP_ACTIVITY_MSG); } if (mMainStack) { mService.setFocusedActivityLocked(next); } ensureActivitiesVisibleLocked(null, 0); mService.mWindowManager.executeAppTransition(); mNoAnimActivities.clear(); return true; } try { // Deliver all pending results. ArrayList 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, a); } } if (next.newIntents != null) { next.app.thread.scheduleNewIntent(next.newIntents, next); } EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, System.identityHashCode(next), next.task.taskId, next.shortComponentName); next.app.thread.scheduleResumeActivity(next, mService.isNextTransitionForward()); pauseIfSleepingLocked(); } catch (Exception e) { // Whoops, need to restart this activity! next.state = lastState; mResumedActivity = lastResumedActivity; Slog.i(TAG, "Restarting because process died: " + next); if (!next.hasBeenLaunched) { next.hasBeenLaunched = true; } else { if (SHOW_APP_STARTING_PREVIEW && mMainStack) { mService.mWindowManager.setAppStartingWindow( next, next.packageName, next.theme, next.nonLocalizedLabel, next.labelRes, next.icon, null, true); } } startSpecificActivityLocked(next, true, false); 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, Activity.RESULT_CANCELED, null, "resume-exception"); return true; } // Didn't need to use the icicle, and it is now out of date. next.icicle = null; next.haveState = false; next.stopped = false; } else { // Whoops, need to restart this activity! if (!next.hasBeenLaunched) { next.hasBeenLaunched = true; } else { if (SHOW_APP_STARTING_PREVIEW) { mService.mWindowManager.setAppStartingWindow( next, next.packageName, next.theme, next.nonLocalizedLabel, next.labelRes, next.icon, null, true); } if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); } startSpecificActivityLocked(next, true, true); } return true; } private final void startActivityLocked(ActivityRecord r, boolean newTask, boolean doResume) { final int NH = mHistory.size(); int addPos = -1; if (!newTask) { // If starting in an existing task, find where that is... boolean startIt = true; for (int i = NH-1; i >= 0; i--) { ActivityRecord p = (ActivityRecord)mHistory.get(i); if (p.finishing) { continue; } if (p.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. addPos = i+1; if (!startIt) { mHistory.add(addPos, r); r.inHistory = true; r.task.numActivities++; mService.mWindowManager.addAppToken(addPos, r, r.task.taskId, r.info.screenOrientation, r.fullscreen); if (VALIDATE_TOKENS) { mService.mWindowManager.validateAppTokens(mHistory); } return; } break; } if (p.fullscreen) { startIt = false; } } } // Place a new activity at top of stack, so it is next to interact // with the user. if (addPos < 0) { addPos = NH; } // If we are not placing the new activity frontmost, we do not want // to deliver the onUserLeaving callback to the actual frontmost // activity if (addPos < NH) { mUserLeaving = false; if (DEBUG_USER_LEAVING) Slog.v(TAG, "startActivity() behind front, mUserLeaving=false"); } // Slot the activity into the history stack and proceed mHistory.add(addPos, r); r.inHistory = true; r.frontOfTask = newTask; r.task.numActivities++; if (NH > 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) { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_NONE); mNoAnimActivities.add(r); } else if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { mService.mWindowManager.prepareAppTransition( WindowManagerPolicy.TRANSIT_TASK_OPEN); mNoAnimActivities.remove(r); } else { mService.mWindowManager.prepareAppTransition(newTask ? WindowManagerPolicy.TRANSIT_TASK_OPEN : WindowManagerPolicy.TRANSIT_ACTIVITY_OPEN); mNoAnimActivities.remove(r); } mService.mWindowManager.addAppToken( addPos, r, r.task.taskId, r.info.screenOrientation, r.fullscreen); 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; } } 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; } mService.mWindowManager.setAppStartingWindow( r, r.packageName, r.theme, r.nonLocalizedLabel, r.labelRes, r.icon, prev, showStartingIcon); } } else { // If this is the first activity, don't do any fancy animations, // because there is nothing for it to animate on top of. mService.mWindowManager.addAppToken(addPos, r, r.task.taskId, r.info.screenOrientation, r.fullscreen); } if (VALIDATE_TOKENS) { mService.mWindowManager.validateAppTokens(mHistory); } if (doResume) { resumeTopActivityLocked(null); } } /** * Perform a reset of the given task, if needed as part of launching it. * Returns the new HistoryRecord at the top of the task. */ private final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, ActivityRecord newActivity) { boolean forceReset = (newActivity.info.flags &ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; if (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; // We are going to move through the history list so that we can look // at each activity 'target' with 'below' either the interesting // activity immediately below it in the stack or null. ActivityRecord target = null; int targetI = 0; int taskTopI = -1; int replyChainEnd = -1; int lastReparentPos = -1; for (int i=mHistory.size()-1; i>=-1; i--) { ActivityRecord below = i >= 0 ? (ActivityRecord)mHistory.get(i) : null; if (below != null && below.finishing) { continue; } if (target == null) { target = below; targetI = i; // If we were in the middle of a reply chain before this // task, it doesn't appear like the root of the chain wants // anything interesting, so drop it. replyChainEnd = -1; continue; } 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; if (target.task == task) { // 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. 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!). if (taskTopI < 0) { taskTopI = targetI; } if (below != null && below.task == task) { 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 = targetI; } } 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. ActivityRecord p = (ActivityRecord)mHistory.get(0); if (target.taskAffinity != null && target.taskAffinity.equals(p.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. target.task = p.task; if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target + " out to bottom task " + p.task); } else { mService.mCurTask++; if (mService.mCurTask <= 0) { mService.mCurTask = 1; } target.task = new TaskRecord(mService.mCurTask, target.info, null, (target.info.flags&ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0); target.task.affinityIntent = target.intent; if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target + " out to new task " + target.task); } mService.mWindowManager.setAppGroupId(target, task.taskId); if (replyChainEnd < 0) { replyChainEnd = targetI; } int dstPos = 0; for (int srcPos=targetI; srcPos<=replyChainEnd; srcPos++) { p = (ActivityRecord)mHistory.get(srcPos); if (p.finishing) { continue; } if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p + " out to target's task " + target.task); task.numActivities--; p.task = target.task; target.task.numActivities++; mHistory.remove(srcPos); mHistory.add(dstPos, p); mService.mWindowManager.moveAppToken(dstPos, p); mService.mWindowManager.setAppGroupId(p, p.task.taskId); dstPos++; if (VALIDATE_TOKENS) { mService.mWindowManager.validateAppTokens(mHistory); } i++; } if (taskTop == p) { taskTop = below; } if (taskTopI == replyChainEnd) { taskTopI = -1; } replyChainEnd = -1; if (mMainStack) { mService.addRecentTaskLocked(target.task); } } 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. 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. replyChainEnd = targetI+1; while (replyChainEnd < mHistory.size() && ((ActivityRecord)mHistory.get( replyChainEnd)).task == task) { replyChainEnd++; } replyChainEnd--; } else if (replyChainEnd < 0) { replyChainEnd = targetI; } ActivityRecord p = null; for (int srcPos=targetI; srcPos<=replyChainEnd; srcPos++) { p = (ActivityRecord)mHistory.get(srcPos); if (p.finishing) { continue; } if (finishActivityLocked(p, srcPos, Activity.RESULT_CANCELED, null, "reset")) { replyChainEnd--; srcPos--; } } if (taskTop == p) { taskTop = below; } if (taskTopI == replyChainEnd) { taskTopI = -1; } 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; } } else { // Reached the bottom of the task -- any reply chain // should be left as-is. replyChainEnd = -1; } } else 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 = targetI; } } else if (taskTopI >= 0 && allowTaskReparenting && task.affinity != null && task.affinity.equals(target.taskAffinity)) { // We are inside of another task... if this activity has // an affinity for our task, then 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) { if (replyChainEnd < 0) { replyChainEnd = targetI; } ActivityRecord p = null; for (int srcPos=targetI; srcPos<=replyChainEnd; srcPos++) { p = (ActivityRecord)mHistory.get(srcPos); if (p.finishing) { continue; } if (finishActivityLocked(p, srcPos, Activity.RESULT_CANCELED, null, "reset")) { taskTopI--; lastReparentPos--; replyChainEnd--; srcPos--; } } replyChainEnd = -1; } else { if (replyChainEnd < 0) { replyChainEnd = targetI; } for (int srcPos=replyChainEnd; srcPos>=targetI; srcPos--) { ActivityRecord p = (ActivityRecord)mHistory.get(srcPos); if (p.finishing) { continue; } if (lastReparentPos < 0) { lastReparentPos = taskTopI; taskTop = p; } else { lastReparentPos--; } mHistory.remove(srcPos); p.task.numActivities--; p.task = task; mHistory.add(lastReparentPos, p); if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " in to resetting task " + task); task.numActivities++; mService.mWindowManager.moveAppToken(lastReparentPos, p); mService.mWindowManager.setAppGroupId(p, p.task.taskId); if (VALIDATE_TOKENS) { mService.mWindowManager.validateAppTokens(mHistory); } } replyChainEnd = -1; // 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) { for (int j=lastReparentPos-1; j>=0; j--) { ActivityRecord p = (ActivityRecord)mHistory.get(j); if (p.finishing) { continue; } if (p.intent.getComponent().equals(target.intent.getComponent())) { if (finishActivityLocked(p, j, Activity.RESULT_CANCELED, null, "replace")) { taskTopI--; lastReparentPos--; } } } } } } target = below; targetI = i; } return taskTop; } /** * Perform clear operation as requested by * {@link Intent#FLAG_ACTIVITY_CLEAR_TOP}: search from the top of the * stack to the given task, then look for * an instance of that activity in the stack and, if found, finish all * activities on top of it and return the instance. * * @param newR Description of the new activity being started. * @return Returns the old activity that should be continue to be used, * or null if none was found. */ private final ActivityRecord performClearTaskLocked(int taskId, ActivityRecord newR, int launchFlags, boolean doClear) { int i = mHistory.size(); // First find the requested task. while (i > 0) { i--; ActivityRecord r = (ActivityRecord)mHistory.get(i); if (r.task.taskId == taskId) { i++; break; } } // Now clear it. while (i > 0) { i--; ActivityRecord r = (ActivityRecord)mHistory.get(i); if (r.finishing) { continue; } if (r.task.taskId != taskId) { return null; } if (r.realActivity.equals(newR.realActivity)) { // Here it is! Now finish everything in front... ActivityRecord ret = r; if (doClear) { while (i < (mHistory.size()-1)) { i++; r = (ActivityRecord)mHistory.get(i); if (r.finishing) { continue; } if (finishActivityLocked(r, i, Activity.RESULT_CANCELED, null, "clear")) { i--; } } } // Finally, if this is a normal launch mode (that is, not // expecting onNewIntent()), then we will finish the current // instance of the activity so a new fresh one can be started. if (ret.launchMode == ActivityInfo.LAUNCH_MULTIPLE && (launchFlags&Intent.FLAG_ACTIVITY_SINGLE_TOP) == 0) { if (!ret.finishing) { int index = indexOfTokenLocked(ret); if (index >= 0) { finishActivityLocked(ret, index, Activity.RESULT_CANCELED, null, "clear"); } return null; } } return ret; } } return null; } /** * Find the activity in the history stack within the given task. Returns * the index within the history at which it's found, or < 0 if not found. */ private final int findActivityInHistoryLocked(ActivityRecord r, int task) { int i = mHistory.size(); while (i > 0) { i--; ActivityRecord candidate = (ActivityRecord)mHistory.get(i); if (candidate.task.taskId != task) { break; } if (candidate.realActivity.equals(r.realActivity)) { return i; } } return -1; } /** * Reorder the history stack so that the activity at the given index is * brought to the front. */ private final ActivityRecord moveActivityToFrontLocked(int where) { ActivityRecord newTop = (ActivityRecord)mHistory.remove(where); int top = mHistory.size(); ActivityRecord oldTop = (ActivityRecord)mHistory.get(top-1); mHistory.add(top, newTop); oldTop.frontOfTask = false; newTop.frontOfTask = true; return newTop; } final int startActivityLocked(IApplicationThread caller, Intent intent, String resolvedType, Uri[] grantedUriPermissions, int grantedMode, ActivityInfo aInfo, IBinder resultTo, String resultWho, int requestCode, int callingPid, int callingUid, boolean onlyIfNeeded, boolean componentSpecified) { int err = START_SUCCESS; ProcessRecord callerApp = null; if (caller != null) { callerApp = mService.getRecordForAppLocked(caller); if (callerApp != null) { callingPid = callerApp.pid; callingUid = callerApp.info.uid; } else { Slog.w(TAG, "Unable to find app for caller " + caller + " (pid=" + callingPid + ") when starting: " + intent.toString()); err = START_PERMISSION_DENIED; } } if (err == START_SUCCESS) { Slog.i(TAG, "Starting: " + intent + " from pid " + (callerApp != null ? callerApp.pid : callingPid)); mActivityTrigger.activityStartTrigger(intent); } ActivityRecord sourceRecord = null; ActivityRecord resultRecord = null; if (resultTo != null) { int index = indexOfTokenLocked(resultTo); if (DEBUG_RESULTS) Slog.v( TAG, "Sending result to " + resultTo + " (index " + index + ")"); if (index >= 0) { sourceRecord = (ActivityRecord)mHistory.get(index); if (requestCode >= 0 && !sourceRecord.finishing) { resultRecord = sourceRecord; } } } int launchFlags = intent.getFlags(); if ((launchFlags&Intent.FLAG_ACTIVITY_FORWARD_RESULT) != 0 && sourceRecord != null) { // Transfer the result target from the source activity to the new // one being started, including any failures. if (requestCode >= 0) { return START_FORWARD_AND_REQUEST_CONFLICT; } resultRecord = sourceRecord.resultTo; resultWho = sourceRecord.resultWho; requestCode = sourceRecord.requestCode; sourceRecord.resultTo = null; if (resultRecord != null) { resultRecord.removeResultsLocked( sourceRecord, resultWho, requestCode); } } if (err == START_SUCCESS && intent.getComponent() == null) { // We couldn't find a class that can handle the given Intent. // That's the end of that! err = START_INTENT_NOT_RESOLVED; } if (err == START_SUCCESS && aInfo == null) { // We couldn't find the specific class specified in the Intent. // Also the end of the line. err = START_CLASS_NOT_FOUND; } if (err != START_SUCCESS) { if (resultRecord != null) { sendActivityResultLocked(-1, resultRecord, resultWho, requestCode, Activity.RESULT_CANCELED, null); } return err; } final int perm = mService.checkComponentPermission(aInfo.permission, callingPid, callingUid, aInfo.exported ? -1 : aInfo.applicationInfo.uid); if (perm != PackageManager.PERMISSION_GRANTED) { if (resultRecord != null) { sendActivityResultLocked(-1, resultRecord, resultWho, requestCode, Activity.RESULT_CANCELED, null); } String msg = "Permission Denial: starting " + intent.toString() + " from " + callerApp + " (pid=" + callingPid + ", uid=" + callingUid + ")" + " requires " + aInfo.permission; Slog.w(TAG, msg); throw new SecurityException(msg); } if (mMainStack) { if (mService.mController != null) { boolean abort = false; try { // The Intent we give to the watcher has the extra data // stripped off, since it can contain private information. Intent watchIntent = intent.cloneFilter(); abort = !mService.mController.activityStarting(watchIntent, aInfo.applicationInfo.packageName); } catch (RemoteException e) { mService.mController = null; } if (abort) { if (resultRecord != null) { sendActivityResultLocked(-1, resultRecord, resultWho, requestCode, Activity.RESULT_CANCELED, null); } // We pretend to the caller that it was really started, but // they will just get a cancel result. return START_SUCCESS; } } } ActivityRecord r = new ActivityRecord(mService, this, callerApp, callingUid, intent, resolvedType, aInfo, mService.mConfiguration, resultRecord, resultWho, requestCode, componentSpecified); if (mMainStack) { if (mResumedActivity == null || mResumedActivity.info.applicationInfo.uid != callingUid) { if (!mService.checkAppSwitchAllowedLocked(callingPid, callingUid, "Activity start")) { PendingActivityLaunch pal = new PendingActivityLaunch(); pal.r = r; pal.sourceRecord = sourceRecord; pal.grantedUriPermissions = grantedUriPermissions; pal.grantedMode = grantedMode; pal.onlyIfNeeded = onlyIfNeeded; mService.mPendingActivityLaunches.add(pal); return START_SWITCHES_CANCELED; } } if (mService.mDidAppSwitch) { // This is the second allowed switch since we stopped switches, // so now just generally allow switches. Use case: user presses // home (switches disabled, switch to home, mDidAppSwitch now true); // user taps a home icon (coming from home so allowed, we hit here // and now allow anyone to switch again). mService.mAppSwitchesAllowedTime = 0; } else { mService.mDidAppSwitch = true; } mService.doPendingActivityLaunchesLocked(false); } return startActivityUncheckedLocked(r, sourceRecord, grantedUriPermissions, grantedMode, onlyIfNeeded, true); } final int startActivityUncheckedLocked(ActivityRecord r, ActivityRecord sourceRecord, Uri[] grantedUriPermissions, int grantedMode, boolean onlyIfNeeded, boolean doResume) { final Intent intent = r.intent; final int callingUid = r.launchedFromUid; int launchFlags = intent.getFlags(); // We'll invoke onUserLeaving before onPause only if the launching // activity did not explicitly state that this is an automated launch. mUserLeaving = (launchFlags&Intent.FLAG_ACTIVITY_NO_USER_ACTION) == 0; if (DEBUG_USER_LEAVING) Slog.v(TAG, "startActivity() => mUserLeaving=" + mUserLeaving); // If the caller has asked not to resume at this point, we make note // of this in the record so that we can skip it when trying to find // the top running activity. if (!doResume) { r.delayedResume = true; } ActivityRecord notTop = (launchFlags&Intent.FLAG_ACTIVITY_PREVIOUS_IS_TOP) != 0 ? r : null; // If the onlyIfNeeded flag is set, then we can do this if the activity // being launched is the same as the one making the call... or, as // a special case, if we do not know the caller then we count the // current top activity as the caller. if (onlyIfNeeded) { ActivityRecord checkedCaller = sourceRecord; if (checkedCaller == null) { checkedCaller = topRunningNonDelayedActivityLocked(notTop); } if (!checkedCaller.realActivity.equals(r.realActivity)) { // Caller is not the same as launcher, so always needed. onlyIfNeeded = false; } } if (sourceRecord == null) { // This activity is not being started from another... in this // case we -always- start a new task. if ((launchFlags&Intent.FLAG_ACTIVITY_NEW_TASK) == 0) { Slog.w(TAG, "startActivity called from non-Activity context; forcing Intent.FLAG_ACTIVITY_NEW_TASK for: " + intent); launchFlags |= Intent.FLAG_ACTIVITY_NEW_TASK; } } else if (sourceRecord.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { // The original activity who is starting us is running as a single // instance... this new activity it is starting must go on its // own task. launchFlags |= Intent.FLAG_ACTIVITY_NEW_TASK; } else if (r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || r.launchMode == ActivityInfo.LAUNCH_SINGLE_TASK) { // The activity being started is a single instance... it always // gets launched into its own task. launchFlags |= Intent.FLAG_ACTIVITY_NEW_TASK; } if (r.resultTo != null && (launchFlags&Intent.FLAG_ACTIVITY_NEW_TASK) != 0) { // For whatever reason this activity is being launched into a new // task... yet the caller has requested a result back. Well, that // is pretty messed up, so instead immediately send back a cancel // and let the new task continue launched as normal without a // dependency on its originator. Slog.w(TAG, "Activity is launching as a new task, so cancelling activity result."); sendActivityResultLocked(-1, r.resultTo, r.resultWho, r.requestCode, Activity.RESULT_CANCELED, null); r.resultTo = null; } boolean addingToTask = false; if (((launchFlags&Intent.FLAG_ACTIVITY_NEW_TASK) != 0 && (launchFlags&Intent.FLAG_ACTIVITY_MULTIPLE_TASK) == 0) || r.launchMode == ActivityInfo.LAUNCH_SINGLE_TASK || r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { // If bring to front is requested, and no result is requested, and // we can find a task that was started with this same // component, then instead of launching bring that one to the front. if (r.resultTo == null) { // See if there is a task to bring to the front. If this is // a SINGLE_INSTANCE activity, there can be one and only one // instance of it in the history, and it is always in its own // unique task, so we do a special search. ActivityRecord taskTop = r.launchMode != ActivityInfo.LAUNCH_SINGLE_INSTANCE ? findTaskLocked(intent, r.info) : findActivityLocked(intent, r.info); if (taskTop != null) { if (taskTop.task.intent == null) { // This task was started because of movement of // the activity based on affinity... now that we // are actually launching it, we can assign the // base intent. taskTop.task.setIntent(intent, r.info); } // If the target task is not in the front, then we need // to bring it to the front... except... well, with // SINGLE_TASK_LAUNCH it's not entirely clear. We'd like // to have the same behavior as if a new instance was // being started, which means not bringing it to the front // if the caller is not itself in the front. ActivityRecord curTop = topRunningNonDelayedActivityLocked(notTop); if (curTop != null && curTop.task != taskTop.task) { r.intent.addFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT); boolean callerAtFront = sourceRecord == null || curTop.task == sourceRecord.task; if (callerAtFront) { // We really do want to push this one into the // user's face, right now. moveTaskToFrontLocked(taskTop.task, r); } } // If the caller has requested that the target task be // reset, then do so. if ((launchFlags&Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { taskTop = resetTaskIfNeededLocked(taskTop, r); } if (onlyIfNeeded) { // We don't need to start a new activity, and // the client said not to do anything if that // is the case, so this is it! And for paranoia, make // sure we have correctly resumed the top activity. if (doResume) { resumeTopActivityLocked(null); } return START_RETURN_INTENT_TO_CALLER; } if ((launchFlags&Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0 || r.launchMode == ActivityInfo.LAUNCH_SINGLE_TASK || r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { // In this situation we want to remove all activities // from the task up to the one being started. In most // cases this means we are resetting the task to its // initial state. ActivityRecord top = performClearTaskLocked( taskTop.task.taskId, r, launchFlags, true); if (top != null) { if (top.frontOfTask) { // Activity aliases may mean we use different // intents for the top activity, so make sure // the task now has the identity of the new // intent. top.task.setIntent(r.intent, r.info); } logStartActivity(EventLogTags.AM_NEW_INTENT, r, top.task); top.deliverNewIntentLocked(callingUid, r.intent); } else { // A special case: we need to // start the activity because it is not currently // running, and the caller has asked to clear the // current task to have this activity at the top. addingToTask = true; // Now pretend like this activity is being started // by the top of its task, so it is put in the // right place. sourceRecord = taskTop; } } else if (r.realActivity.equals(taskTop.task.realActivity)) { // In this case the top activity on the task is the // same as the one being launched, so we take that // as a request to bring the task to the foreground. // If the top activity in the task is the root // activity, deliver this new intent to it if it // desires. if ((launchFlags&Intent.FLAG_ACTIVITY_SINGLE_TOP) != 0 && taskTop.realActivity.equals(r.realActivity)) { logStartActivity(EventLogTags.AM_NEW_INTENT, r, taskTop.task); if (taskTop.frontOfTask) { taskTop.task.setIntent(r.intent, r.info); } taskTop.deliverNewIntentLocked(callingUid, r.intent); } else if (!r.intent.filterEquals(taskTop.task.intent)) { // In this case we are launching the root activity // of the task, but with a different intent. We // should start a new instance on top. addingToTask = true; sourceRecord = taskTop; } } else if ((launchFlags&Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) == 0) { // In this case an activity is being launched in to an // existing task, without resetting that task. This // is typically the situation of launching an activity // from a notification or shortcut. We want to place // the new activity on top of the current task. addingToTask = true; sourceRecord = taskTop; } else if (!taskTop.task.rootWasReset) { // In this case we are launching in to an existing task // that has not yet been started from its front door. // The current task has been brought to the front. // Ideally, we'd probably like to place this new task // at the bottom of its stack, but that's a little hard // to do with the current organization of the code so // for now we'll just drop it. taskTop.task.setIntent(r.intent, r.info); } if (!addingToTask) { // We didn't do anything... but it was needed (a.k.a., client // don't use that intent!) And for paranoia, make // sure we have correctly resumed the top activity. if (doResume) { resumeTopActivityLocked(null); } return START_TASK_TO_FRONT; } } } } //String uri = r.intent.toURI(); //Intent intent2 = new Intent(uri); //Slog.i(TAG, "Given intent: " + r.intent); //Slog.i(TAG, "URI is: " + uri); //Slog.i(TAG, "To intent: " + intent2); if (r.packageName != null) { // If the activity being launched is the same as the one currently // at the top, then we need to check if it should only be launched // once. ActivityRecord top = topRunningNonDelayedActivityLocked(notTop); if (top != null && r.resultTo == null) { if (top.realActivity.equals(r.realActivity)) { if (top.app != null && top.app.thread != null) { if ((launchFlags&Intent.FLAG_ACTIVITY_SINGLE_TOP) != 0 || r.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP || r.launchMode == ActivityInfo.LAUNCH_SINGLE_TASK) { logStartActivity(EventLogTags.AM_NEW_INTENT, top, top.task); // For paranoia, make sure we have correctly // resumed the top activity. if (doResume) { resumeTopActivityLocked(null); } if (onlyIfNeeded) { // We don't need to start a new activity, and // the client said not to do anything if that // is the case, so this is it! return START_RETURN_INTENT_TO_CALLER; } top.deliverNewIntentLocked(callingUid, r.intent); return START_DELIVERED_TO_TOP; } } } } } else { if (r.resultTo != null) { sendActivityResultLocked(-1, r.resultTo, r.resultWho, r.requestCode, Activity.RESULT_CANCELED, null); } return START_CLASS_NOT_FOUND; } boolean newTask = false; // Should this be considered a new task? if (r.resultTo == null && !addingToTask && (launchFlags&Intent.FLAG_ACTIVITY_NEW_TASK) != 0) { // todo: should do better management of integers. mService.mCurTask++; if (mService.mCurTask <= 0) { mService.mCurTask = 1; } r.task = new TaskRecord(mService.mCurTask, r.info, intent, (r.info.flags&ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0); if (DEBUG_TASKS) Slog.v(TAG, "Starting new activity " + r + " in new task " + r.task); newTask = true; if (mMainStack) { mService.addRecentTaskLocked(r.task); } } else if (sourceRecord != null) { if (!addingToTask && (launchFlags&Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { // In this case, we are adding the activity to an existing // task, but the caller has asked to clear that task if the // activity is already running. ActivityRecord top = performClearTaskLocked( sourceRecord.task.taskId, r, launchFlags, true); if (top != null) { logStartActivity(EventLogTags.AM_NEW_INTENT, r, top.task); top.deliverNewIntentLocked(callingUid, r.intent); // For paranoia, make sure we have correctly // resumed the top activity. if (doResume) { resumeTopActivityLocked(null); } return START_DELIVERED_TO_TOP; } } else if (!addingToTask && (launchFlags&Intent.FLAG_ACTIVITY_REORDER_TO_FRONT) != 0) { // In this case, we are launching an activity in our own task // that may already be running somewhere in the history, and // we want to shuffle it to the front of the stack if so. int where = findActivityInHistoryLocked(r, sourceRecord.task.taskId); if (where >= 0) { ActivityRecord top = moveActivityToFrontLocked(where); logStartActivity(EventLogTags.AM_NEW_INTENT, r, top.task); top.deliverNewIntentLocked(callingUid, r.intent); if (doResume) { resumeTopActivityLocked(null); } return START_DELIVERED_TO_TOP; } } // An existing activity is starting this new activity, so we want // to keep the new one in the same task as the one that is starting // it. r.task = sourceRecord.task; if (DEBUG_TASKS) Slog.v(TAG, "Starting new activity " + r + " in existing task " + r.task); } else { // This not being started from an existing activity, and not part // of a new task... just put it in the top task, though these days // this case should never happen. final int N = mHistory.size(); ActivityRecord prev = N > 0 ? (ActivityRecord)mHistory.get(N-1) : null; r.task = prev != null ? prev.task : new TaskRecord(mService.mCurTask, r.info, intent, (r.info.flags&ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0); if (DEBUG_TASKS) Slog.v(TAG, "Starting new activity " + r + " in new guessed " + r.task); } if (grantedUriPermissions != null && callingUid > 0) { for (int i=0; i= 0) { // Caller is requesting a result. newIntent.putExtra(HeavyWeightSwitcherActivity.KEY_HAS_RESULT, true); } newIntent.putExtra(HeavyWeightSwitcherActivity.KEY_INTENT, new IntentSender(target)); if (mService.mHeavyWeightProcess.activities.size() > 0) { ActivityRecord hist = mService.mHeavyWeightProcess.activities.get(0); newIntent.putExtra(HeavyWeightSwitcherActivity.KEY_CUR_APP, hist.packageName); newIntent.putExtra(HeavyWeightSwitcherActivity.KEY_CUR_TASK, hist.task.taskId); } newIntent.putExtra(HeavyWeightSwitcherActivity.KEY_NEW_APP, aInfo.packageName); newIntent.setFlags(intent.getFlags()); newIntent.setClassName("android", HeavyWeightSwitcherActivity.class.getName()); intent = newIntent; resolvedType = null; caller = null; callingUid = Binder.getCallingUid(); callingPid = Binder.getCallingPid(); componentSpecified = true; try { ResolveInfo rInfo = AppGlobals.getPackageManager().resolveIntent( intent, null, PackageManager.MATCH_DEFAULT_ONLY | ActivityManagerService.STOCK_PM_FLAGS); aInfo = rInfo != null ? rInfo.activityInfo : null; } catch (RemoteException e) { aInfo = null; } } } } int res = startActivityLocked(caller, intent, resolvedType, grantedUriPermissions, grantedMode, aInfo, resultTo, resultWho, requestCode, callingPid, callingUid, onlyIfNeeded, componentSpecified); if (mConfigWillChange && mMainStack) { // If the caller also wants to switch to a new configuration, // do so now. This allows a clean switch, as we are waiting // for the current activity to pause (so we will not destroy // it), and have not yet started the next activity. mService.enforceCallingPermission(android.Manifest.permission.CHANGE_CONFIGURATION, "updateConfiguration()"); mConfigWillChange = false; if (DEBUG_CONFIGURATION) Slog.v(TAG, "Updating to new configuration after starting activity."); mService.updateConfigurationLocked(config, null); } Binder.restoreCallingIdentity(origId); if (outResult != null) { outResult.result = res; if (res == IActivityManager.START_SUCCESS) { mWaitingActivityLaunched.add(outResult); do { try { mService.wait(); } catch (InterruptedException e) { } } while (!outResult.timeout && outResult.who == null); } else if (res == IActivityManager.START_TASK_TO_FRONT) { ActivityRecord r = this.topRunningActivityLocked(null); if (r.nowVisible) { outResult.timeout = false; outResult.who = new ComponentName(r.info.packageName, r.info.name); outResult.totalTime = 0; outResult.thisTime = 0; } else { outResult.thisTime = SystemClock.uptimeMillis(); mWaitingActivityVisible.add(outResult); do { try { mService.wait(); } catch (InterruptedException e) { } } while (!outResult.timeout && outResult.who == null); } } } return res; } } void reportActivityLaunchedLocked(boolean timeout, ActivityRecord r, long thisTime, long totalTime) { for (int i=mWaitingActivityLaunched.size()-1; i>=0; i--) { WaitResult w = mWaitingActivityLaunched.get(i); w.timeout = timeout; if (r != null) { w.who = new ComponentName(r.info.packageName, r.info.name); } w.thisTime = thisTime; w.totalTime = totalTime; } mService.notifyAll(); } void reportActivityVisibleLocked(ActivityRecord r) { for (int i=mWaitingActivityVisible.size()-1; i>=0; i--) { WaitResult w = mWaitingActivityVisible.get(i); w.timeout = false; if (r != null) { w.who = new ComponentName(r.info.packageName, r.info.name); } w.totalTime = SystemClock.uptimeMillis() - w.thisTime; w.thisTime = w.totalTime; } mService.notifyAll(); } 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()); } 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 list = new ArrayList(); list.add(new ResultInfo(resultWho, requestCode, resultCode, data)); r.app.thread.scheduleSendResult(r, list); return; } catch (Exception e) { Slog.w(TAG, "Exception thrown sending result to " + r, e); } } r.addResultLocked(null, resultWho, requestCode, resultCode, data); } private 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) { requestFinishActivityLocked(r, Activity.RESULT_CANCELED, null, "no-history"); } } else if (r.app != null && r.app.thread != null) { if (mMainStack) { if (mService.mFocusedActivity == r) { mService.setFocusedActivityLocked(topRunningActivityLocked(null)); } } r.resumeKeyDispatchingLocked(); try { r.stopped = false; r.state = ActivityState.STOPPING; if (DEBUG_VISBILITY) Slog.v( TAG, "Stopping visible=" + r.visible + " for " + r); if (!r.visible) { mService.mWindowManager.setAppVisibility(r, false); } r.app.thread.scheduleStopActivity(r, r.visible, r.configChangeFlags); } 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; r.state = ActivityState.STOPPED; if (r.configDestroy) { destroyActivityLocked(r, true); } } } } final ArrayList processStoppingActivitiesLocked( boolean remove) { int N = mStoppingActivities.size(); if (N <= 0) return null; ArrayList stops = null; final boolean nowVisible = mResumedActivity != null && mResumedActivity.nowVisible && !mResumedActivity.waitingVisible; for (int i=0; i(); } stops.add(s); mStoppingActivities.remove(i); N--; i--; } } return stops; } final void activityIdleInternal(IBinder token, boolean fromTimeout, Configuration config) { if (localLOGV) Slog.v(TAG, "Activity idle: " + token); ArrayList stops = null; ArrayList finishes = null; ArrayList thumbnails = null; int NS = 0; int NF = 0; int NT = 0; IApplicationThread sendThumbnail = null; boolean booting = false; boolean enableScreen = false; synchronized (mService) { if (token != null) { mHandler.removeMessages(IDLE_TIMEOUT_MSG, token); } // Get the activity record. int index = indexOfTokenLocked(token); if (index >= 0) { ActivityRecord r = (ActivityRecord)mHistory.get(index); if (fromTimeout) { reportActivityLaunchedLocked(fromTimeout, r, -1, -1); } // This is a hack to semi-deal with a race condition // in the client where it can be constructed with a // newer configuration from when we asked it to launch. // We'll update with whatever configuration it now says // it used to launch. if (config != null) { r.configuration = config; } // No longer need to keep the device awake. if (mResumedActivity == r && mLaunchingActivity.isHeld()) { mHandler.removeMessages(LAUNCH_TIMEOUT_MSG); mLaunchingActivity.release(); } // We are now idle. If someone is waiting for a thumbnail from // us, we can now deliver. r.idle = true; mService.scheduleAppGcsLocked(); if (r.thumbnailNeeded && r.app != null && r.app.thread != null) { sendThumbnail = r.app.thread; r.thumbnailNeeded = false; } // If this activity is fullscreen, set up to hide those under it. if (DEBUG_VISBILITY) Slog.v(TAG, "Idle activity for " + r); ensureActivitiesVisibleLocked(null, 0); //Slog.i(TAG, "IDLE: mBooted=" + mBooted + ", fromTimeout=" + fromTimeout); if (mMainStack) { if (!mService.mBooted && !fromTimeout) { mService.mBooted = true; enableScreen = true; } } } else if (fromTimeout) { reportActivityLaunchedLocked(fromTimeout, null, -1, -1); } // Atomically retrieve all of the other things to do. stops = processStoppingActivitiesLocked(true); NS = stops != null ? stops.size() : 0; if ((NF=mFinishingActivities.size()) > 0) { finishes = new ArrayList(mFinishingActivities); mFinishingActivities.clear(); } if ((NT=mService.mCancelledThumbnails.size()) > 0) { thumbnails = new ArrayList(mService.mCancelledThumbnails); mService.mCancelledThumbnails.clear(); } if (mMainStack) { booting = mService.mBooting; mService.mBooting = false; } } int i; // Send thumbnail if requested. if (sendThumbnail != null) { try { sendThumbnail.requestThumbnail(token); } catch (Exception e) { Slog.w(TAG, "Exception thrown when requesting thumbnail", e); mService.sendPendingThumbnail(null, token, null, null, true); } } // Stop any activities that are scheduled to do so but have been // waiting for the next one to start. for (i=0; i 0) { // There are clients waiting to receive thumbnails so, in case // this is an activity that someone is waiting for, add it // to the pending list so we can correctly update the clients. mService.mCancelledThumbnails.add(r); } if (mResumedActivity == r) { boolean endTask = index <= 0 || ((ActivityRecord)mHistory.get(index-1)).task != r.task; if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare close transition: finishing " + r); mService.mWindowManager.prepareAppTransition(endTask ? WindowManagerPolicy.TRANSIT_TASK_CLOSE : WindowManagerPolicy.TRANSIT_ACTIVITY_CLOSE); // Tell window manager to prepare for this one to be removed. mService.mWindowManager.setAppVisibility(r, 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); } } 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, index, FINISH_AFTER_PAUSE) == null; } else { if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); } return false; } private static final int FINISH_IMMEDIATELY = 0; private static final int FINISH_AFTER_PAUSE = 1; private static final int FINISH_AFTER_VISIBLE = 2; private final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode) { final int index = indexOfTokenLocked(r); if (index < 0) { return null; } return finishCurrentActivityLocked(r, index, mode); } private final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int index, int mode) { // 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 (!mStoppingActivities.contains(r)) { mStoppingActivities.add(r); if (mStoppingActivities.size() > 3) { // If we already have a few activities waiting to stop, // then give up on things going idle and start clearing // them out. Message msg = Message.obtain(); msg.what = IDLE_NOW_MSG; mHandler.sendMessage(msg); } } r.state = ActivityState.STOPPING; mService.updateOomAdjLocked(); return r; } // make sure the record is cleaned out of other places. mStoppingActivities.remove(r); mWaitingVisibleActivities.remove(r); if (mResumedActivity == r) { mResumedActivity = null; } final ActivityState prevState = r.state; 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. return destroyActivityLocked(r, true) ? null : r; } else { // 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); mFinishingActivities.add(r); resumeTopActivityLocked(null); } return r; } /** * 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) { if (mResumedActivity == r) { mResumedActivity = null; } if (mService.mFocusedActivity == r) { mService.mFocusedActivity = null; } r.configDestroy = false; r.frozenBeforeDestroy = false; // 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. mFinishingActivities.remove(r); mWaitingVisibleActivities.remove(r); // Remove any pending results. if (r.finishing && r.pendingResults != null) { for (WeakReference apr : r.pendingResults) { PendingIntentRecord rec = apr.get(); if (rec != null) { mService.cancelIntentSenderLocked(rec, false); } } r.pendingResults.clear(); r.pendingResults = null; } if (cleanServices) { cleanUpActivityServicesLocked(r); } if (mService.mPendingThumbnails.size() > 0) { // There are clients waiting to receive thumbnails so, in case // this is an activity that someone is waiting for, add it // to the pending list so we can correctly update the clients. mService.mCancelledThumbnails.add(r); } // Get rid of any pending idle timeouts. mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); mHandler.removeMessages(IDLE_TIMEOUT_MSG, r); } private final void removeActivityFromHistoryLocked(ActivityRecord r) { if (r.state != ActivityState.DESTROYED) { mHistory.remove(r); r.inHistory = false; r.resultTo = null; r.state = ActivityState.DESTROYED; mService.mWindowManager.removeAppToken(r); if (VALIDATE_TOKENS) { mService.mWindowManager.validateAppTokens(mHistory); } 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 it = r.connections.iterator(); while (it.hasNext()) { ConnectionRecord c = it.next(); mService.removeConnectionLocked(c, null, r); } r.connections.clear(); r.connections = null; } } /** * 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) { if (DEBUG_SWITCH) Slog.v( TAG, "Removing activity: token=" + r + ", app=" + (r.app != null ? r.app.processName : "(null)")); EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, System.identityHashCode(r), r.task.taskId, r.shortComponentName); boolean removedFromHistory = false; cleanUpActivityLocked(r, false); final boolean hadApp = r.app != null; if (hadApp) { if (removeFromApp) { int idx = r.app.activities.indexOf(r); if (idx >= 0) { r.app.activities.remove(idx); } 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.size() == 0) { // No longer have activities, so update location in // LRU list. mService.updateLruProcessLocked(r.app, true, false); } } boolean skipDestroy = false; try { if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); r.app.thread.scheduleDestroyActivity(r, 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.app = null; r.nowVisible = false; if (r.finishing && !skipDestroy) { r.state = ActivityState.DESTROYING; Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG); msg.obj = r; mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); } else { r.state = ActivityState.DESTROYED; } } else { // remove this record from the history. if (r.finishing) { removeActivityFromHistoryLocked(r); removedFromHistory = true; } else { r.state = ActivityState.DESTROYED; } } r.configChangeFlags = 0; if (!mLRUActivities.remove(r) && hadApp) { Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); } return removedFromHistory; } final void activityDestroyed(IBinder token) { synchronized (mService) { mHandler.removeMessages(DESTROY_TIMEOUT_MSG, token); int index = indexOfTokenLocked(token); if (index >= 0) { ActivityRecord r = (ActivityRecord)mHistory.get(index); if (r.state == ActivityState.DESTROYING) { final long origId = Binder.clearCallingIdentity(); removeActivityFromHistoryLocked(r); Binder.restoreCallingIdentity(origId); } } } } private static void removeHistoryRecordsForAppLocked(ArrayList list, ProcessRecord app) { int i = list.size(); if (localLOGV) Slog.v( TAG, "Removing app " + app + " from list " + list + " with " + i + " entries"); while (i > 0) { i--; ActivityRecord r = (ActivityRecord)list.get(i); if (localLOGV) Slog.v( TAG, "Record #" + i + " " + r + ": app=" + r.app); if (r.app == app) { if (localLOGV) Slog.v(TAG, "Removing this entry!"); list.remove(i); } } } void removeHistoryRecordsForAppLocked(ProcessRecord app) { removeHistoryRecordsForAppLocked(mLRUActivities, app); removeHistoryRecordsForAppLocked(mStoppingActivities, app); removeHistoryRecordsForAppLocked(mWaitingVisibleActivities, app); removeHistoryRecordsForAppLocked(mFinishingActivities, app); } final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason) { if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); final int task = tr.taskId; int top = mHistory.size()-1; if (top < 0 || ((ActivityRecord)mHistory.get(top)).task.taskId == task) { // nothing to do! return; } ArrayList moved = new ArrayList(); // Applying the affinities may have removed entries from the history, // so get the size again. top = mHistory.size()-1; int pos = top; // Shift all activities with this task up to the top // of the stack, keeping them in the same internal order. boolean first = true; while (pos >= 0) { ActivityRecord r = (ActivityRecord)mHistory.get(pos); if (localLOGV) Slog.v( TAG, "At " + pos + " ckp " + r.task + ": " + r); if (r.task.taskId == task) { if (localLOGV) Slog.v(TAG, "Removing and adding at " + top); mHistory.remove(pos); mHistory.add(top, r); moved.add(0, r); top--; if (first && mMainStack) { mService.addRecentTaskLocked(r.task); first = false; } } pos--; } if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); if (reason != null && (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_NONE); ActivityRecord r = topRunningActivityLocked(null); if (r != null) { mNoAnimActivities.add(r); } } else { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_TASK_TO_FRONT); } mService.mWindowManager.moveAppTokensToTop(moved); if (VALIDATE_TOKENS) { mService.mWindowManager.validateAppTokens(mHistory); } finishTaskMoveLocked(task); EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, task); } private final void finishTaskMoveLocked(int task) { resumeTopActivityLocked(null); } /** * 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 task The taskId to collect and move to the bottom. * @return Returns true if the move completed, false if not. */ final boolean moveTaskToBackLocked(int task, ActivityRecord reason) { Slog.i(TAG, "moveTaskToBack: " + task); // 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 (mMainStack && mService.mController != null) { ActivityRecord next = topRunningActivityLocked(null, task); 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; } if (!moveOK) { return false; } } } ArrayList moved = new ArrayList(); if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to back transition: task=" + task); final int N = mHistory.size(); int bottom = 0; int pos = 0; // Shift all activities with this task down to the bottom // of the stack, keeping them in the same internal order. while (pos < N) { ActivityRecord r = (ActivityRecord)mHistory.get(pos); if (localLOGV) Slog.v( TAG, "At " + pos + " ckp " + r.task + ": " + r); if (r.task.taskId == task) { if (localLOGV) Slog.v(TAG, "Removing and adding at " + (N-1)); mHistory.remove(pos); mHistory.add(bottom, r); moved.add(r); bottom++; } pos++; } if (reason != null && (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_NONE); ActivityRecord r = topRunningActivityLocked(null); if (r != null) { mNoAnimActivities.add(r); } } else { mService.mWindowManager.prepareAppTransition(WindowManagerPolicy.TRANSIT_TASK_TO_BACK); } mService.mWindowManager.moveAppTokensToBottom(moved); if (VALIDATE_TOKENS) { mService.mWindowManager.validateAppTokens(mHistory); } finishTaskMoveLocked(task); return true; } private final void logStartActivity(int tag, ActivityRecord r, TaskRecord task) { EventLog.writeEvent(tag, System.identityHashCode(r), task.taskId, r.shortComponentName, r.intent.getAction(), r.intent.getType(), r.intent.getDataString(), 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) { 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; // 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); return true; } // Figure out what has changed between the two configurations. int changes = oldConfig.diff(newConfig); 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.configChanges) + ", newConfig=" + newConfig); } if ((changes&(~r.info.configChanges)) != 0) { // Aha, the activity isn't handling the change, so DIE DIE DIE. r.configChangeFlags |= changes; r.startFreezingScreenLocked(r.app, globalChanges); if (r.app == null || r.app.thread == null) { if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, "Switch is destroying non-running " + r); destroyActivityLocked(r, true); } 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, "Switch 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, "Switch is restarting resumed " + r); relaunchActivityLocked(r, r.configChangeFlags, true); r.configChangeFlags = 0; } else { if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, "Switch is restarting 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); } catch (RemoteException e) { // If process died, whatever. } } r.stopFreezingScreenLocked(false); return true; } private final boolean relaunchActivityLocked(ActivityRecord r, int changes, boolean andResume) { List results = null; List 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, System.identityHashCode(r), r.task.taskId, r.shortComponentName); r.startFreezingScreenLocked(r.app, 0); try { if (DEBUG_SWITCH) Slog.i(TAG, "Switch is restarting resumed " + r); r.app.thread.scheduleRelaunchActivity(r, results, newIntents, changes, !andResume, 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) { return false; } if (andResume) { r.results = null; r.newIntents = null; if (mMainStack) { mService.reportResumedActivityLocked(r); } } return true; } }