/* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.server.am; import static android.app.ActivityManager.StackId.DOCKED_STACK_ID; import static android.app.ActivityManager.StackId.FREEFORM_WORKSPACE_STACK_ID; import static android.app.ActivityManager.StackId.FULLSCREEN_WORKSPACE_STACK_ID; import static android.app.ActivityManager.StackId.HOME_STACK_ID; import static android.app.ActivityManager.StackId.INVALID_STACK_ID; import static android.app.ActivityManager.StackId.PINNED_STACK_ID; import static android.content.pm.ActivityInfo.CONFIG_ORIENTATION; import static android.content.pm.ActivityInfo.CONFIG_SCREEN_LAYOUT; import static android.content.pm.ActivityInfo.CONFIG_SCREEN_SIZE; import static android.content.pm.ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE; import static android.content.pm.ActivityInfo.FLAG_RESUME_WHILE_PAUSING; import static android.content.pm.ActivityInfo.FLAG_SHOW_FOR_ALL_USERS; import static android.content.res.Configuration.SCREENLAYOUT_UNDEFINED; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_ADD_REMOVE; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_ALL; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_APP; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CLEANUP; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CONFIGURATION; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CONTAINERS; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_LOCKSCREEN; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_PAUSE; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_RELEASE; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_RESULTS; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SAVED_STATE; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SCREENSHOTS; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_STACK; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_STATES; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SWITCH; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_TASKS; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_TRANSITION; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_USER_LEAVING; import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_VISIBILITY; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_ADD_REMOVE; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_APP; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CLEANUP; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CONFIGURATION; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CONTAINERS; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_PAUSE; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_RELEASE; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_RESULTS; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SAVED_STATE; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SCREENSHOTS; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_STACK; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_STATES; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SWITCH; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_TASKS; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_TRANSITION; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_USER_LEAVING; import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_VISIBILITY; import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM; import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME; import static com.android.server.am.ActivityManagerService.LOCK_SCREEN_SHOWN; import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE; import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE; import static com.android.server.am.ActivityRecord.STARTING_WINDOW_REMOVED; import static com.android.server.am.ActivityRecord.STARTING_WINDOW_SHOWN; import static com.android.server.am.ActivityStackSupervisor.FindTaskResult; import static com.android.server.am.ActivityStackSupervisor.ON_TOP; import static com.android.server.am.ActivityStackSupervisor.PRESERVE_WINDOWS; import static com.android.server.wm.AppTransition.TRANSIT_ACTIVITY_CLOSE; import static com.android.server.wm.AppTransition.TRANSIT_ACTIVITY_OPEN; import static com.android.server.wm.AppTransition.TRANSIT_NONE; import static com.android.server.wm.AppTransition.TRANSIT_TASK_CLOSE; import static com.android.server.wm.AppTransition.TRANSIT_TASK_OPEN; import static com.android.server.wm.AppTransition.TRANSIT_TASK_OPEN_BEHIND; import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_BACK; import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_FRONT; import android.app.Activity; import android.app.ActivityManager; import android.app.ActivityManager.RunningTaskInfo; import android.app.ActivityManager.StackId; import android.app.ActivityOptions; import android.app.AppGlobals; import android.app.IActivityController; import android.app.ResultInfo; import android.content.ComponentName; import android.content.Intent; import android.content.pm.ActivityInfo; import android.content.pm.ApplicationInfo; import android.content.res.Configuration; import android.graphics.Bitmap; import android.graphics.Point; import android.graphics.Rect; import android.net.Uri; import android.os.Binder; import android.os.Bundle; import android.os.Debug; import android.os.Handler; import android.os.IBinder; import android.os.Looper; import android.os.Message; import android.os.PersistableBundle; import android.os.RemoteException; import android.os.SystemClock; import android.os.Trace; import android.os.UserHandle; import android.service.voice.IVoiceInteractionSession; import android.util.ArraySet; import android.util.EventLog; import android.util.Log; import android.util.Slog; import android.view.Display; import com.android.internal.app.IVoiceInteractor; import com.android.internal.content.ReferrerIntent; import com.android.internal.os.BatteryStatsImpl; import com.android.server.Watchdog; import com.android.server.am.ActivityManagerService.ItemMatcher; import com.android.server.am.ActivityStackSupervisor.ActivityContainer; import com.android.server.wm.TaskGroup; import com.android.server.wm.WindowManagerService; import java.io.FileDescriptor; import java.io.PrintWriter; import java.lang.ref.WeakReference; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Objects; import java.util.Set; /** * State and management of a single stack of activities. */ final class ActivityStack { private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityStack" : TAG_AM; private static final String TAG_ADD_REMOVE = TAG + POSTFIX_ADD_REMOVE; private static final String TAG_APP = TAG + POSTFIX_APP; private static final String TAG_CLEANUP = TAG + POSTFIX_CLEANUP; private static final String TAG_CONFIGURATION = TAG + POSTFIX_CONFIGURATION; private static final String TAG_CONTAINERS = TAG + POSTFIX_CONTAINERS; private static final String TAG_PAUSE = TAG + POSTFIX_PAUSE; private static final String TAG_RELEASE = TAG + POSTFIX_RELEASE; private static final String TAG_RESULTS = TAG + POSTFIX_RESULTS; private static final String TAG_SAVED_STATE = TAG + POSTFIX_SAVED_STATE; private static final String TAG_SCREENSHOTS = TAG + POSTFIX_SCREENSHOTS; private static final String TAG_STACK = TAG + POSTFIX_STACK; private static final String TAG_STATES = TAG + POSTFIX_STATES; private static final String TAG_SWITCH = TAG + POSTFIX_SWITCH; private static final String TAG_TASKS = TAG + POSTFIX_TASKS; private static final String TAG_TRANSITION = TAG + POSTFIX_TRANSITION; private static final String TAG_USER_LEAVING = TAG + POSTFIX_USER_LEAVING; private static final String TAG_VISIBILITY = TAG + POSTFIX_VISIBILITY; private static final boolean VALIDATE_TOKENS = false; // Ticks during which we check progress while waiting for an app to launch. static final int LAUNCH_TICK = 500; // How long we wait until giving up on the last activity to pause. This // is short because it directly impacts the responsiveness of starting the // next activity. static final int PAUSE_TIMEOUT = 500; // How long we wait for the activity to tell us it has stopped before // giving up. This is a good amount of time because we really need this // from the application in order to get its saved state. static final int STOP_TIMEOUT = 10 * 1000; // How long we wait until giving up on an activity telling us it has // finished destroying itself. static final int DESTROY_TIMEOUT = 10 * 1000; // How long until we reset a task when the user returns to it. Currently // disabled. static final long ACTIVITY_INACTIVE_RESET_TIME = 0; // How long between activity launches that we consider safe to not warn // the user about an unexpected activity being launched on top. static final long START_WARN_TIME = 5 * 1000; // Set to false to disable the preview that is shown while a new activity // is being started. static final boolean SHOW_APP_STARTING_PREVIEW = true; // How long to wait for all background Activities to redraw following a call to // convertToTranslucent(). static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; // How many activities have to be scheduled to stop to force a stop pass. private static final int MAX_STOPPING_TO_FORCE = 3; enum ActivityState { INITIALIZING, RESUMED, PAUSING, PAUSED, STOPPING, STOPPED, FINISHING, DESTROYING, DESTROYED } // Stack is not considered visible. static final int STACK_INVISIBLE = 0; // Stack is considered visible static final int STACK_VISIBLE = 1; // Stack is considered visible, but only becuase it has activity that is visible behind other // activities and there is a specific combination of stacks. static final int STACK_VISIBLE_ACTIVITY_BEHIND = 2; /* The various modes for the method {@link #removeTask}. */ // Task is being completely removed from all stacks in the system. static final int REMOVE_TASK_MODE_DESTROYING = 0; // Task is being removed from this stack so we can add it to another stack. In the case we are // moving we don't want to perform some operations on the task like removing it from window // manager or recents. static final int REMOVE_TASK_MODE_MOVING = 1; // Similar to {@link #REMOVE_TASK_MODE_MOVING} and the task will be added to the top of its new // stack and the new stack will be on top of all stacks. static final int REMOVE_TASK_MODE_MOVING_TO_TOP = 2; final ActivityManagerService mService; final WindowManagerService mWindowManager; private final RecentTasks mRecentTasks; /** * The back history of all previous (and possibly still * running) activities. It contains #TaskRecord objects. */ private final ArrayList mTaskHistory = new ArrayList<>(); /** * Used for validating app tokens with window manager. */ final ArrayList mValidateAppTokens = 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<>(); /** * Animations that for the current transition have requested not to * be considered for the transition animation. */ final ArrayList mNoAnimActivities = new ArrayList<>(); /** * When we are in the process of pausing an activity, before starting the * next one, this variable holds the activity that is currently being paused. */ ActivityRecord mPausingActivity = null; /** * This is the last activity that we put into the paused state. This is * used to determine if we need to do an activity transition while sleeping, * when we normally hold the top activity paused. */ ActivityRecord mLastPausedActivity = null; /** * Activities that specify No History must be removed once the user navigates away from them. * If the device goes to sleep with such an activity in the paused state then we save it here * and finish it later if another activity replaces it on wakeup. */ ActivityRecord mLastNoHistoryActivity = null; /** * Current activity that is resumed, or null if there is none. */ ActivityRecord mResumedActivity = null; /** * This is the last activity that has been started. It is only used to * identify when multiple activities are started at once so that the user * can be warned they may not be in the activity they think they are. */ ActivityRecord mLastStartedActivity = null; // The topmost Activity passed to convertToTranslucent(). When non-null it means we are // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the // Activity in mTranslucentActivityWaiting is notified via // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last // background activity being drawn then the same call will be made with a true value. ActivityRecord mTranslucentActivityWaiting = null; private ArrayList mUndrawnActivitiesBelowTopTranslucent = new ArrayList<>(); /** * Set when we know we are going to be calling updateConfiguration() * soon, so want to skip intermediate config checks. */ boolean mConfigWillChange; // Whether or not this stack covers the entire screen; by default stacks are fullscreen boolean mFullscreen = true; // Current bounds of the stack or null if fullscreen. Rect mBounds = null; boolean mUpdateBoundsDeferred; boolean mUpdateBoundsDeferredCalled; final Rect mDeferredBounds = new Rect(); final Rect mDeferredTaskBounds = new Rect(); final Rect mDeferredTaskInsetBounds = new Rect(); long mLaunchStartTime = 0; long mFullyDrawnStartTime = 0; int mCurrentUser; final int mStackId; final ActivityContainer mActivityContainer; /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ ArrayList mStacks; /** The attached Display's unique identifier, or -1 if detached */ int mDisplayId; /** Run all ActivityStacks through this */ final ActivityStackSupervisor mStackSupervisor; private final LaunchingTaskPositioner mTaskPositioner; static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; static class ScheduleDestroyArgs { final ProcessRecord mOwner; final String mReason; ScheduleDestroyArgs(ProcessRecord owner, String reason) { mOwner = owner; mReason = reason; } } final Handler mHandler; final class ActivityStackHandler extends Handler { ActivityStackHandler(Looper looper) { super(looper); } @Override public void handleMessage(Message msg) { switch (msg.what) { case PAUSE_TIMEOUT_MSG: { ActivityRecord r = (ActivityRecord)msg.obj; // We don't at this point know if the activity is fullscreen, // so we need to be conservative and assume it isn't. Slog.w(TAG, "Activity pause timeout for " + r); synchronized (mService) { if (r.app != null) { mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); } activityPausedLocked(r.appToken, true); } } break; case LAUNCH_TICK_MSG: { ActivityRecord r = (ActivityRecord)msg.obj; synchronized (mService) { if (r.continueLaunchTickingLocked()) { mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); } } } break; case DESTROY_TIMEOUT_MSG: { ActivityRecord r = (ActivityRecord)msg.obj; // We don't at this point know if the activity is fullscreen, // so we need to be conservative and assume it isn't. Slog.w(TAG, "Activity destroy timeout for " + r); synchronized (mService) { activityDestroyedLocked(r != null ? r.appToken : null, "destroyTimeout"); } } break; case STOP_TIMEOUT_MSG: { ActivityRecord r = (ActivityRecord)msg.obj; // We don't at this point know if the activity is fullscreen, // so we need to be conservative and assume it isn't. Slog.w(TAG, "Activity stop timeout for " + r); synchronized (mService) { if (r.isInHistory()) { activityStoppedLocked(r, null, null, null); } } } break; case DESTROY_ACTIVITIES_MSG: { ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; synchronized (mService) { destroyActivitiesLocked(args.mOwner, args.mReason); } } break; case TRANSLUCENT_TIMEOUT_MSG: { synchronized (mService) { notifyActivityDrawnLocked(null); } } break; case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { synchronized (mService) { final ActivityRecord r = getVisibleBehindActivity(); Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); if (r != null) { mService.killAppAtUsersRequest(r.app, null); } } } break; } } } int numActivities() { int count = 0; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { count += mTaskHistory.get(taskNdx).mActivities.size(); } return count; } ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer, RecentTasks recentTasks) { mActivityContainer = activityContainer; mStackSupervisor = activityContainer.getOuter(); mService = mStackSupervisor.mService; mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); mWindowManager = mService.mWindowManager; mStackId = activityContainer.mStackId; mCurrentUser = mService.mUserController.getCurrentUserIdLocked(); mRecentTasks = recentTasks; mTaskPositioner = mStackId == FREEFORM_WORKSPACE_STACK_ID ? new LaunchingTaskPositioner() : null; } void attachDisplay(ActivityStackSupervisor.ActivityDisplay activityDisplay, boolean onTop) { mDisplayId = activityDisplay.mDisplayId; mStacks = activityDisplay.mStacks; mBounds = mWindowManager.attachStack(mStackId, activityDisplay.mDisplayId, onTop); mFullscreen = mBounds == null; if (mTaskPositioner != null) { mTaskPositioner.setDisplay(activityDisplay.mDisplay); mTaskPositioner.configure(mBounds); } if (mStackId == DOCKED_STACK_ID) { // If we created a docked stack we want to resize it so it resizes all other stacks // in the system. mStackSupervisor.resizeDockedStackLocked( mBounds, null, null, null, null, PRESERVE_WINDOWS); } } void detachDisplay() { mDisplayId = Display.INVALID_DISPLAY; mStacks = null; if (mTaskPositioner != null) { mTaskPositioner.reset(); } mWindowManager.detachStack(mStackId); if (mStackId == DOCKED_STACK_ID) { // If we removed a docked stack we want to resize it so it resizes all other stacks // in the system to fullscreen. mStackSupervisor.resizeDockedStackLocked( null, null, null, null, null, PRESERVE_WINDOWS); } } public void getDisplaySize(Point out) { mActivityContainer.mActivityDisplay.mDisplay.getSize(out); } /** * Defers updating the bounds of the stack. If the stack was resized/repositioned while * deferring, the bounds will update in {@link #continueUpdateBounds()}. */ void deferUpdateBounds() { if (!mUpdateBoundsDeferred) { mUpdateBoundsDeferred = true; mUpdateBoundsDeferredCalled = false; } } /** * Continues updating bounds after updates have been deferred. If there was a resize attempt * between {@link #deferUpdateBounds()} and {@link #continueUpdateBounds()}, the stack will * be resized to that bounds. */ void continueUpdateBounds() { final boolean wasDeferred = mUpdateBoundsDeferred; mUpdateBoundsDeferred = false; if (wasDeferred && mUpdateBoundsDeferredCalled) { mStackSupervisor.resizeStackUncheckedLocked(this, mDeferredBounds.isEmpty() ? null : mDeferredBounds, mDeferredTaskBounds.isEmpty() ? null : mDeferredTaskBounds, mDeferredTaskInsetBounds.isEmpty() ? null : mDeferredTaskInsetBounds); } } boolean updateBoundsAllowed(Rect bounds, Rect tempTaskBounds, Rect tempTaskInsetBounds) { if (!mUpdateBoundsDeferred) { return true; } if (bounds != null) { mDeferredBounds.set(bounds); } else { mDeferredBounds.setEmpty(); } if (tempTaskBounds != null) { mDeferredTaskBounds.set(tempTaskBounds); } else { mDeferredTaskBounds.setEmpty(); } if (tempTaskInsetBounds != null) { mDeferredTaskInsetBounds.set(tempTaskInsetBounds); } else { mDeferredTaskInsetBounds.setEmpty(); } mUpdateBoundsDeferredCalled = true; return false; } void setBounds(Rect bounds) { mBounds = mFullscreen ? null : new Rect(bounds); if (mTaskPositioner != null) { mTaskPositioner.configure(bounds); } } boolean okToShowLocked(ActivityRecord r) { return mStackSupervisor.okToShowLocked(r); } final ActivityRecord topRunningActivityLocked() { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(); if (r != null) { return r; } } return null; } final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); final ArrayList activities = task.mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { ActivityRecord r = activities.get(activityNdx); if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { return r; } } } return null; } /** * This is a simplified version of topRunningActivityLocked that provides a number of * optional skip-over modes. It is intended for use with the ActivityController hook only. * * @param token If non-null, any history records matching this token will be skipped. * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. * * @return Returns the HistoryRecord of the next activity on the stack. */ final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { TaskRecord task = mTaskHistory.get(taskNdx); if (task.taskId == taskId) { continue; } ArrayList activities = task.mActivities; for (int i = activities.size() - 1; i >= 0; --i) { final ActivityRecord r = activities.get(i); // Note: the taskId check depends on real taskId fields being non-zero if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { return r; } } } return null; } final ActivityRecord topActivity() { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if (!r.finishing) { return r; } } } return null; } final TaskRecord topTask() { final int size = mTaskHistory.size(); if (size > 0) { return mTaskHistory.get(size - 1); } return null; } TaskRecord taskForIdLocked(int id) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); if (task.taskId == id) { return task; } } return null; } ActivityRecord isInStackLocked(IBinder token) { final ActivityRecord r = ActivityRecord.forTokenLocked(token); return isInStackLocked(r); } ActivityRecord isInStackLocked(ActivityRecord r) { if (r == null) { return null; } final TaskRecord task = r.task; if (task != null && task.stack != null && task.mActivities.contains(r) && mTaskHistory.contains(task)) { if (task.stack != this) Slog.w(TAG, "Illegal state! task does not point to stack it is in."); return r; } return null; } final boolean updateLRUListLocked(ActivityRecord r) { final boolean hadit = mLRUActivities.remove(r); mLRUActivities.add(r); return hadit; } final boolean isHomeStack() { return mStackId == HOME_STACK_ID; } final boolean isDockedStack() { return mStackId == DOCKED_STACK_ID; } final boolean isPinnedStack() { return mStackId == PINNED_STACK_ID; } final boolean isOnHomeDisplay() { return isAttached() && mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; } void moveToFront(String reason) { moveToFront(reason, null); } /** * @param reason The reason for moving the stack to the front. * @param task If non-null, the task will be moved to the top of the stack. * */ void moveToFront(String reason, TaskRecord task) { if (!isAttached()) { return; } mStacks.remove(this); int addIndex = mStacks.size(); if (addIndex > 0) { final ActivityStack topStack = mStacks.get(addIndex - 1); if (StackId.isAlwaysOnTop(topStack.mStackId) && topStack != this) { // If the top stack is always on top, we move this stack just below it. addIndex--; } } mStacks.add(addIndex, this); // TODO(multi-display): Needs to also work if focus is moving to the non-home display. if (isOnHomeDisplay()) { mStackSupervisor.setFocusStackUnchecked(reason, this); } if (task != null) { insertTaskAtTop(task, null); } else { task = topTask(); } if (task != null) { mWindowManager.moveTaskToTop(task.taskId); } } boolean isFocusable() { if (StackId.canReceiveKeys(mStackId)) { return true; } // The stack isn't focusable. See if its top activity is focusable to force focus on the // stack. final ActivityRecord r = topRunningActivityLocked(); return r != null && r.isFocusable(); } final boolean isAttached() { return mStacks != null; } /** * Returns the top activity in any existing task matching the given Intent in the input result. * Returns null if no such task is found. */ void findTaskLocked(ActivityRecord target, FindTaskResult result) { Intent intent = target.intent; ActivityInfo info = target.info; ComponentName cls = intent.getComponent(); if (info.targetActivity != null) { cls = new ComponentName(info.packageName, info.targetActivity); } final int userId = UserHandle.getUserId(info.applicationInfo.uid); boolean isDocument = intent != null & intent.isDocument(); // If documentData is non-null then it must match the existing task data. Uri documentData = isDocument ? intent.getData() : null; if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Looking for task of " + target + " in " + this); for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); if (task.voiceSession != null) { // We never match voice sessions; those always run independently. if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": voice session"); continue; } if (task.userId != userId) { // Looking for a different task. if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": different user"); continue; } final ActivityRecord r = task.getTopActivity(); if (r == null || r.finishing || r.userId != userId || r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch root " + r); continue; } if (r.mActivityType != target.mActivityType) { if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch activity type"); continue; } final Intent taskIntent = task.intent; final Intent affinityIntent = task.affinityIntent; final boolean taskIsDocument; final Uri taskDocumentData; if (taskIntent != null && taskIntent.isDocument()) { taskIsDocument = true; taskDocumentData = taskIntent.getData(); } else if (affinityIntent != null && affinityIntent.isDocument()) { taskIsDocument = true; taskDocumentData = affinityIntent.getData(); } else { taskIsDocument = false; taskDocumentData = null; } if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Comparing existing cls=" + taskIntent.getComponent().flattenToShortString() + "/aff=" + r.task.rootAffinity + " to new cls=" + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); // TODO Refactor to remove duplications. Check if logic can be simplified. if (taskIntent != null && taskIntent.getComponent() != null && taskIntent.getComponent().compareTo(cls) == 0 && Objects.equals(documentData, taskDocumentData)) { if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!"); //dump(); if (DEBUG_TASKS) Slog.d(TAG_TASKS, "For Intent " + intent + " bringing to top: " + r.intent); result.r = r; result.matchedByRootAffinity = false; break; } else if (affinityIntent != null && affinityIntent.getComponent() != null && affinityIntent.getComponent().compareTo(cls) == 0 && Objects.equals(documentData, taskDocumentData)) { if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!"); //dump(); if (DEBUG_TASKS) Slog.d(TAG_TASKS, "For Intent " + intent + " bringing to top: " + r.intent); result.r = r; result.matchedByRootAffinity = false; break; } else if (!isDocument && !taskIsDocument && result.r == null && task.canMatchRootAffinity()) { if (task.rootAffinity.equals(target.taskAffinity)) { if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching affinity candidate!"); // It is possible for multiple tasks to have the same root affinity especially // if they are in separate stacks. We save off this candidate, but keep looking // to see if there is a better candidate. result.r = r; result.matchedByRootAffinity = true; } } else if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Not a match: " + task); } } /** * Returns the first activity (starting from the top of the stack) that * is the same as the given activity. Returns null if no such activity * is found. */ ActivityRecord findActivityLocked(Intent intent, ActivityInfo info, boolean compareIntentFilters) { ComponentName cls = intent.getComponent(); if (info.targetActivity != null) { cls = new ComponentName(info.packageName, info.targetActivity); } final int userId = UserHandle.getUserId(info.applicationInfo.uid); for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); final boolean notCurrentUserTask = !mStackSupervisor.isCurrentProfileLocked(task.userId); final ArrayList activities = task.mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { ActivityRecord r = activities.get(activityNdx); if (notCurrentUserTask && (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) { continue; } if (!r.finishing && r.userId == userId) { if (compareIntentFilters) { if (r.intent.filterEquals(intent)) { return r; } } else { if (r.intent.getComponent().equals(cls)) { return r; } } } } } return null; } /* * Move the activities around in the stack to bring a user to the foreground. */ final void switchUserLocked(int userId) { if (mCurrentUser == userId) { return; } mCurrentUser = userId; // Move userId's tasks to the top. int index = mTaskHistory.size(); for (int i = 0; i < index; ) { final TaskRecord task = mTaskHistory.get(i); // NOTE: If {@link TaskRecord#topRunningActivityLocked} return is not null then it is // okay to show the activity when locked. if (mStackSupervisor.isCurrentProfileLocked(task.userId) || task.topRunningActivityLocked() != null) { if (DEBUG_TASKS) Slog.d(TAG_TASKS, "switchUserLocked: stack=" + getStackId() + " moving " + task + " to top"); mTaskHistory.remove(i); mTaskHistory.add(task); --index; // Use same value for i. } else { ++i; } } if (VALIDATE_TOKENS) { validateAppTokensLocked(); } } void minimalResumeActivityLocked(ActivityRecord r) { r.state = ActivityState.RESUMED; if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + r + " (starting new instance)" + " callers=" + Debug.getCallers(5)); mResumedActivity = r; r.task.touchActiveTime(); mRecentTasks.addLocked(r.task); completeResumeLocked(r); mStackSupervisor.checkReadyForSleepLocked(); setLaunchTime(r); if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "Launch completed; removing icicle of " + r.icicle); } void addRecentActivityLocked(ActivityRecord r) { if (r != null) { mRecentTasks.addLocked(r.task); r.task.touchActiveTime(); } } private void startLaunchTraces(String packageName) { if (mFullyDrawnStartTime != 0) { Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); } Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching: " + packageName, 0); Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); } private void stopFullyDrawnTraceIfNeeded() { if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); mFullyDrawnStartTime = 0; } } void setLaunchTime(ActivityRecord r) { if (r.displayStartTime == 0) { r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); if (mLaunchStartTime == 0) { startLaunchTraces(r.packageName); mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; } } else if (mLaunchStartTime == 0) { startLaunchTraces(r.packageName); mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); } } void clearLaunchTime(ActivityRecord r) { // Make sure that there is no activity waiting for this to launch. if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { r.displayStartTime = r.fullyDrawnStartTime = 0; } else { mStackSupervisor.removeTimeoutsForActivityLocked(r); mStackSupervisor.scheduleIdleTimeoutLocked(r); } } void awakeFromSleepingLocked() { // Ensure activities are no longer sleeping. for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { activities.get(activityNdx).setSleeping(false); } } if (mPausingActivity != null) { Slog.d(TAG, "awakeFromSleepingLocked: previously pausing activity didn't pause"); activityPausedLocked(mPausingActivity.appToken, true); } } void updateActivityApplicationInfoLocked(ApplicationInfo aInfo) { final String packageName = aInfo.packageName; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final List activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { if (packageName.equals(activities.get(activityNdx).packageName)) { activities.get(activityNdx).info.applicationInfo = aInfo; } } } } /** * @return true if something must be done before going to sleep. */ boolean checkReadyForSleepLocked() { if (mResumedActivity != null) { // Still have something resumed; can't sleep until it is paused. if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep needs to pause " + mResumedActivity); if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, "Sleep => pause with userLeaving=false"); startPausingLocked(false, true, false, false); return true; } if (mPausingActivity != null) { // Still waiting for something to pause; can't sleep yet. if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep still waiting to pause " + mPausingActivity); return true; } if (hasVisibleBehindActivity()) { // Stop visible behind activity before going to sleep. final ActivityRecord r = getVisibleBehindActivity(); mStackSupervisor.mStoppingActivities.add(r); if (DEBUG_STATES) Slog.v(TAG_STATES, "Sleep still waiting to stop visible behind " + r); return true; } return false; } void goToSleep() { ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); // Make sure any paused or stopped but visible activities are now sleeping. // This ensures that the activity's onStop() is called. for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED || r.state == ActivityState.PAUSED || r.state == ActivityState.PAUSING) { r.setSleeping(true); } } } } public final Bitmap screenshotActivitiesLocked(ActivityRecord who) { if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "screenshotActivitiesLocked: " + who); if (who.noDisplay) { if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tNo display"); return null; } if (isHomeStack()) { // This is an optimization -- since we never show Home or Recents within Recents itself, // we can just go ahead and skip taking the screenshot if this is the home stack. if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tHome stack"); return null; } int w = mService.mThumbnailWidth; int h = mService.mThumbnailHeight; float scale = 1f; if (w > 0) { if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tTaking screenshot"); // When this flag is set, we currently take the fullscreen screenshot of the activity // but scaled to half the size. This gives us a "good-enough" fullscreen thumbnail to // use within SystemUI while keeping memory usage low. if (ActivityManagerService.TAKE_FULLSCREEN_SCREENSHOTS) { w = h = -1; scale = mService.mFullscreenThumbnailScale; } return mWindowManager.screenshotApplications(who.appToken, Display.DEFAULT_DISPLAY, w, h, scale); } Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); return null; } /** * Start pausing the currently resumed activity. It is an error to call this if there * is already an activity being paused or there is no resumed activity. * * @param userLeaving True if this should result in an onUserLeaving to the current activity. * @param uiSleeping True if this is happening with the user interface going to sleep (the * screen turning off). * @param resuming True if this is being called as part of resuming the top activity, so * we shouldn't try to instigate a resume here. * @param dontWait True if the caller does not want to wait for the pause to complete. If * set to true, we will immediately complete the pause here before returning. * @return Returns true if an activity now is in the PAUSING state, and we are waiting for * it to tell us when it is done. */ final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming, boolean dontWait) { if (mPausingActivity != null) { Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity + " state=" + mPausingActivity.state); if (!mService.isSleepingLocked()) { // Avoid recursion among check for sleep and complete pause during sleeping. // Because activity will be paused immediately after resume, just let pause // be completed by the order of activity paused from clients. completePauseLocked(false); } } ActivityRecord prev = mResumedActivity; if (prev == null) { if (!resuming) { Slog.wtf(TAG, "Trying to pause when nothing is resumed"); mStackSupervisor.resumeFocusedStackTopActivityLocked(); } return false; } if (mActivityContainer.mParentActivity == null) { // Top level stack, not a child. Look for child stacks. mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait); } if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSING: " + prev); else if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Start pausing: " + prev); mResumedActivity = null; mPausingActivity = prev; mLastPausedActivity = prev; mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; prev.state = ActivityState.PAUSING; prev.task.touchActiveTime(); clearLaunchTime(prev); final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) { prev.mUpdateTaskThumbnailWhenHidden = true; } stopFullyDrawnTraceIfNeeded(); mService.updateCpuStats(); if (prev.app != null && prev.app.thread != null) { if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueueing pending pause: " + prev); try { EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, prev.userId, System.identityHashCode(prev), prev.shortComponentName); mService.updateUsageStats(prev, false); prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, userLeaving, prev.configChangeFlags, dontWait); } catch (Exception e) { // Ignore exception, if process died other code will cleanup. Slog.w(TAG, "Exception thrown during pause", e); mPausingActivity = null; mLastPausedActivity = null; mLastNoHistoryActivity = null; } } else { mPausingActivity = null; mLastPausedActivity = null; mLastNoHistoryActivity = null; } // If we are not going to sleep, we want to ensure the device is // awake until the next activity is started. if (!uiSleeping && !mService.isSleepingOrShuttingDownLocked()) { mStackSupervisor.acquireLaunchWakelock(); } if (mPausingActivity != null) { // Have the window manager pause its key dispatching until the new // activity has started. If we're pausing the activity just because // the screen is being turned off and the UI is sleeping, don't interrupt // key dispatch; the same activity will pick it up again on wakeup. if (!uiSleeping) { prev.pauseKeyDispatchingLocked(); } else if (DEBUG_PAUSE) { Slog.v(TAG_PAUSE, "Key dispatch not paused for screen off"); } if (dontWait) { // If the caller said they don't want to wait for the pause, then complete // the pause now. completePauseLocked(false); return false; } else { // Schedule a pause timeout in case the app doesn't respond. // We don't give it much time because this directly impacts the // responsiveness seen by the user. Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); msg.obj = prev; prev.pauseTime = SystemClock.uptimeMillis(); mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Waiting for pause to complete..."); return true; } } else { // This activity failed to schedule the // pause, so just treat it as being paused now. if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Activity not running, resuming next."); if (!resuming) { mStackSupervisor.resumeFocusedStackTopActivityLocked(); } return false; } } final void activityPausedLocked(IBinder token, boolean timeout) { if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Activity paused: token=" + token + ", timeout=" + timeout); final ActivityRecord r = isInStackLocked(token); if (r != null) { mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); if (mPausingActivity == r) { if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSED: " + r + (timeout ? " (due to timeout)" : " (pause complete)")); completePauseLocked(true); return; } else { EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, r.userId, System.identityHashCode(r), r.shortComponentName, mPausingActivity != null ? mPausingActivity.shortComponentName : "(none)"); if (r.state == ActivityState.PAUSING) { r.state = ActivityState.PAUSED; if (r.finishing) { if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of failed to pause activity: " + r); finishCurrentActivityLocked(r, FINISH_AFTER_VISIBLE, false); } } } } mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); } final void activityResumedLocked(IBinder token) { final ActivityRecord r = ActivityRecord.forTokenLocked(token); if (DEBUG_SAVED_STATE) Slog.i(TAG_STATES, "Resumed activity; dropping state of: " + r); r.icicle = null; r.haveState = false; } final void activityStoppedLocked(ActivityRecord r, Bundle icicle, PersistableBundle persistentState, CharSequence description) { if (r.state != ActivityState.STOPPING) { Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); mHandler.removeMessages(STOP_TIMEOUT_MSG, r); return; } if (persistentState != null) { r.persistentState = persistentState; mService.notifyTaskPersisterLocked(r.task, false); } if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "Saving icicle of " + r + ": " + icicle); if (icicle != null) { // If icicle is null, this is happening due to a timeout, so we // haven't really saved the state. r.icicle = icicle; r.haveState = true; r.launchCount = 0; r.updateThumbnailLocked(null, description); } if (!r.stopped) { if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPED: " + r + " (stop complete)"); mHandler.removeMessages(STOP_TIMEOUT_MSG, r); r.stopped = true; r.state = ActivityState.STOPPED; mWindowManager.notifyAppStopped(r.appToken, true); if (getVisibleBehindActivity() == r) { mStackSupervisor.requestVisibleBehindLocked(r, false); } if (r.finishing) { r.clearOptionsLocked(); } else { if (r.deferRelaunchUntilPaused) { destroyActivityLocked(r, true, "stop-config"); mStackSupervisor.resumeFocusedStackTopActivityLocked(); } else { mStackSupervisor.updatePreviousProcessLocked(r); } } } } private void completePauseLocked(boolean resumeNext) { ActivityRecord prev = mPausingActivity; if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Complete pause: " + prev); if (prev != null) { final boolean wasStopping = prev.state == ActivityState.STOPPING; prev.state = ActivityState.PAUSED; if (prev.finishing) { if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Executing finish of activity: " + prev); prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); } else if (prev.app != null) { if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueue pending stop if needed: " + prev + " wasStopping=" + wasStopping + " visible=" + prev.visible); if (mStackSupervisor.mWaitingVisibleActivities.remove(prev)) { if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Complete pause, no longer waiting: " + prev); } if (prev.deferRelaunchUntilPaused) { // Complete the deferred relaunch that was waiting for pause to complete. if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Re-launching after pause: " + prev); relaunchActivityLocked(prev, prev.configChangeFlags, false, prev.preserveWindowOnDeferredRelaunch); } else if (wasStopping) { // We are also stopping, the stop request must have gone soon after the pause. // We can't clobber it, because the stop confirmation will not be handled. // We don't need to schedule another stop, we only need to let it happen. prev.state = ActivityState.STOPPING; } else if ((!prev.visible && !hasVisibleBehindActivity()) || mService.isSleepingOrShuttingDownLocked()) { // If we were visible then resumeTopActivities will release resources before // stopping. addToStopping(prev, true /* immediate */); } } else { if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "App died during pause, not stopping: " + prev); prev = null; } // It is possible the activity was freezing the screen before it was paused. // In that case go ahead and remove the freeze this activity has on the screen // since it is no longer visible. prev.stopFreezingScreenLocked(true /*force*/); mPausingActivity = null; } if (resumeNext) { final ActivityStack topStack = mStackSupervisor.getFocusedStack(); if (!mService.isSleepingOrShuttingDownLocked()) { mStackSupervisor.resumeFocusedStackTopActivityLocked(topStack, prev, null); } else { mStackSupervisor.checkReadyForSleepLocked(); ActivityRecord top = topStack.topRunningActivityLocked(); if (top == null || (prev != null && top != prev)) { // If there are no more activities available to run, do resume anyway to start // something. Also if the top activity on the stack is not the just paused // activity, we need to go ahead and resume it to ensure we complete an // in-flight app switch. mStackSupervisor.resumeFocusedStackTopActivityLocked(); } } } if (prev != null) { prev.resumeKeyDispatchingLocked(); if (prev.app != null && prev.cpuTimeAtResume > 0 && mService.mBatteryStatsService.isOnBattery()) { long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) - prev.cpuTimeAtResume; if (diff > 0) { BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); synchronized (bsi) { BatteryStatsImpl.Uid.Proc ps = bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, prev.info.packageName); if (ps != null) { ps.addForegroundTimeLocked(diff); } } } } prev.cpuTimeAtResume = 0; // reset it } // Notify when the task stack has changed, but only if visibilities changed (not just focus) if (mStackSupervisor.mAppVisibilitiesChangedSinceLastPause) { mService.notifyTaskStackChangedLocked(); mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = false; } mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); } private void addToStopping(ActivityRecord r, boolean immediate) { if (!mStackSupervisor.mStoppingActivities.contains(r)) { mStackSupervisor.mStoppingActivities.add(r); } // If we already have a few activities waiting to stop, then give up // on things going idle and start clearing them out. Or if r is the // last of activity of the last task the stack will be empty and must // be cleared immediately. boolean forceIdle = mStackSupervisor.mStoppingActivities.size() > MAX_STOPPING_TO_FORCE || (r.frontOfTask && mTaskHistory.size() <= 1); if (immediate || forceIdle) { if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Scheduling idle now: forceIdle=" + forceIdle + "immediate=" + immediate); mStackSupervisor.scheduleIdleLocked(); } else { mStackSupervisor.checkReadyForSleepLocked(); } } /** * Once we know that we have asked an application to put an activity in * the resumed state (either by launching it or explicitly telling it), * this function updates the rest of our state to match that fact. */ private void completeResumeLocked(ActivityRecord next) { next.visible = true; next.idle = false; next.results = null; next.newIntents = null; next.stopped = false; if (next.isHomeActivity()) { ProcessRecord app = next.task.mActivities.get(0).app; if (app != null && app != mService.mHomeProcess) { mService.mHomeProcess = app; } } if (next.nowVisible) { // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. mStackSupervisor.reportActivityVisibleLocked(next); mStackSupervisor.notifyActivityDrawnForKeyguard(); } // schedule an idle timeout in case the app doesn't do it for us. mStackSupervisor.scheduleIdleTimeoutLocked(next); mStackSupervisor.reportResumedActivityLocked(next); next.resumeKeyDispatchingLocked(); mNoAnimActivities.clear(); // Mark the point when the activity is resuming // TODO: To be more accurate, the mark should be before the onCreate, // not after the onResume. But for subsequent starts, onResume is fine. if (next.app != null) { next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); } else { next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process } next.returningOptions = null; if (getVisibleBehindActivity() == next) { // When resuming an activity, require it to call requestVisibleBehind() again. setVisibleBehindActivity(null); } } private void setVisible(ActivityRecord r, boolean visible) { r.visible = visible; if (!visible && r.mUpdateTaskThumbnailWhenHidden) { r.updateThumbnailLocked(r.task.stack.screenshotActivitiesLocked(r), null); r.mUpdateTaskThumbnailWhenHidden = false; } mWindowManager.setAppVisibility(r.appToken, visible); final ArrayList containers = r.mChildContainers; for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { ActivityContainer container = containers.get(containerNdx); container.setVisible(visible); } mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = true; } // Find the first visible activity above the passed activity and if it is translucent return it // otherwise return null; ActivityRecord findNextTranslucentActivity(ActivityRecord r) { TaskRecord task = r.task; if (task == null) { return null; } ActivityStack stack = task.stack; if (stack == null) { return null; } int stackNdx = mStacks.indexOf(stack); ArrayList tasks = stack.mTaskHistory; int taskNdx = tasks.indexOf(task); ArrayList activities = task.mActivities; int activityNdx = activities.indexOf(r) + 1; final int numStacks = mStacks.size(); while (stackNdx < numStacks) { final ActivityStack historyStack = mStacks.get(stackNdx); tasks = historyStack.mTaskHistory; final int numTasks = tasks.size(); while (taskNdx < numTasks) { final TaskRecord currentTask = tasks.get(taskNdx); activities = currentTask.mActivities; final int numActivities = activities.size(); while (activityNdx < numActivities) { final ActivityRecord activity = activities.get(activityNdx); if (!activity.finishing) { return historyStack.mFullscreen && currentTask.mFullscreen && activity.fullscreen ? null : activity; } ++activityNdx; } activityNdx = 0; ++taskNdx; } taskNdx = 0; ++stackNdx; } return null; } ActivityStack getNextFocusableStackLocked() { ArrayList stacks = mStacks; final ActivityRecord parent = mActivityContainer.mParentActivity; if (parent != null) { stacks = parent.task.stack.mStacks; } if (stacks != null) { for (int i = stacks.size() - 1; i >= 0; --i) { ActivityStack stack = stacks.get(i); if (stack != this && stack.isFocusable() && stack.getStackVisibilityLocked(null) != STACK_INVISIBLE) { return stack; } } } return null; } /** Returns true if the stack contains a fullscreen task. */ private boolean hasFullscreenTask() { for (int i = mTaskHistory.size() - 1; i >= 0; --i) { final TaskRecord task = mTaskHistory.get(i); if (task.mFullscreen) { return true; } } return false; } /** * Returns true if the stack is translucent and can have other contents visible behind it if * needed. A stack is considered translucent if it don't contain a visible or * starting (about to be visible) activity that is fullscreen (opaque). * @param starting The currently starting activity or null if there is none. * @param stackBehindId The id of the stack directly behind this one. */ private boolean isStackTranslucent(ActivityRecord starting, int stackBehindId) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); final ArrayList activities = task.mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if (r.finishing) { // We don't factor in finishing activities when determining translucency since // they will be gone soon. continue; } if (!r.visible && r != starting) { // Also ignore invisible activities that are not the currently starting // activity (about to be visible). continue; } if (r.fullscreen) { // Stack isn't translucent if it has at least one fullscreen activity // that is visible. return false; } if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack() && stackBehindId != HOME_STACK_ID) { // Stack isn't translucent if it's top activity should have the home stack // behind it and the stack currently behind it isn't the home stack. return false; } } } return true; } /** * Returns stack's visibility: {@link #STACK_INVISIBLE}, {@link #STACK_VISIBLE} or * {@link #STACK_VISIBLE_ACTIVITY_BEHIND}. * @param starting The currently starting activity or null if there is none. */ int getStackVisibilityLocked(ActivityRecord starting) { if (!isAttached()) { return STACK_INVISIBLE; } if (mStackSupervisor.isFrontStack(this) || mStackSupervisor.isFocusedStack(this)) { return STACK_VISIBLE; } final int stackIndex = mStacks.indexOf(this); if (stackIndex == mStacks.size() - 1) { Slog.wtf(TAG, "Stack=" + this + " isn't front stack but is at the top of the stack list"); return STACK_INVISIBLE; } final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN; if (isLockscreenShown && !StackId.isAllowedOverLockscreen(mStackId)) { return STACK_INVISIBLE; } final ActivityStack focusedStack = mStackSupervisor.getFocusedStack(); final int focusedStackId = focusedStack.mStackId; if (mStackId == FULLSCREEN_WORKSPACE_STACK_ID && hasVisibleBehindActivity() && focusedStackId == HOME_STACK_ID && !focusedStack.topActivity().fullscreen) { // The fullscreen stack should be visible if it has a visible behind activity behind // the home stack that is translucent. return STACK_VISIBLE_ACTIVITY_BEHIND; } if (mStackId == DOCKED_STACK_ID) { // Docked stack is always visible, except in the case where the top running activity // task in the focus stack doesn't support any form of resizing but we show it for the // home task even though it's not resizable. final ActivityRecord r = focusedStack.topRunningActivityLocked(); final TaskRecord task = r != null ? r.task : null; return task == null || task.canGoInDockedStack() || task.isHomeTask() ? STACK_VISIBLE : STACK_INVISIBLE; } // Find the first stack behind focused stack that actually got something visible. int stackBehindFocusedIndex = mStacks.indexOf(focusedStack) - 1; while (stackBehindFocusedIndex >= 0 && mStacks.get(stackBehindFocusedIndex).topRunningActivityLocked() == null) { stackBehindFocusedIndex--; } if ((focusedStackId == DOCKED_STACK_ID || focusedStackId == PINNED_STACK_ID) && stackIndex == stackBehindFocusedIndex) { // Stacks directly behind the docked or pinned stack are always visible. return STACK_VISIBLE; } final int stackBehindFocusedId = (stackBehindFocusedIndex >= 0) ? mStacks.get(stackBehindFocusedIndex).mStackId : INVALID_STACK_ID; if (focusedStackId == FULLSCREEN_WORKSPACE_STACK_ID && focusedStack.isStackTranslucent(starting, stackBehindFocusedId)) { // Stacks behind the fullscreen stack with a translucent activity are always // visible so they can act as a backdrop to the translucent activity. // For example, dialog activities if (stackIndex == stackBehindFocusedIndex) { return STACK_VISIBLE; } if (stackBehindFocusedIndex >= 0) { if ((stackBehindFocusedId == DOCKED_STACK_ID || stackBehindFocusedId == PINNED_STACK_ID) && stackIndex == (stackBehindFocusedIndex - 1)) { // The stack behind the docked or pinned stack is also visible so we can have a // complete backdrop to the translucent activity when the docked stack is up. return STACK_VISIBLE; } } } if (StackId.isStaticStack(mStackId)) { // Visibility of any static stack should have been determined by the conditions above. return STACK_INVISIBLE; } for (int i = stackIndex + 1; i < mStacks.size(); i++) { final ActivityStack stack = mStacks.get(i); if (!stack.mFullscreen && !stack.hasFullscreenTask()) { continue; } if (!StackId.isDynamicStacksVisibleBehindAllowed(stack.mStackId)) { // These stacks can't have any dynamic stacks visible behind them. return STACK_INVISIBLE; } if (!stack.isStackTranslucent(starting, INVALID_STACK_ID)) { return STACK_INVISIBLE; } } return STACK_VISIBLE; } final int rankTaskLayers(int baseLayer) { int layer = 0; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); ActivityRecord r = task.topRunningActivityLocked(); if (r == null || r.finishing || !r.visible) { task.mLayerRank = -1; } else { task.mLayerRank = baseLayer + layer++; } } return layer; } /** * Make sure that all activities that need to be visible (that is, they * currently can be seen by the user) actually are. */ final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges, boolean preserveWindows) { ActivityRecord top = topRunningActivityLocked(); if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "ensureActivitiesVisible behind " + top + " configChanges=0x" + Integer.toHexString(configChanges)); if (top != null) { checkTranslucentActivityWaiting(top); } // If the top activity is not fullscreen, then we need to // make sure any activities under it are now visible. boolean aboveTop = top != null; final int stackVisibility = getStackVisibilityLocked(starting); final boolean stackInvisible = stackVisibility != STACK_VISIBLE; final boolean stackVisibleBehind = stackVisibility == STACK_VISIBLE_ACTIVITY_BEHIND; boolean behindFullscreenActivity = stackInvisible; boolean resumeNextActivity = mStackSupervisor.isFocusedStack(this) && (isInStackLocked(starting) == null); boolean behindTranslucentActivity = false; final ActivityRecord visibleBehind = getVisibleBehindActivity(); for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); final ArrayList activities = task.mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if (r.finishing) { // Normally the screenshot will be taken in makeInvisible(). When an activity // is finishing, we no longer change its visibility, but we still need to take // the screenshots if startPausingLocked decided it should be taken. if (r.mUpdateTaskThumbnailWhenHidden) { r.updateThumbnailLocked(screenshotActivitiesLocked(r), null); r.mUpdateTaskThumbnailWhenHidden = false; } continue; } final boolean isTop = r == top; if (aboveTop && !isTop) { continue; } aboveTop = false; if (shouldBeVisible(r, behindTranslucentActivity, stackVisibleBehind, visibleBehind, behindFullscreenActivity)) { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make visible? " + r + " finishing=" + r.finishing + " state=" + r.state); // First: if this is not the current activity being started, make // sure it matches the current configuration. if (r != starting) { ensureActivityConfigurationLocked(r, 0, preserveWindows); } if (r.app == null || r.app.thread == null) { if (makeVisibleAndRestartIfNeeded(starting, configChanges, isTop, resumeNextActivity, r)) { if (activityNdx >= activities.size()) { // Record may be removed if its process needs to restart. activityNdx = activities.size() - 1; } else { resumeNextActivity = false; } } } else if (r.visible) { // If this activity is already visible, then there is nothing to do here. if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Skipping: already visible at " + r); if (handleAlreadyVisible(r)) { resumeNextActivity = false; } } else { makeVisibleIfNeeded(starting, r); } // Aggregate current change flags. configChanges |= r.configChangeFlags; behindFullscreenActivity = updateBehindFullscreen(stackInvisible, behindFullscreenActivity, task, r); if (behindFullscreenActivity && !r.fullscreen) { behindTranslucentActivity = true; } } else { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make invisible? " + r + " finishing=" + r.finishing + " state=" + r.state + " stackInvisible=" + stackInvisible + " behindFullscreenActivity=" + behindFullscreenActivity + " mLaunchTaskBehind=" + r.mLaunchTaskBehind); makeInvisible(r, visibleBehind); } } if (mStackId == FREEFORM_WORKSPACE_STACK_ID) { // The visibility of tasks and the activities they contain in freeform stack are // determined individually unlike other stacks where the visibility or fullscreen // status of an activity in a previous task affects other. behindFullscreenActivity = stackVisibility == STACK_INVISIBLE; } else if (mStackId == HOME_STACK_ID) { if (task.isHomeTask()) { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Home task: at " + task + " stackInvisible=" + stackInvisible + " behindFullscreenActivity=" + behindFullscreenActivity); // No other task in the home stack should be visible behind the home activity. // Home activities is usually a translucent activity with the wallpaper behind // them. However, when they don't have the wallpaper behind them, we want to // show activities in the next application stack behind them vs. another // task in the home stack like recents. behindFullscreenActivity = true; } else if (task.isRecentsTask() && task.getTaskToReturnTo() == APPLICATION_ACTIVITY_TYPE) { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Recents task returning to app: at " + task + " stackInvisible=" + stackInvisible + " behindFullscreenActivity=" + behindFullscreenActivity); // We don't want any other tasks in the home stack visible if the recents // activity is going to be returning to an application activity type. // We do this to preserve the visible order the user used to get into the // recents activity. The recents activity is normally translucent and if it // doesn't have the wallpaper behind it the next activity in the home stack // shouldn't be visible when the home stack is brought to the front to display // the recents activity from an app. behindFullscreenActivity = true; } } } if (mTranslucentActivityWaiting != null && mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { // Nothing is getting drawn or everything was already visible, don't wait for timeout. notifyActivityDrawnLocked(null); } } /** Return true if the input activity should be made visible */ private boolean shouldBeVisible(ActivityRecord r, boolean behindTranslucentActivity, boolean stackVisibleBehind, ActivityRecord visibleBehind, boolean behindFullscreenActivity) { if (!okToShowLocked(r)) { return false; } // mLaunchingBehind: Activities launching behind are at the back of the task stack // but must be drawn initially for the animation as though they were visible. final boolean activityVisibleBehind = (behindTranslucentActivity || stackVisibleBehind) && visibleBehind == r; boolean isVisible = !behindFullscreenActivity || r.mLaunchTaskBehind || activityVisibleBehind; if (mService.mSupportsLeanbackOnly && isVisible && r.isRecentsActivity()) { // On devices that support leanback only (Android TV), Recents activity can only be // visible if the home stack is the focused stack or we are in split-screen mode. isVisible = mStackSupervisor.getStack(DOCKED_STACK_ID) != null || mStackSupervisor.isFocusedStack(this); } return isVisible; } private void checkTranslucentActivityWaiting(ActivityRecord top) { if (mTranslucentActivityWaiting != top) { mUndrawnActivitiesBelowTopTranslucent.clear(); if (mTranslucentActivityWaiting != null) { // Call the callback with a timeout indication. notifyActivityDrawnLocked(null); mTranslucentActivityWaiting = null; } mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); } } private boolean makeVisibleAndRestartIfNeeded(ActivityRecord starting, int configChanges, boolean isTop, boolean andResume, ActivityRecord r) { // We need to make sure the app is running if it's the top, or it is just made visible from // invisible. If the app is already visible, it must have died while it was visible. In this // case, we'll show the dead window but will not restart the app. Otherwise we could end up // thrashing. if (isTop || !r.visible) { // This activity needs to be visible, but isn't even running... // get it started and resume if no other stack in this stack is resumed. if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Start and freeze screen for " + r); if (r != starting) { r.startFreezingScreenLocked(r.app, configChanges); } if (!r.visible || r.mLaunchTaskBehind) { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Starting and making visible: " + r); setVisible(r, true); } if (r != starting) { mStackSupervisor.startSpecificActivityLocked(r, andResume, false); return true; } } return false; } private void makeInvisible(ActivityRecord r, ActivityRecord visibleBehind) { if (!r.visible) { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Already invisible: " + r); return; } // Now for any activities that aren't visible to the user, make sure they no longer are // keeping the screen frozen. if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Making invisible: " + r + " " + r.state); try { setVisible(r, false); switch (r.state) { case STOPPING: case STOPPED: if (r.app != null && r.app.thread != null) { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Scheduling invisibility: " + r); r.app.thread.scheduleWindowVisibility(r.appToken, false); } break; case INITIALIZING: case RESUMED: case PAUSING: case PAUSED: // This case created for transitioning activities from // translucent to opaque {@link Activity#convertToOpaque}. if (visibleBehind == r) { releaseBackgroundResources(r); } else { addToStopping(r, true /* immediate */); } break; default: break; } } catch (Exception e) { // Just skip on any failure; we'll make it visible when it next restarts. Slog.w(TAG, "Exception thrown making hidden: " + r.intent.getComponent(), e); } } private boolean updateBehindFullscreen(boolean stackInvisible, boolean behindFullscreenActivity, TaskRecord task, ActivityRecord r) { if (r.fullscreen) { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Fullscreen: at " + r + " stackInvisible=" + stackInvisible + " behindFullscreenActivity=" + behindFullscreenActivity); // At this point, nothing else needs to be shown in this task. behindFullscreenActivity = true; } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Showing home: at " + r + " stackInvisible=" + stackInvisible + " behindFullscreenActivity=" + behindFullscreenActivity); behindFullscreenActivity = true; } return behindFullscreenActivity; } private void makeVisibleIfNeeded(ActivityRecord starting, ActivityRecord r) { // This activity is not currently visible, but is running. Tell it to become visible. if (r.state == ActivityState.RESUMED || r == starting) { if (DEBUG_VISIBILITY) Slog.d(TAG_VISIBILITY, "Not making visible, r=" + r + " state=" + r.state + " starting=" + starting); return; } // If this activity is paused, tell it to now show its window. if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Making visible and scheduling visibility: " + r); try { if (mTranslucentActivityWaiting != null) { r.updateOptionsLocked(r.returningOptions); mUndrawnActivitiesBelowTopTranslucent.add(r); } setVisible(r, true); r.sleeping = false; r.app.pendingUiClean = true; r.app.thread.scheduleWindowVisibility(r.appToken, true); // The activity may be waiting for stop, but that is no longer // appropriate for it. mStackSupervisor.mStoppingActivities.remove(r); mStackSupervisor.mGoingToSleepActivities.remove(r); } 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); } handleAlreadyVisible(r); } private boolean handleAlreadyVisible(ActivityRecord r) { r.stopFreezingScreenLocked(false); try { if (r.returningOptions != null) { r.app.thread.scheduleOnNewActivityOptions(r.appToken, r.returningOptions); } } catch(RemoteException e) { } return r.state == ActivityState.RESUMED; } void convertActivityToTranslucent(ActivityRecord r) { mTranslucentActivityWaiting = r; mUndrawnActivitiesBelowTopTranslucent.clear(); mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); } void clearOtherAppTimeTrackers(AppTimeTracker except) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); final ArrayList activities = task.mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if ( r.appTimeTracker != except) { r.appTimeTracker = null; } } } } /** * Called as activities below the top translucent activity are redrawn. When the last one is * redrawn notify the top activity by calling * {@link Activity#onTranslucentConversionComplete}. * * @param r The most recent background activity to be drawn. Or, if r is null then a timeout * occurred and the activity will be notified immediately. */ void notifyActivityDrawnLocked(ActivityRecord r) { mActivityContainer.setDrawn(); if ((r == null) || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { // The last undrawn activity below the top has just been drawn. If there is an // opaque activity at the top, notify it that it can become translucent safely now. final ActivityRecord waitingActivity = mTranslucentActivityWaiting; mTranslucentActivityWaiting = null; mUndrawnActivitiesBelowTopTranslucent.clear(); mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); if (waitingActivity != null) { mWindowManager.setWindowOpaque(waitingActivity.appToken, false); if (waitingActivity.app != null && waitingActivity.app.thread != null) { try { waitingActivity.app.thread.scheduleTranslucentConversionComplete( waitingActivity.appToken, r != null); } catch (RemoteException e) { } } } } } /** If any activities below the top running one are in the INITIALIZING state and they have a * starting window displayed then remove that starting window. It is possible that the activity * in this state will never resumed in which case that starting window will be orphaned. */ void cancelInitializingActivities() { final ActivityRecord topActivity = topRunningActivityLocked(); boolean aboveTop = true; // We don't want to clear starting window for activities that aren't behind fullscreen // activities as we need to display their starting window until they are done initializing. boolean behindFullscreenActivity = false; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if (aboveTop) { if (r == topActivity) { aboveTop = false; } behindFullscreenActivity |= r.fullscreen; continue; } if (r.state == ActivityState.INITIALIZING && r.mStartingWindowState == STARTING_WINDOW_SHOWN && behindFullscreenActivity) { if (DEBUG_VISIBILITY) Slog.w(TAG_VISIBILITY, "Found orphaned starting window " + r); r.mStartingWindowState = STARTING_WINDOW_REMOVED; mWindowManager.removeAppStartingWindow(r.appToken); } behindFullscreenActivity |= r.fullscreen; } } } /** * 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. * @param options Activity options. * * @return Returns true if something is being resumed, or false if * nothing happened. * * NOTE: It is not safe to call this method directly as it can cause an activity in a * non-focused stack to be resumed. * Use {@link ActivityStackSupervisor#resumeFocusedStackTopActivityLocked} to resume the * right activity for the current system state. */ boolean resumeTopActivityUncheckedLocked(ActivityRecord prev, ActivityOptions options) { if (mStackSupervisor.inResumeTopActivity) { // Don't even start recursing. return false; } boolean result = false; try { // Protect against recursion. mStackSupervisor.inResumeTopActivity = true; if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) { mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN; mService.updateSleepIfNeededLocked(); } result = resumeTopActivityInnerLocked(prev, options); } finally { mStackSupervisor.inResumeTopActivity = false; } return result; } private boolean resumeTopActivityInnerLocked(ActivityRecord prev, ActivityOptions options) { if (DEBUG_LOCKSCREEN) mService.logLockScreen(""); if (!mService.mBooting && !mService.mBooted) { // Not ready yet! return false; } ActivityRecord parent = mActivityContainer.mParentActivity; if ((parent != null && parent.state != ActivityState.RESUMED) || !mActivityContainer.isAttachedLocked()) { // Do not resume this stack if its parent is not resumed. // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. return false; } mStackSupervisor.cancelInitializingActivities(); // Find the first activity that is not finishing. final ActivityRecord next = topRunningActivityLocked(); // Remember how we'll process this pause/resume situation, and ensure // that the state is reset however we wind up proceeding. final boolean userLeaving = mStackSupervisor.mUserLeaving; mStackSupervisor.mUserLeaving = false; final TaskRecord prevTask = prev != null ? prev.task : null; if (next == null) { // There are no more activities! final String reason = "noMoreActivities"; final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); if (!mFullscreen && adjustFocusToNextFocusableStackLocked(returnTaskType, reason)) { // Try to move focus to the next visible stack with a running activity if this // stack is not covering the entire screen. return mStackSupervisor.resumeFocusedStackTopActivityLocked( mStackSupervisor.getFocusedStack(), prev, null); } // Let's just start up the Launcher... ActivityOptions.abort(options); if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: No more activities go home"); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); // Only resume home if on home display return isOnHomeDisplay() && mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, reason); } next.delayedResume = false; // If the top activity is the resumed one, nothing to do. if (mResumedActivity == next && next.state == ActivityState.RESUMED && mStackSupervisor.allResumedActivitiesComplete()) { // Make sure we have executed any pending transitions, since there // should be nothing left to do at this point. mWindowManager.executeAppTransition(); mNoAnimActivities.clear(); ActivityOptions.abort(options); if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Top activity resumed " + next); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return false; } final TaskRecord nextTask = next.task; if (prevTask != null && prevTask.stack == this && prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); if (prevTask == nextTask) { prevTask.setFrontOfTask(); } else if (prevTask != topTask()) { // This task is going away but it was supposed to return to the home stack. // Now the task above it has to return to the home task instead. final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); } else if (!isOnHomeDisplay()) { return false; } else if (!isHomeStack()){ if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Launching home next"); final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); return isOnHomeDisplay() && mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, "prevFinished"); } } // 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.isSleepingOrShuttingDownLocked() && mLastPausedActivity == next && mStackSupervisor.allPausedActivitiesComplete()) { // Make sure we have executed any pending transitions, since there // should be nothing left to do at this point. mWindowManager.executeAppTransition(); mNoAnimActivities.clear(); ActivityOptions.abort(options); if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Going to sleep and all paused"); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return false; } // Make sure that the user who owns this activity is started. If not, // we will just leave it as is because someone should be bringing // another user's activities to the top of the stack. if (!mService.mUserController.hasStartedUserState(next.userId)) { Slog.w(TAG, "Skipping resume of top activity " + next + ": user " + next.userId + " is stopped"); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return false; } // The activity may be waiting for stop, but that is no longer // appropriate for it. mStackSupervisor.mStoppingActivities.remove(next); mStackSupervisor.mGoingToSleepActivities.remove(next); next.sleeping = false; mStackSupervisor.mWaitingVisibleActivities.remove(next); if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resuming " + next); // If we are currently pausing an activity, then don't do anything until that is done. if (!mStackSupervisor.allPausedActivitiesComplete()) { if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG_PAUSE, "resumeTopActivityLocked: Skip resume: some activity pausing."); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return false; } mStackSupervisor.setLaunchSource(next.info.applicationInfo.uid); // We need to start pausing the current activity so the top one can be resumed... final boolean dontWaitForPause = (next.info.flags & FLAG_RESUME_WHILE_PAUSING) != 0; boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); if (mResumedActivity != null) { if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Pausing " + mResumedActivity); pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); } if (pausing) { if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG_STATES, "resumeTopActivityLocked: Skip resume: need to start pausing"); // At this point we want to put the upcoming activity's process // at the top of the LRU list, since we know we will be needing it // very soon and it would be a waste to let it get killed if it // happens to be sitting towards the end. if (next.app != null && next.app.thread != null) { mService.updateLruProcessLocked(next.app, true, null); } if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return true; } else if (mResumedActivity == next && next.state == ActivityState.RESUMED && mStackSupervisor.allResumedActivitiesComplete()) { // It is possible for the activity to be resumed when we paused back stacks above if the // next activity doesn't have to wait for pause to complete. // So, nothing else to-do except: // Make sure we have executed any pending transitions, since there // should be nothing left to do at this point. mWindowManager.executeAppTransition(); mNoAnimActivities.clear(); ActivityOptions.abort(options); if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Top activity resumed (dontWaitForPause) " + next); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return true; } // If the most recent activity was noHistory but was only stopped rather // than stopped+finished because the device went to sleep, we need to make // sure to finish it as we're making a new activity topmost. if (mService.isSleepingLocked() && mLastNoHistoryActivity != null && !mLastNoHistoryActivity.finishing) { if (DEBUG_STATES) Slog.d(TAG_STATES, "no-history finish of " + mLastNoHistoryActivity + " on new resume"); requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, null, "resume-no-history", false); mLastNoHistoryActivity = null; } if (prev != null && prev != next) { if (!mStackSupervisor.mWaitingVisibleActivities.contains(prev) && next != null && !next.nowVisible) { mStackSupervisor.mWaitingVisibleActivities.add(prev); if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resuming top, waiting visible to hide: " + prev); } else { // The next activity is already visible, so hide the previous // activity's windows right now so we can show the new one ASAP. // We only do this if the previous is finishing, which should mean // it is on top of the one being resumed so hiding it quickly // is good. Otherwise, we want to do the normal route of allowing // the resumed activity to be shown so we can decide if the // previous should actually be hidden depending on whether the // new one is found to be full-screen or not. if (prev.finishing) { mWindowManager.setAppVisibility(prev.appToken, false); if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Not waiting for visible to hide: " + prev + ", waitingVisible=" + mStackSupervisor.mWaitingVisibleActivities.contains(prev) + ", nowVisible=" + next.nowVisible); } else { if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Previous already visible but still waiting to hide: " + prev + ", waitingVisible=" + mStackSupervisor.mWaitingVisibleActivities.contains(prev) + ", nowVisible=" + next.nowVisible); } } } // Launching this app's activity, make sure the app is no longer // considered stopped. try { AppGlobals.getPackageManager().setPackageStoppedState( next.packageName, false, next.userId); /* TODO: Verify if correct userid */ } catch (RemoteException e1) { } catch (IllegalArgumentException e) { Slog.w(TAG, "Failed trying to unstop package " + next.packageName + ": " + e); } // We are starting up the next activity, so tell the window manager // that the previous one will be hidden soon. This way it can know // to ignore it when computing the desired screen orientation. boolean anim = true; if (prev != null) { if (prev.finishing) { if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare close transition: prev=" + prev); if (mNoAnimActivities.contains(prev)) { anim = false; mWindowManager.prepareAppTransition(TRANSIT_NONE, false); } else { mWindowManager.prepareAppTransition(prev.task == next.task ? TRANSIT_ACTIVITY_CLOSE : TRANSIT_TASK_CLOSE, false); } mWindowManager.setAppVisibility(prev.appToken, false); } else { if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare open transition: prev=" + prev); if (mNoAnimActivities.contains(next)) { anim = false; mWindowManager.prepareAppTransition(TRANSIT_NONE, false); } else { mWindowManager.prepareAppTransition(prev.task == next.task ? TRANSIT_ACTIVITY_OPEN : next.mLaunchTaskBehind ? TRANSIT_TASK_OPEN_BEHIND : TRANSIT_TASK_OPEN, false); } } } else { if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare open transition: no previous"); if (mNoAnimActivities.contains(next)) { anim = false; mWindowManager.prepareAppTransition(TRANSIT_NONE, false); } else { mWindowManager.prepareAppTransition(TRANSIT_ACTIVITY_OPEN, false); } } Bundle resumeAnimOptions = null; if (anim) { ActivityOptions opts = next.getOptionsForTargetActivityLocked(); if (opts != null) { resumeAnimOptions = opts.toBundle(); } next.applyOptionsLocked(); } else { next.clearOptionsLocked(); } ActivityStack lastStack = mStackSupervisor.getLastStack(); if (next.app != null && next.app.thread != null) { if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resume running: " + next + " stopped=" + next.stopped + " visible=" + next.visible); // If the previous activity is translucent, force a visibility update of // the next activity, so that it's added to WM's opening app list, and // transition animation can be set up properly. // For example, pressing Home button with a translucent activity in focus. // Launcher is already visible in this case. If we don't add it to opening // apps, maybeUpdateTransitToWallpaper() will fail to identify this as a // TRANSIT_WALLPAPER_OPEN animation, and run some funny animation. final boolean lastActivityTranslucent = lastStack != null && (!lastStack.mFullscreen || (lastStack.mLastPausedActivity != null && !lastStack.mLastPausedActivity.fullscreen)); // This activity is now becoming visible. if (!next.visible || next.stopped || lastActivityTranslucent) { mWindowManager.setAppVisibility(next.appToken, true); } // schedule launch ticks to collect information about slow apps. next.startLaunchTickingLocked(); ActivityRecord lastResumedActivity = lastStack == null ? null :lastStack.mResumedActivity; ActivityState lastState = next.state; mService.updateCpuStats(); if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + next + " (in existing)"); next.state = ActivityState.RESUMED; mResumedActivity = next; next.task.touchActiveTime(); mRecentTasks.addLocked(next.task); mService.updateLruProcessLocked(next.app, true, null); updateLRUListLocked(next); mService.updateOomAdjLocked(); // Have the window manager re-evaluate the orientation of // the screen based on the new activity order. boolean notUpdated = true; if (mStackSupervisor.isFocusedStack(this)) { Configuration config = mWindowManager.updateOrientationFromAppTokens( mService.mConfiguration, next.mayFreezeScreenLocked(next.app) ? next.appToken : null); if (config != null) { next.frozenBeforeDestroy = true; } notUpdated = !mService.updateConfigurationLocked(config, next, false); } if (notUpdated) { // The configuration update wasn't able to keep the existing // instance of the activity, and instead started a new one. // We should be all done, but let's just make sure our activity // is still at the top and schedule another run if something // weird happened. ActivityRecord nextNext = topRunningActivityLocked(); if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_STATES, "Activity config changed during resume: " + next + ", new next: " + nextNext); if (nextNext != next) { // Do over! mStackSupervisor.scheduleResumeTopActivities(); } if (mStackSupervisor.reportResumedActivityLocked(next)) { mNoAnimActivities.clear(); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return true; } if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return false; } try { // Deliver all pending results. ArrayList a = next.results; if (a != null) { final int N = a.size(); if (!next.finishing && N > 0) { if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "Delivering results to " + next + ": " + a); next.app.thread.scheduleSendResult(next.appToken, a); } } if (next.newIntents != null) { next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); } // Well the app will no longer be stopped. // Clear app token stopped state in window manager if needed. mWindowManager.notifyAppStopped(next.appToken, false); EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, next.userId, System.identityHashCode(next), next.task.taskId, next.shortComponentName); next.sleeping = false; mService.showUnsupportedZoomDialogIfNeededLocked(next); mService.showAskCompatModeDialogLocked(next); next.app.pendingUiClean = true; next.app.forceProcessStateUpTo(mService.mTopProcessState); next.clearOptionsLocked(); next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, mService.isNextTransitionForward(), resumeAnimOptions); mStackSupervisor.checkReadyForSleepLocked(); if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Resumed " + next); } catch (Exception e) { // Whoops, need to restart this activity! if (DEBUG_STATES) Slog.v(TAG_STATES, "Resume failed; resetting state to " + lastState + ": " + next); next.state = lastState; if (lastStack != null) { lastStack.mResumedActivity = lastResumedActivity; } Slog.i(TAG, "Restarting because process died: " + next); if (!next.hasBeenLaunched) { next.hasBeenLaunched = true; } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && mStackSupervisor.isFrontStack(lastStack)) { next.showStartingWindow(null, true); } mStackSupervisor.startSpecificActivityLocked(next, true, false); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return true; } // From this point on, if something goes wrong there is no way // to recover the activity. try { completeResumeLocked(next); } catch (Exception e) { // If any exception gets thrown, toss away this // activity and try the next one. Slog.w(TAG, "Exception thrown during resume of " + next, e); requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, "resume-exception", true); if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return true; } } else { // Whoops, need to restart this activity! if (!next.hasBeenLaunched) { next.hasBeenLaunched = true; } else { if (SHOW_APP_STARTING_PREVIEW) { next.showStartingWindow(null, true); } if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Restarting: " + next); } if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Restarting " + next); mStackSupervisor.startSpecificActivityLocked(next, true, true); } if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); return true; } private TaskRecord getNextTask(TaskRecord targetTask) { final int index = mTaskHistory.indexOf(targetTask); if (index >= 0) { final int numTasks = mTaskHistory.size(); for (int i = index + 1; i < numTasks; ++i) { TaskRecord task = mTaskHistory.get(i); if (task.userId == targetTask.userId) { return task; } } } return null; } private void insertTaskAtPosition(TaskRecord task, int position) { if (position >= mTaskHistory.size()) { insertTaskAtTop(task, null); return; } // Calculate maximum possible position for this task. int maxPosition = mTaskHistory.size(); if (!mStackSupervisor.isCurrentProfileLocked(task.userId) && task.topRunningActivityLocked() == null) { // Put non-current user tasks below current user tasks. while (maxPosition > 0) { final TaskRecord tmpTask = mTaskHistory.get(maxPosition - 1); if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) || tmpTask.topRunningActivityLocked() == null) { break; } maxPosition--; } } position = Math.min(position, maxPosition); mTaskHistory.remove(task); mTaskHistory.add(position, task); updateTaskMovement(task, true); } private void insertTaskAtTop(TaskRecord task, ActivityRecord newActivity) { // If the moving task is over home stack, transfer its return type to next task if (task.isOverHomeStack()) { final TaskRecord nextTask = getNextTask(task); if (nextTask != null) { nextTask.setTaskToReturnTo(task.getTaskToReturnTo()); } } // If this is being moved to the top by another activity or being launched from the home // activity, set mTaskToReturnTo accordingly. if (isOnHomeDisplay()) { ActivityStack lastStack = mStackSupervisor.getLastStack(); final boolean fromHome = lastStack.isHomeStack(); if (!isHomeStack() && (fromHome || topTask() != task)) { int returnToType = APPLICATION_ACTIVITY_TYPE; if (fromHome && StackId.allowTopTaskToReturnHome(mStackId)) { returnToType = lastStack.topTask() == null ? HOME_ACTIVITY_TYPE : lastStack.topTask().taskType; } task.setTaskToReturnTo(returnToType); } } else { task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); } mTaskHistory.remove(task); // Now put task at top. int taskNdx = mTaskHistory.size(); final boolean notShownWhenLocked = (newActivity != null && (newActivity.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) || (newActivity == null && task.topRunningActivityLocked() == null); if (!mStackSupervisor.isCurrentProfileLocked(task.userId) && notShownWhenLocked) { // Put non-current user tasks below current user tasks. while (--taskNdx >= 0) { final TaskRecord tmpTask = mTaskHistory.get(taskNdx); if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) || tmpTask.topRunningActivityLocked() == null) { break; } } ++taskNdx; } mTaskHistory.add(taskNdx, task); updateTaskMovement(task, true); } final void startActivityLocked(ActivityRecord r, boolean newTask, boolean keepCurTransition, ActivityOptions options) { TaskRecord rTask = r.task; final int taskId = rTask.taskId; // mLaunchTaskBehind tasks get placed at the back of the task stack. if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { // Last activity in task had been removed or ActivityManagerService is reusing task. // Insert or replace. // Might not even be in. insertTaskAtTop(rTask, r); mWindowManager.moveTaskToTop(taskId); } TaskRecord task = null; if (!newTask) { // If starting in an existing task, find where that is... boolean startIt = true; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { task = mTaskHistory.get(taskNdx); if (task.getTopActivity() == null) { // All activities in task are finishing. continue; } if (task == r.task) { // Here it is! Now, if this is not yet visible to the // user, then just add it without starting; it will // get started when the user navigates back to it. if (!startIt) { if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " + task, new RuntimeException("here").fillInStackTrace()); task.addActivityToTop(r); r.putInHistory(); addConfigOverride(r, task); if (VALIDATE_TOKENS) { validateAppTokensLocked(); } ActivityOptions.abort(options); return; } break; } else if (task.numFullscreen > 0) { startIt = false; } } } // Place a new activity at top of stack, so it is next to interact // with the user. // If we are not placing the new activity frontmost, we do not want // to deliver the onUserLeaving callback to the actual frontmost // activity if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { mStackSupervisor.mUserLeaving = false; if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, "startActivity() behind front, mUserLeaving=false"); } task = r.task; // Slot the activity into the history stack and proceed if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, new RuntimeException("here").fillInStackTrace()); task.addActivityToTop(r); task.setFrontOfTask(); r.putInHistory(); if (!isHomeStack() || numActivities() > 0) { // We want to show the starting preview window if we are // switching to a new task, or the next activity's process is // not currently running. boolean showStartingIcon = newTask; ProcessRecord proc = r.app; if (proc == null) { proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); } if (proc == null || proc.thread == null) { showStartingIcon = true; } if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare open transition: starting " + r); if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { mWindowManager.prepareAppTransition(TRANSIT_NONE, keepCurTransition); mNoAnimActivities.add(r); } else { mWindowManager.prepareAppTransition(newTask ? r.mLaunchTaskBehind ? TRANSIT_TASK_OPEN_BEHIND : TRANSIT_TASK_OPEN : TRANSIT_ACTIVITY_OPEN, keepCurTransition); mNoAnimActivities.remove(r); } addConfigOverride(r, task); boolean doShow = true; if (newTask) { // Even though this activity is starting fresh, we still need // to reset it to make sure we apply affinities to move any // existing activities from other tasks in to it. // If the caller has requested that the target task be // reset, then do so. if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { resetTaskIfNeededLocked(r, r); doShow = topRunningNonDelayedActivityLocked(null) == r; } } else if (options != null && options.getAnimationType() == ActivityOptions.ANIM_SCENE_TRANSITION) { doShow = false; } if (r.mLaunchTaskBehind) { // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we // tell WindowManager that r is visible even though it is at the back of the stack. mWindowManager.setAppVisibility(r.appToken, true); ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); } else if (SHOW_APP_STARTING_PREVIEW && doShow) { // Figure out if we are transitioning from another activity that is // "has the same starting icon" as the next one. This allows the // window manager to keep the previous window it had previously // created, if it still had one. ActivityRecord prev = r.task.topRunningActivityWithStartingWindowLocked(); 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; } } r.showStartingWindow(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. addConfigOverride(r, task); ActivityOptions.abort(options); options = null; } if (VALIDATE_TOKENS) { validateAppTokensLocked(); } } final void validateAppTokensLocked() { mValidateAppTokens.clear(); mValidateAppTokens.ensureCapacity(numActivities()); final int numTasks = mTaskHistory.size(); for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { TaskRecord task = mTaskHistory.get(taskNdx); final ArrayList activities = task.mActivities; if (activities.isEmpty()) { continue; } TaskGroup group = new TaskGroup(); group.taskId = task.taskId; mValidateAppTokens.add(group); final int numActivities = activities.size(); for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { final ActivityRecord r = activities.get(activityNdx); group.tokens.add(r.appToken); } } mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); } /** * Perform a reset of the given task, if needed as part of launching it. * Returns the new HistoryRecord at the top of the task. */ /** * Helper method for #resetTaskIfNeededLocked. * We are inside of the task being reset... we'll either finish this activity, push it out * for another task, or leave it as-is. * @param task The task containing the Activity (taskTop) that might be reset. * @param forceReset * @return An ActivityOptions that needs to be processed. */ final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { ActivityOptions topOptions = null; int replyChainEnd = -1; boolean canMoveOptions = true; // We only do this for activities that are not the root of the task (since if we finish // the root, we may no longer have the task!). final ArrayList activities = task.mActivities; final int numActivities = activities.size(); final int rootActivityNdx = task.findEffectiveRootIndex(); for (int i = numActivities - 1; i > rootActivityNdx; --i ) { ActivityRecord target = activities.get(i); if (target.frontOfTask) break; final int flags = target.info.flags; final boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; final boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; final boolean clearWhenTaskReset = (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; if (!finishOnTaskLaunch && !clearWhenTaskReset && target.resultTo != null) { // If this activity is sending a reply to a previous // activity, we can't do anything with it now until // we reach the start of the reply chain. // XXX note that we are assuming the result is always // to the previous activity, which is almost always // the case but we really shouldn't count on. if (replyChainEnd < 0) { replyChainEnd = i; } } else if (!finishOnTaskLaunch && !clearWhenTaskReset && allowTaskReparenting && target.taskAffinity != null && !target.taskAffinity.equals(task.affinity)) { // If this activity has an affinity for another // task, then we need to move it out of here. We will // move it as far out of the way as possible, to the // bottom of the activity stack. This also keeps it // correctly ordered with any activities we previously // moved. final TaskRecord targetTask; final ActivityRecord bottom = !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? mTaskHistory.get(0).mActivities.get(0) : null; if (bottom != null && target.taskAffinity != null && target.taskAffinity.equals(bottom.task.affinity)) { // If the activity currently at the bottom has the // same task affinity as the one we are moving, // then merge it into the same task. targetTask = bottom.task; if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target + " out to bottom task " + bottom.task); } else { targetTask = createTaskRecord( mStackSupervisor.getNextTaskIdForUserLocked(target.userId), target.info, null, null, null, false); targetTask.affinityIntent = target.intent; if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target + " out to new task " + target.task); } setAppTask(target, targetTask); boolean noOptions = canMoveOptions; final int start = replyChainEnd < 0 ? i : replyChainEnd; for (int srcPos = start; srcPos >= i; --srcPos) { final ActivityRecord p = activities.get(srcPos); if (p.finishing) { continue; } canMoveOptions = false; if (noOptions && topOptions == null) { topOptions = p.takeOptionsLocked(); if (topOptions != null) { noOptions = false; } } if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, "Removing activity " + p + " from task=" + task + " adding to task=" + targetTask + " Callers=" + Debug.getCallers(4)); if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Pushing next activity " + p + " out to target's task " + target.task); p.setTask(targetTask, null); targetTask.addActivityAtBottom(p); setAppTask(p, targetTask); } mWindowManager.moveTaskToBottom(targetTask.taskId); if (VALIDATE_TOKENS) { validateAppTokensLocked(); } replyChainEnd = -1; } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { // If the activity should just be removed -- either // because it asks for it, or the task should be // cleared -- then finish it and anything that is // part of its reply chain. int end; if (clearWhenTaskReset) { // In this case, we want to finish this activity // and everything above it, so be sneaky and pretend // like these are all in the reply chain. end = activities.size() - 1; } else if (replyChainEnd < 0) { end = i; } else { end = replyChainEnd; } boolean noOptions = canMoveOptions; for (int srcPos = i; srcPos <= end; srcPos++) { ActivityRecord p = activities.get(srcPos); if (p.finishing) { continue; } canMoveOptions = false; if (noOptions && topOptions == null) { topOptions = p.takeOptionsLocked(); if (topOptions != null) { noOptions = false; } } if (DEBUG_TASKS) Slog.w(TAG_TASKS, "resetTaskIntendedTask: calling finishActivity on " + p); if (finishActivityLocked( p, Activity.RESULT_CANCELED, null, "reset-task", false)) { end--; srcPos--; } } replyChainEnd = -1; } else { // If we were in the middle of a chain, well the // activity that started it all doesn't want anything // special, so leave it all as-is. replyChainEnd = -1; } } return topOptions; } /** * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. * @param affinityTask The task we are looking for an affinity to. * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. * @param forceReset Flag passed in to resetTaskIfNeededLocked. */ private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { int replyChainEnd = -1; final int taskId = task.taskId; final String taskAffinity = task.affinity; final ArrayList activities = affinityTask.mActivities; final int numActivities = activities.size(); final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); // Do not operate on or below the effective root Activity. for (int i = numActivities - 1; i > rootActivityNdx; --i) { ActivityRecord target = activities.get(i); if (target.frontOfTask) break; final int flags = target.info.flags; boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; if (target.resultTo != null) { // If this activity is sending a reply to a previous // activity, we can't do anything with it now until // we reach the start of the reply chain. // XXX note that we are assuming the result is always // to the previous activity, which is almost always // the case but we really shouldn't count on. if (replyChainEnd < 0) { replyChainEnd = i; } } else if (topTaskIsHigher && allowTaskReparenting && taskAffinity != null && taskAffinity.equals(target.taskAffinity)) { // This activity has an affinity for our task. Either remove it if we are // clearing or move it over to our task. Note that // we currently punt on the case where we are resetting a // task that is not at the top but who has activities above // with an affinity to it... this is really not a normal // case, and we will need to later pull that task to the front // and usually at that point we will do the reset and pick // up those remaining activities. (This only happens if // someone starts an activity in a new task from an activity // in a task that is not currently on top.) if (forceReset || finishOnTaskLaunch) { final int start = replyChainEnd >= 0 ? replyChainEnd : i; if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Finishing task at index " + start + " to " + i); for (int srcPos = start; srcPos >= i; --srcPos) { final ActivityRecord p = activities.get(srcPos); if (p.finishing) { continue; } finishActivityLocked( p, Activity.RESULT_CANCELED, null, "move-affinity", false); } } else { if (taskInsertionPoint < 0) { taskInsertionPoint = task.mActivities.size(); } final int start = replyChainEnd >= 0 ? replyChainEnd : i; if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Reparenting from task=" + affinityTask + ":" + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); for (int srcPos = start; srcPos >= i; --srcPos) { final ActivityRecord p = activities.get(srcPos); p.setTask(task, null); task.addActivityAtIndex(taskInsertionPoint, p); if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, "Removing and adding activity " + p + " to stack at " + task + " callers=" + Debug.getCallers(3)); if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Pulling activity " + p + " from " + srcPos + " in to resetting task " + task); setAppTask(p, task); } mWindowManager.moveTaskToTop(taskId); if (VALIDATE_TOKENS) { validateAppTokensLocked(); } // Now we've moved it in to place... but what if this is // a singleTop activity and we have put it on top of another // instance of the same activity? Then we drop the instance // below so it remains singleTop. if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { ArrayList taskActivities = task.mActivities; int targetNdx = taskActivities.indexOf(target); if (targetNdx > 0) { ActivityRecord p = taskActivities.get(targetNdx - 1); if (p.intent.getComponent().equals(target.intent.getComponent())) { finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", false); } } } } replyChainEnd = -1; } } return taskInsertionPoint; } final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, ActivityRecord newActivity) { boolean forceReset = (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; if (ACTIVITY_INACTIVE_RESET_TIME > 0 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { forceReset = true; } } final TaskRecord task = taskTop.task; /** False until we evaluate the TaskRecord associated with taskTop. Switches to true * for remaining tasks. Used for later tasks to reparent to task. */ boolean taskFound = false; /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ ActivityOptions topOptions = null; // Preserve the location for reparenting in the new task. int reparentInsertionPoint = -1; for (int i = mTaskHistory.size() - 1; i >= 0; --i) { final TaskRecord targetTask = mTaskHistory.get(i); if (targetTask == task) { topOptions = resetTargetTaskIfNeededLocked(task, forceReset); taskFound = true; } else { reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, taskFound, forceReset, reparentInsertionPoint); } } int taskNdx = mTaskHistory.indexOf(task); if (taskNdx >= 0) { do { taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); } while (taskTop == null && taskNdx >= 0); } if (topOptions != null) { // If we got some ActivityOptions from an activity on top that // was removed from the task, propagate them to the new real top. if (taskTop != null) { taskTop.updateOptionsLocked(topOptions); } else { topOptions.abort(); } } return taskTop; } void sendActivityResultLocked(int callingUid, ActivityRecord r, String resultWho, int requestCode, int resultCode, Intent data) { if (callingUid > 0) { mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, data, r.getUriPermissionsLocked(), r.userId); } if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r + " : who=" + resultWho + " req=" + requestCode + " res=" + resultCode + " data=" + data); if (mResumedActivity == r && r.app != null && r.app.thread != null) { try { ArrayList list = new ArrayList(); list.add(new ResultInfo(resultWho, requestCode, resultCode, data)); r.app.thread.scheduleSendResult(r.appToken, list); return; } catch (Exception e) { Slog.w(TAG, "Exception thrown sending result to " + r, e); } } r.addResultLocked(null, resultWho, requestCode, resultCode, data); } private void adjustFocusedActivityLocked(ActivityRecord r, String reason) { if (!mStackSupervisor.isFocusedStack(this) || mService.mFocusedActivity != r) { return; } final ActivityRecord next = topRunningActivityLocked(); final String myReason = reason + " adjustFocus"; if (next != r) { if (next != null && StackId.keepFocusInStackIfPossible(mStackId) && isFocusable()) { // For freeform, docked, and pinned stacks we always keep the focus within the // stack as long as there is a running activity in the stack that we can adjust // focus to. mService.setFocusedActivityLocked(next, myReason); return; } else { final TaskRecord task = r.task; if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { final int taskToReturnTo = task.getTaskToReturnTo(); // For non-fullscreen stack, we want to move the focus to the next visible // stack to prevent the home screen from moving to the top and obscuring // other visible stacks. if (!mFullscreen && adjustFocusToNextFocusableStackLocked(taskToReturnTo, myReason)) { return; } // Move the home stack to the top if this stack is fullscreen or there is no // other visible stack. if (mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, myReason)) { // Activity focus was already adjusted. Nothing else to do... return; } } } } mService.setFocusedActivityLocked(mStackSupervisor.topRunningActivityLocked(), myReason); } private boolean adjustFocusToNextFocusableStackLocked(int taskToReturnTo, String reason) { final ActivityStack stack = getNextFocusableStackLocked(); final String myReason = reason + " adjustFocusToNextFocusableStack"; if (stack == null) { return false; } final ActivityRecord top = stack.topRunningActivityLocked(); if (stack.isHomeStack() && (top == null || !top.visible)) { // If we will be focusing on the home stack next and its current top activity isn't // visible, then use the task return to value to determine the home task to display next. return mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, reason); } return mService.setFocusedActivityLocked(top, myReason); } final void stopActivityLocked(ActivityRecord r) { if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Stopping: " + r); if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { if (!r.finishing) { if (!mService.isSleepingLocked()) { if (DEBUG_STATES) Slog.d(TAG_STATES, "no-history finish of " + r); if (requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, "stop-no-history", false)) { // Activity was finished, no need to continue trying to schedule stop. adjustFocusedActivityLocked(r, "stopActivityFinished"); r.resumeKeyDispatchingLocked(); return; } } else { if (DEBUG_STATES) Slog.d(TAG_STATES, "Not finishing noHistory " + r + " on stop because we're just sleeping"); } } } if (r.app != null && r.app.thread != null) { adjustFocusedActivityLocked(r, "stopActivity"); r.resumeKeyDispatchingLocked(); try { r.stopped = false; if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPING: " + r + " (stop requested)"); r.state = ActivityState.STOPPING; if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Stopping visible=" + r.visible + " for " + r); if (!r.visible) { mWindowManager.setAppVisibility(r.appToken, false); } EventLogTags.writeAmStopActivity( r.userId, System.identityHashCode(r), r.shortComponentName); r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); if (mService.isSleepingOrShuttingDownLocked()) { r.setSleeping(true); } Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); } catch (Exception e) { // Maybe just ignore exceptions here... if the process // has crashed, our death notification will clean things // up. Slog.w(TAG, "Exception thrown during pause", e); // Just in case, assume it to be stopped. r.stopped = true; if (DEBUG_STATES) Slog.v(TAG_STATES, "Stop failed; moving to STOPPED: " + r); r.state = ActivityState.STOPPED; if (r.deferRelaunchUntilPaused) { destroyActivityLocked(r, true, "stop-except"); } } } } /** * @return Returns true if the activity is being finished, false if for * some reason it is being left as-is. */ final boolean requestFinishActivityLocked(IBinder token, int resultCode, Intent resultData, String reason, boolean oomAdj) { ActivityRecord r = isInStackLocked(token); if (DEBUG_RESULTS || DEBUG_STATES) Slog.v(TAG_STATES, "Finishing activity token=" + token + " r=" + ", result=" + resultCode + ", data=" + resultData + ", reason=" + reason); if (r == null) { return false; } finishActivityLocked(r, resultCode, resultData, reason, oomAdj); return true; } final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { ActivityRecord r = activities.get(activityNdx); if (r.resultTo == self && r.requestCode == requestCode) { if ((r.resultWho == null && resultWho == null) || (r.resultWho != null && r.resultWho.equals(resultWho))) { finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", false); } } } } mService.updateOomAdjLocked(); } final TaskRecord finishTopRunningActivityLocked(ProcessRecord app, String reason) { ActivityRecord r = topRunningActivityLocked(); TaskRecord finishedTask = null; if (r == null || r.app != app) { return null; } Slog.w(TAG, " Force finishing activity " + r.intent.getComponent().flattenToShortString()); int taskNdx = mTaskHistory.indexOf(r.task); int activityNdx = r.task.mActivities.indexOf(r); finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); finishedTask = r.task; // Also terminate any activities below it that aren't yet // stopped, to avoid a situation where one will get // re-start our crashing activity once it gets resumed again. --activityNdx; if (activityNdx < 0) { do { --taskNdx; if (taskNdx < 0) { break; } activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; } while (activityNdx < 0); } if (activityNdx >= 0) { r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); if (r.state == ActivityState.RESUMED || r.state == ActivityState.PAUSING || r.state == ActivityState.PAUSED) { if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { Slog.w(TAG, " Force finishing activity " + r.intent.getComponent().flattenToShortString()); finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); } } } return finishedTask; } final void finishVoiceTask(IVoiceInteractionSession session) { IBinder sessionBinder = session.asBinder(); boolean didOne = false; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { TaskRecord tr = mTaskHistory.get(taskNdx); if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { ActivityRecord r = tr.mActivities.get(activityNdx); if (!r.finishing) { finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", false); didOne = true; } } } else { // Check if any of the activities are using voice for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { ActivityRecord r = tr.mActivities.get(activityNdx); if (r.voiceSession != null && r.voiceSession.asBinder() == sessionBinder) { // Inform of cancellation r.clearVoiceSessionLocked(); try { r.app.thread.scheduleLocalVoiceInteractionStarted((IBinder) r.appToken, null); } catch (RemoteException re) { // Ok } mService.finishRunningVoiceLocked(); break; } } } } if (didOne) { mService.updateOomAdjLocked(); } } final boolean finishActivityAffinityLocked(ActivityRecord r) { ArrayList activities = r.task.mActivities; for (int index = activities.indexOf(r); index >= 0; --index) { ActivityRecord cur = activities.get(index); if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { break; } finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); } return true; } final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { // send the result ActivityRecord resultTo = r.resultTo; if (resultTo != null) { if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "Adding result to " + resultTo + " who=" + r.resultWho + " req=" + r.requestCode + " res=" + resultCode + " data=" + resultData); if (resultTo.userId != r.userId) { if (resultData != null) { resultData.prepareToLeaveUser(r.userId); } } if (r.info.applicationInfo.uid > 0) { mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, resultTo.packageName, resultData, resultTo.getUriPermissionsLocked(), resultTo.userId); } resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, resultData); r.resultTo = null; } else if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "No result destination from " + r); // Make sure this HistoryRecord is not holding on to other resources, // because clients have remote IPC references to this object so we // can't assume that will go away and want to avoid circular IPC refs. r.results = null; r.pendingResults = null; r.newIntents = null; r.icicle = null; } /** * @return Returns true if this activity has been removed from the history * list, or false if it is still in the list and will be removed later. */ final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, String reason, boolean oomAdj) { if (r.finishing) { Slog.w(TAG, "Duplicate finish request for " + r); return false; } r.makeFinishingLocked(); final TaskRecord task = r.task; EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, r.userId, System.identityHashCode(r), task.taskId, r.shortComponentName, reason); final ArrayList activities = task.mActivities; final int index = activities.indexOf(r); if (index < (activities.size() - 1)) { task.setFrontOfTask(); if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { // If the caller asked that this activity (and all above it) // be cleared when the task is reset, don't lose that information, // but propagate it up to the next activity. ActivityRecord next = activities.get(index+1); next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); } } r.pauseKeyDispatchingLocked(); adjustFocusedActivityLocked(r, "finishActivity"); finishActivityResultsLocked(r, resultCode, resultData); final boolean endTask = index <= 0; final int transit = endTask ? TRANSIT_TASK_CLOSE : TRANSIT_ACTIVITY_CLOSE; if (mResumedActivity == r) { if (DEBUG_VISIBILITY || DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare close transition: finishing " + r); mWindowManager.prepareAppTransition(transit, false); // Tell window manager to prepare for this one to be removed. mWindowManager.setAppVisibility(r.appToken, false); if (mPausingActivity == null) { if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish needs to pause: " + r); if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, "finish() => pause with userLeaving=false"); startPausingLocked(false, false, false, false); } if (endTask) { mStackSupervisor.removeLockedTaskLocked(task); } } else if (r.state != ActivityState.PAUSING) { // If the activity is PAUSING, we will complete the finish once // it is done pausing; else we can just directly finish it here. if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish not pausing: " + r); if (r.visible) { mWindowManager.prepareAppTransition(transit, false); mWindowManager.setAppVisibility(r.appToken, false); mWindowManager.executeAppTransition(); if (!mStackSupervisor.mWaitingVisibleActivities.contains(r)) { mStackSupervisor.mWaitingVisibleActivities.add(r); } } return finishCurrentActivityLocked(r, (r.visible || r.nowVisible) ? FINISH_AFTER_VISIBLE : FINISH_AFTER_PAUSE, oomAdj) == null; } else { if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish waiting for pause of: " + r); } return false; } static final int FINISH_IMMEDIATELY = 0; static final int FINISH_AFTER_PAUSE = 1; static final int FINISH_AFTER_VISIBLE = 2; final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { // First things first: if this activity is currently visible, // and the resumed activity is not yet visible, then hold off on // finishing until the resumed one becomes visible. final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); if (mode == FINISH_AFTER_VISIBLE && (r.visible || r.nowVisible) && next != null && !next.nowVisible) { if (!mStackSupervisor.mStoppingActivities.contains(r)) { addToStopping(r, false /* immediate */); } if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPING: "+ r + " (finish requested)"); r.state = ActivityState.STOPPING; if (oomAdj) { mService.updateOomAdjLocked(); } return r; } // make sure the record is cleaned out of other places. mStackSupervisor.mStoppingActivities.remove(r); mStackSupervisor.mGoingToSleepActivities.remove(r); mStackSupervisor.mWaitingVisibleActivities.remove(r); if (mResumedActivity == r) { mResumedActivity = null; } final ActivityState prevState = r.state; if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to FINISHING: " + r); r.state = ActivityState.FINISHING; if (mode == FINISH_IMMEDIATELY || (prevState == ActivityState.PAUSED && (mode == FINISH_AFTER_PAUSE || mStackId == PINNED_STACK_ID)) || prevState == ActivityState.STOPPED || prevState == ActivityState.INITIALIZING) { r.makeFinishingLocked(); boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); if (activityRemoved) { mStackSupervisor.resumeFocusedStackTopActivityLocked(); } if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, "destroyActivityLocked: finishCurrentActivityLocked r=" + r + " destroy returned removed=" + activityRemoved); return activityRemoved ? null : r; } // Need to go through the full pause cycle to get this // activity into the stopped state and then finish it. if (DEBUG_ALL) Slog.v(TAG, "Enqueueing pending finish: " + r); mStackSupervisor.mFinishingActivities.add(r); r.resumeKeyDispatchingLocked(); mStackSupervisor.resumeFocusedStackTopActivityLocked(); return r; } void finishAllActivitiesLocked(boolean immediately) { boolean noActivitiesInStack = true; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); noActivitiesInStack = false; if (r.finishing && !immediately) { continue; } Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); } } if (noActivitiesInStack) { mActivityContainer.onTaskListEmptyLocked(); } } final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { // Basic case: for simple app-centric recents, we need to recreate // the task if the affinity has changed. if (srec == null || srec.task.affinity == null || !srec.task.affinity.equals(destAffinity)) { return true; } // Document-centric case: an app may be split in to multiple documents; // they need to re-create their task if this current activity is the root // of a document, unless simply finishing it will return them to the the // correct app behind. if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null && srec.task.getBaseIntent().isDocument()) { // Okay, this activity is at the root of its task. What to do, what to do... if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { // Finishing won't return to an application, so we need to recreate. return true; } // We now need to get the task below it to determine what to do. int taskIdx = mTaskHistory.indexOf(srec.task); if (taskIdx <= 0) { Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); return false; } if (taskIdx == 0) { // At the bottom of the stack, nothing to go back to. return true; } TaskRecord prevTask = mTaskHistory.get(taskIdx); if (!srec.task.affinity.equals(prevTask.affinity)) { // These are different apps, so need to recreate. return true; } } return false; } final boolean navigateUpToLocked(ActivityRecord srec, Intent destIntent, int resultCode, Intent resultData) { final TaskRecord task = srec.task; final ArrayList activities = task.mActivities; final int start = activities.indexOf(srec); if (!mTaskHistory.contains(task) || (start < 0)) { return false; } int finishTo = start - 1; ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); boolean foundParentInTask = false; final ComponentName dest = destIntent.getComponent(); if (start > 0 && dest != null) { for (int i = finishTo; i >= 0; i--) { ActivityRecord r = activities.get(i); if (r.info.packageName.equals(dest.getPackageName()) && r.info.name.equals(dest.getClassName())) { finishTo = i; parent = r; foundParentInTask = true; break; } } } IActivityController controller = mService.mController; if (controller != null) { ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); if (next != null) { // ask watcher if this is allowed boolean resumeOK = true; try { resumeOK = controller.activityResuming(next.packageName); } catch (RemoteException e) { mService.mController = null; Watchdog.getInstance().setActivityController(null); } if (!resumeOK) { return false; } } } final long origId = Binder.clearCallingIdentity(); for (int i = start; i > finishTo; i--) { ActivityRecord r = activities.get(i); requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); // Only return the supplied result for the first activity finished resultCode = Activity.RESULT_CANCELED; resultData = null; } if (parent != null && foundParentInTask) { final int parentLaunchMode = parent.info.launchMode; final int destIntentFlags = destIntent.getFlags(); if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent, srec.packageName); } else { try { ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( destIntent.getComponent(), 0, srec.userId); int res = mService.mActivityStarter.startActivityLocked(srec.app.thread, destIntent, null /*ephemeralIntent*/, null, aInfo, null /*rInfo*/, null, null, parent.appToken, null, 0, -1, parent.launchedFromUid, parent.launchedFromPackage, -1, parent.launchedFromUid, 0, null, false, true, null, null, null); foundParentInTask = res == ActivityManager.START_SUCCESS; } catch (RemoteException e) { foundParentInTask = false; } requestFinishActivityLocked(parent.appToken, resultCode, resultData, "navigate-top", true); } } Binder.restoreCallingIdentity(origId); return foundParentInTask; } /** * Perform the common clean-up of an activity record. This is called both * as part of destroyActivityLocked() (when destroying the client-side * representation) and cleaning things up as a result of its hosting * processing going away, in which case there is no remaining client-side * state to destroy so only the cleanup here is needed. * * Note: Call before #removeActivityFromHistoryLocked. */ final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, boolean setState) { if (mResumedActivity == r) { mResumedActivity = null; } if (mPausingActivity == r) { mPausingActivity = null; } mService.resetFocusedActivityIfNeededLocked(r); r.deferRelaunchUntilPaused = false; r.frozenBeforeDestroy = false; if (setState) { if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (cleaning up)"); r.state = ActivityState.DESTROYED; if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during cleanUp for activity " + r); r.app = null; } // Make sure this record is no longer in the pending finishes list. // This could happen, for example, if we are trimming activities // down to the max limit while they are still waiting to finish. mStackSupervisor.mFinishingActivities.remove(r); mStackSupervisor.mWaitingVisibleActivities.remove(r); // Remove any pending results. if (r.finishing && r.pendingResults != null) { for (WeakReference apr : r.pendingResults) { PendingIntentRecord rec = apr.get(); if (rec != null) { mService.cancelIntentSenderLocked(rec, false); } } r.pendingResults = null; } if (cleanServices) { cleanUpActivityServicesLocked(r); } // Get rid of any pending idle timeouts. removeTimeoutsForActivityLocked(r); if (getVisibleBehindActivity() == r) { mStackSupervisor.requestVisibleBehindLocked(r, false); } } private void removeTimeoutsForActivityLocked(ActivityRecord r) { mStackSupervisor.removeTimeoutsForActivityLocked(r); mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); mHandler.removeMessages(STOP_TIMEOUT_MSG, r); mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); r.finishLaunchTickingLocked(); } private void removeActivityFromHistoryLocked( ActivityRecord r, TaskRecord oldTop, String reason) { mStackSupervisor.removeChildActivityContainers(r); finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); r.makeFinishingLocked(); if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, "Removing activity " + r + " from stack callers=" + Debug.getCallers(5)); r.takeFromHistory(); removeTimeoutsForActivityLocked(r); if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (removed from history)"); r.state = ActivityState.DESTROYED; if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during remove for activity " + r); r.app = null; mWindowManager.removeAppToken(r.appToken); if (VALIDATE_TOKENS) { validateAppTokensLocked(); } final TaskRecord task = r.task; final TaskRecord topTask = oldTop != null ? oldTop : topTask(); if (task != null && task.removeActivity(r)) { if (DEBUG_STACK) Slog.i(TAG_STACK, "removeActivityFromHistoryLocked: last activity removed from " + this); if (mStackSupervisor.isFocusedStack(this) && task == topTask && task.isOverHomeStack()) { mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo(), reason); } removeTask(task, reason); } 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.mServices.removeConnectionLocked(c, null, r); } r.connections = null; } } final void scheduleDestroyActivities(ProcessRecord owner, String reason) { Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); msg.obj = new ScheduleDestroyArgs(owner, reason); mHandler.sendMessage(msg); } final void destroyActivitiesLocked(ProcessRecord owner, String reason) { boolean lastIsOpaque = false; boolean activityRemoved = false; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if (r.finishing) { continue; } if (r.fullscreen) { lastIsOpaque = true; } if (owner != null && r.app != owner) { continue; } if (!lastIsOpaque) { continue; } if (r.isDestroyable()) { if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Destroying " + r + " in state " + r.state + " resumed=" + mResumedActivity + " pausing=" + mPausingActivity + " for reason " + reason); if (destroyActivityLocked(r, true, reason)) { activityRemoved = true; } } } } if (activityRemoved) { mStackSupervisor.resumeFocusedStackTopActivityLocked(); } } final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { if (r.isDestroyable()) { if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Destroying " + r + " in state " + r.state + " resumed=" + mResumedActivity + " pausing=" + mPausingActivity + " for reason " + reason); return destroyActivityLocked(r, true, reason); } return false; } final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet tasks, String reason) { // Iterate over tasks starting at the back (oldest) first. if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Trying to release some activities in " + app); int maxTasks = tasks.size() / 4; if (maxTasks < 1) { maxTasks = 1; } int numReleased = 0; for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { final TaskRecord task = mTaskHistory.get(taskNdx); if (!tasks.contains(task)) { continue; } if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Looking for activities to release in " + task); int curNum = 0; final ArrayList activities = task.mActivities; for (int actNdx = 0; actNdx < activities.size(); actNdx++) { final ActivityRecord activity = activities.get(actNdx); if (activity.app == app && activity.isDestroyable()) { if (DEBUG_RELEASE) Slog.v(TAG_RELEASE, "Destroying " + activity + " in state " + activity.state + " resumed=" + mResumedActivity + " pausing=" + mPausingActivity + " for reason " + reason); destroyActivityLocked(activity, true, reason); if (activities.get(actNdx) != activity) { // Was removed from list, back up so we don't miss the next one. actNdx--; } curNum++; } } if (curNum > 0) { numReleased += curNum; maxTasks--; if (mTaskHistory.get(taskNdx) != task) { // The entire task got removed, back up so we don't miss the next one. taskNdx--; } } } if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Done releasing: did " + numReleased + " activities"); return numReleased; } /** * Destroy the current CLIENT SIDE instance of an activity. This may be * called both when actually finishing an activity, or when performing * a configuration switch where we destroy the current client-side object * but then create a new client-side object for this same HistoryRecord. */ final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v(TAG_SWITCH, "Removing activity from " + reason + ": token=" + r + ", app=" + (r.app != null ? r.app.processName : "(null)")); EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, r.userId, System.identityHashCode(r), r.task.taskId, r.shortComponentName, reason); boolean removedFromHistory = false; // If the activity is finishing, it's no longer considered in topRunningActivityLocked, // and cleanUpActivityLocked() may change focus to another activity (or task). // Get the current top task now, as removeActivityFromHistoryLocked() below need this // to decide whether to return to home stack after removal. final TaskRecord topTask = topTask(); cleanUpActivityLocked(r, false, false); final boolean hadApp = r.app != null; if (hadApp) { if (removeFromApp) { r.app.activities.remove(r); if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { mService.mHeavyWeightProcess = null; mService.mHandler.sendEmptyMessage( ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); } if (r.app.activities.isEmpty()) { // Update any services we are bound to that might care about whether // their client may have activities. mService.mServices.updateServiceConnectionActivitiesLocked(r.app); // No longer have activities, so update LRU list and oom adj. mService.updateLruProcessLocked(r.app, false, null); mService.updateOomAdjLocked(); } } boolean skipDestroy = false; try { if (DEBUG_SWITCH) Slog.i(TAG_SWITCH, "Destroying: " + r); r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, r.configChangeFlags); } catch (Exception e) { // We can just ignore exceptions here... if the process // has crashed, our death notification will clean things // up. //Slog.w(TAG, "Exception thrown during finish", e); if (r.finishing) { removeActivityFromHistoryLocked( r, topTask, reason + " exceptionInScheduleDestroy"); removedFromHistory = true; skipDestroy = true; } } r.nowVisible = false; // If the activity is finishing, we need to wait on removing it // from the list to give it a chance to do its cleanup. During // that time it may make calls back with its token so we need to // be able to find it on the list and so we don't want to remove // it from the list yet. Otherwise, we can just immediately put // it in the destroyed state since we are not removing it from the // list. if (r.finishing && !skipDestroy) { if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYING: " + r + " (destroy requested)"); r.state = ActivityState.DESTROYING; Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); } else { if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (destroy skipped)"); r.state = ActivityState.DESTROYED; if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); r.app = null; } } else { // remove this record from the history. if (r.finishing) { removeActivityFromHistoryLocked(r, topTask, reason + " hadNoApp"); removedFromHistory = true; } else { if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (no app)"); r.state = ActivityState.DESTROYED; if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); r.app = null; } } r.configChangeFlags = 0; if (!mLRUActivities.remove(r) && hadApp) { Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); } return removedFromHistory; } final void activityDestroyedLocked(IBinder token, String reason) { final long origId = Binder.clearCallingIdentity(); try { ActivityRecord r = ActivityRecord.forTokenLocked(token); if (r != null) { mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); } if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, "activityDestroyedLocked: r=" + r); if (isInStackLocked(r) != null) { if (r.state == ActivityState.DESTROYING) { cleanUpActivityLocked(r, true, false); removeActivityFromHistoryLocked(r, null, reason); } } mStackSupervisor.resumeFocusedStackTopActivityLocked(); } finally { Binder.restoreCallingIdentity(origId); } } void releaseBackgroundResources(ActivityRecord r) { if (hasVisibleBehindActivity() && !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { if (r == topRunningActivityLocked() && getStackVisibilityLocked(null) == STACK_VISIBLE) { // Don't release the top activity if it has requested to run behind the next // activity and the stack is currently visible. return; } if (DEBUG_STATES) Slog.d(TAG_STATES, "releaseBackgroundResources activtyDisplay=" + mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + " thread=" + r.app.thread); if (r != null && r.app != null && r.app.thread != null) { try { r.app.thread.scheduleCancelVisibleBehind(r.appToken); } catch (RemoteException e) { } mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); } else { Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); backgroundResourcesReleased(); } } } final void backgroundResourcesReleased() { mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); final ActivityRecord r = getVisibleBehindActivity(); if (r != null) { mStackSupervisor.mStoppingActivities.add(r); setVisibleBehindActivity(null); mStackSupervisor.scheduleIdleTimeoutLocked(null); } mStackSupervisor.resumeFocusedStackTopActivityLocked(); } boolean hasVisibleBehindActivity() { return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); } void setVisibleBehindActivity(ActivityRecord r) { if (isAttached()) { mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); } } ActivityRecord getVisibleBehindActivity() { return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; } private void removeHistoryRecordsForAppLocked(ArrayList list, ProcessRecord app, String listName) { int i = list.size(); if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Removing app " + app + " from list " + listName + " with " + i + " entries"); while (i > 0) { i--; ActivityRecord r = list.get(i); if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Record #" + i + " " + r); if (r.app == app) { if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "---> REMOVING this entry!"); list.remove(i); removeTimeoutsForActivityLocked(r); } } } boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, "mStoppingActivities"); removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, "mGoingToSleepActivities"); removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, "mWaitingVisibleActivities"); removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, "mFinishingActivities"); boolean hasVisibleActivities = false; // Clean out the history list. int i = numActivities(); if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Removing app " + app + " from history with " + i + " entries"); for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); --i; if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Record #" + i + " " + r + ": app=" + r.app); if (r.app == app) { if (r.visible) { hasVisibleActivities = true; } final boolean remove; if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { // Don't currently have state for the activity, or // it is finishing -- always remove it. remove = true; } else if (!r.visible && r.launchCount > 2 && r.lastLaunchTime > (SystemClock.uptimeMillis() - 60000)) { // We have launched this activity too many times since it was // able to run, so give up and remove it. // (Note if the activity is visible, we don't remove the record. // We leave the dead window on the screen but the process will // not be restarted unless user explicitly tap on it.) remove = true; } else { // The process may be gone, but the activity lives on! remove = false; } if (remove) { if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) Slog.i(TAG_ADD_REMOVE, "Removing activity " + r + " from stack at " + i + ": haveState=" + r.haveState + " stateNotNeeded=" + r.stateNotNeeded + " finishing=" + r.finishing + " state=" + r.state + " callers=" + Debug.getCallers(5)); if (!r.finishing) { Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, r.userId, System.identityHashCode(r), r.task.taskId, r.shortComponentName, "proc died without state saved"); if (r.state == ActivityState.RESUMED) { mService.updateUsageStats(r, false); } } } else { // We have the current state for this activity, so // it can be restarted later when needed. if (DEBUG_ALL) Slog.v(TAG, "Keeping entry, setting app to null"); if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during removeHistory for activity " + r); r.app = null; // Set nowVisible to previous visible state. If the app was visible while // it died, we leave the dead window on screen so it's basically visible. // This is needed when user later tap on the dead window, we need to stop // other apps when user transfers focus to the restarted activity. r.nowVisible = r.visible; if (!r.haveState) { if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "App died, clearing saved state of " + r); r.icicle = null; } } cleanUpActivityLocked(r, true, true); if (remove) { removeActivityFromHistoryLocked(r, null, "appDied"); } } } } return hasVisibleActivities; } final void updateTransitLocked(int transit, ActivityOptions options) { if (options != null) { ActivityRecord r = topRunningActivityLocked(); if (r != null && r.state != ActivityState.RESUMED) { r.updateOptionsLocked(options); } else { ActivityOptions.abort(options); } } mWindowManager.prepareAppTransition(transit, false); } void updateTaskMovement(TaskRecord task, boolean toFront) { if (task.isPersistable) { task.mLastTimeMoved = System.currentTimeMillis(); // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most // recently will be most negative, tasks sent to the bottom before that will be less // negative. Similarly for recent tasks moved to the top which will be most positive. if (!toFront) { task.mLastTimeMoved *= -1; } } mStackSupervisor.invalidateTaskLayers(); } void moveHomeStackTaskToTop(int homeStackTaskType) { final int top = mTaskHistory.size() - 1; for (int taskNdx = top; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); if (task.taskType == homeStackTaskType) { if (DEBUG_TASKS || DEBUG_STACK) Slog.d(TAG_STACK, "moveHomeStackTaskToTop: moving " + task); mTaskHistory.remove(taskNdx); mTaskHistory.add(top, task); updateTaskMovement(task, true); return; } } } final void moveTaskToFrontLocked(TaskRecord tr, boolean noAnimation, ActivityOptions options, AppTimeTracker timeTracker, String reason) { if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "moveTaskToFront: " + tr); final int numTasks = mTaskHistory.size(); final int index = mTaskHistory.indexOf(tr); if (numTasks == 0 || index < 0) { // nothing to do! if (noAnimation) { ActivityOptions.abort(options); } else { updateTransitLocked(TRANSIT_TASK_TO_FRONT, options); } return; } if (timeTracker != null) { // The caller wants a time tracker associated with this task. for (int i = tr.mActivities.size() - 1; i >= 0; i--) { tr.mActivities.get(i).appTimeTracker = timeTracker; } } // Shift all activities with this task up to the top // of the stack, keeping them in the same internal order. insertTaskAtTop(tr, null); // Don't refocus if invisible to current user ActivityRecord top = tr.getTopActivity(); if (!okToShowLocked(top)) { addRecentActivityLocked(top); ActivityOptions.abort(options); return; } // Set focus to the top running activity of this stack. ActivityRecord r = topRunningActivityLocked(); mService.setFocusedActivityLocked(r, reason); if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to front transition: task=" + tr); if (noAnimation) { mWindowManager.prepareAppTransition(TRANSIT_NONE, false); if (r != null) { mNoAnimActivities.add(r); } ActivityOptions.abort(options); } else { updateTransitLocked(TRANSIT_TASK_TO_FRONT, options); } mStackSupervisor.resumeFocusedStackTopActivityLocked(); EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); if (VALIDATE_TOKENS) { validateAppTokensLocked(); } } /** * Worker method for rearranging history stack. Implements the function of moving all * activities for a specific task (gathering them if disjoint) into a single group at the * bottom of the stack. * * If a watcher is installed, the action is preflighted and the watcher has an opportunity * to premeptively cancel the move. * * @param taskId The taskId to collect and move to the bottom. * @return Returns true if the move completed, false if not. */ final boolean moveTaskToBackLocked(int taskId) { final TaskRecord tr = taskForIdLocked(taskId); if (tr == null) { Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); return false; } Slog.i(TAG, "moveTaskToBack: " + tr); mStackSupervisor.removeLockedTaskLocked(tr); // If we have a watcher, preflight the move before committing to it. First check // for *other* available tasks, but if none are available, then try again allowing the // current task to be selected. if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { ActivityRecord next = topRunningActivityLocked(null, taskId); if (next == null) { next = topRunningActivityLocked(null, 0); } if (next != null) { // ask watcher if this is allowed boolean moveOK = true; try { moveOK = mService.mController.activityResuming(next.packageName); } catch (RemoteException e) { mService.mController = null; Watchdog.getInstance().setActivityController(null); } if (!moveOK) { return false; } } } if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to back transition: task=" + taskId); if (mStackId == HOME_STACK_ID && topTask().isHomeTask()) { // For the case where we are moving the home task back and there is an activity visible // behind it on the fullscreen stack, we want to move the focus to the visible behind // activity to maintain order with what the user is seeing. final ActivityStack fullscreenStack = mStackSupervisor.getStack(FULLSCREEN_WORKSPACE_STACK_ID); if (fullscreenStack != null && fullscreenStack.hasVisibleBehindActivity()) { final ActivityRecord visibleBehind = fullscreenStack.getVisibleBehindActivity(); mService.setFocusedActivityLocked(visibleBehind, "moveTaskToBack"); mStackSupervisor.resumeFocusedStackTopActivityLocked(); return true; } } boolean prevIsHome = false; // If true, we should resume the home activity next if the task we are moving to the // back is over the home stack. We force to false if the task we are moving to back // is the home task and we don't want it resumed after moving to the back. final boolean canGoHome = !tr.isHomeTask() && tr.isOverHomeStack(); if (canGoHome) { final TaskRecord nextTask = getNextTask(tr); if (nextTask != null) { nextTask.setTaskToReturnTo(tr.getTaskToReturnTo()); } else { prevIsHome = true; } } mTaskHistory.remove(tr); mTaskHistory.add(0, tr); updateTaskMovement(tr, false); // There is an assumption that moving a task to the back moves it behind the home activity. // We make sure here that some activity in the stack will launch home. int numTasks = mTaskHistory.size(); for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); if (task.isOverHomeStack()) { break; } if (taskNdx == 1) { // Set the last task before tr to go to home. task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); } } mWindowManager.prepareAppTransition(TRANSIT_TASK_TO_BACK, false); mWindowManager.moveTaskToBottom(taskId); if (VALIDATE_TOKENS) { validateAppTokensLocked(); } final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; if (prevIsHome || (task == tr && canGoHome) || (numTasks <= 1 && isOnHomeDisplay())) { if (!mService.mBooting && !mService.mBooted) { // Not ready yet! return false; } final int taskToReturnTo = tr.getTaskToReturnTo(); tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null, "moveTaskToBack"); } mStackSupervisor.resumeFocusedStackTopActivityLocked(); return true; } static final void logStartActivity(int tag, ActivityRecord r, TaskRecord task) { final Uri data = r.intent.getData(); final String strData = data != null ? data.toSafeString() : null; EventLog.writeEvent(tag, r.userId, System.identityHashCode(r), task.taskId, r.shortComponentName, r.intent.getAction(), r.intent.getType(), strData, r.intent.getFlags()); } /** * Ensures all visible activities at or below the input activity have the right configuration. */ void ensureVisibleActivitiesConfigurationLocked(ActivityRecord start, boolean preserveWindow) { if (start == null || !start.visible) { return; } final TaskRecord startTask = start.task; boolean behindFullscreen = false; boolean updatedConfig = false; for (int taskIndex = mTaskHistory.indexOf(startTask); taskIndex >= 0; --taskIndex) { final TaskRecord task = mTaskHistory.get(taskIndex); final ArrayList activities = task.mActivities; int activityIndex = (start.task == task) ? activities.indexOf(start) : activities.size() - 1; for (; activityIndex >= 0; --activityIndex) { final ActivityRecord r = activities.get(activityIndex); updatedConfig |= ensureActivityConfigurationLocked(r, 0, preserveWindow); if (r.fullscreen) { behindFullscreen = true; break; } } if (behindFullscreen) { break; } } if (updatedConfig) { // Ensure the resumed state of the focus activity if we updated the configuration of // any activity. mStackSupervisor.resumeFocusedStackTopActivityLocked(); } } /** * 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. */ boolean ensureActivityConfigurationLocked( ActivityRecord r, int globalChanges, boolean preserveWindow) { if (mConfigWillChange) { if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Skipping config check (will change): " + r); return true; } // TODO: We could probably make the condition below just check that the activity state is // stopped, but also checking the sleep state for now to reduce change impact late in // development cycle. if (mService.isSleepingOrShuttingDownLocked() && r.state == ActivityState.STOPPED) { if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Skipping config check (stopped while sleeping): " + r); return true; } if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Ensuring correct configuration: " + r); // Short circuit: if the two configurations are equal (the common case), then there is // nothing to do. final Configuration newConfig = mService.mConfiguration; r.task.sanitizeOverrideConfiguration(newConfig); final Configuration taskConfig = r.task.mOverrideConfig; if (r.configuration.equals(newConfig) && r.taskConfigOverride.equals(taskConfig) && !r.forceNewConfig) { if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "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, "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. final Configuration oldConfig = r.configuration; final Configuration oldTaskOverride = r.taskConfigOverride; r.configuration = newConfig; r.taskConfigOverride = taskConfig; int taskChanges = getTaskConfigurationChanges(r, taskConfig, oldTaskOverride); final int changes = oldConfig.diff(newConfig) | taskChanges; if (changes == 0 && !r.forceNewConfig) { if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Configuration no differences in " + r); // There are no significant differences, so we won't relaunch but should still deliver // the new configuration to the client process. r.scheduleConfigurationChanged(taskConfig, true); return true; } if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Configuration changes for " + r + " ; taskChanges=" + Configuration.configurationDiffToString(taskChanges) + ", allChanges=" + Configuration.configurationDiffToString(changes)); // 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, "Configuration doesn't matter not running " + r); r.stopFreezingScreenLocked(false); r.forceNewConfig = false; return true; } // Figure out how to handle the changes between the configurations. if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Checking to restart " + r.info.name + ": changed=0x" + Integer.toHexString(changes) + ", handles=0x" + Integer.toHexString(r.info.getRealConfigChanged()) + ", newConfig=" + newConfig + ", taskConfig=" + taskConfig); if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { // Aha, the activity isn't handling the change, so DIE DIE DIE. r.configChangeFlags |= changes; r.startFreezingScreenLocked(r.app, globalChanges); r.forceNewConfig = false; preserveWindow &= isResizeOnlyChange(changes); if (r.app == null || r.app.thread == null) { if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Config is destroying non-running " + r); destroyActivityLocked(r, true, "config"); } else if (r.state == ActivityState.PAUSING) { // A little annoying: we are waiting for this activity to finish pausing. Let's not // do anything now, but just flag that it needs to be restarted when done pausing. if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Config is skipping already pausing " + r); r.deferRelaunchUntilPaused = true; r.preserveWindowOnDeferredRelaunch = preserveWindow; 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_CONFIGURATION, "Config is relaunching resumed " + r); if (DEBUG_STATES && !r.visible) { Slog.v(TAG_STATES, "Config is relaunching resumed invisible activity " + r + " called by " + Debug.getCallers(4)); } relaunchActivityLocked(r, r.configChangeFlags, true, preserveWindow); } else { if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Config is relaunching non-resumed " + r); relaunchActivityLocked(r, r.configChangeFlags, false, preserveWindow); } // 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: We only forward the task override configuration as the system level configuration // changes is always sent to all processes when they happen so it can just use whatever // system level configuration it last got. r.scheduleConfigurationChanged(taskConfig, true); r.stopFreezingScreenLocked(false); return true; } private int getTaskConfigurationChanges(ActivityRecord record, Configuration taskConfig, Configuration oldTaskOverride) { // If we went from full-screen to non-full-screen, make sure to use the correct // configuration task diff, so the diff stays as small as possible. if (Configuration.EMPTY.equals(oldTaskOverride) && !Configuration.EMPTY.equals(taskConfig)) { oldTaskOverride = record.task.extractOverrideConfig(record.configuration); } // Conversely, do the same when going the other direction. if (Configuration.EMPTY.equals(taskConfig) && !Configuration.EMPTY.equals(oldTaskOverride)) { taskConfig = record.task.extractOverrideConfig(record.configuration); } // Determine what has changed. May be nothing, if this is a config // that has come back from the app after going idle. In that case // we just want to leave the official config object now in the // activity and do nothing else. int taskChanges = oldTaskOverride.diff(taskConfig); // We don't want to use size changes if they don't cross boundaries that are important to // the app. if ((taskChanges & CONFIG_SCREEN_SIZE) != 0) { final boolean crosses = record.crossesHorizontalSizeThreshold( oldTaskOverride.screenWidthDp, taskConfig.screenWidthDp) || record.crossesVerticalSizeThreshold( oldTaskOverride.screenHeightDp, taskConfig.screenHeightDp); if (!crosses) { taskChanges &= ~CONFIG_SCREEN_SIZE; } } if ((taskChanges & CONFIG_SMALLEST_SCREEN_SIZE) != 0) { final int oldSmallest = oldTaskOverride.smallestScreenWidthDp; final int newSmallest = taskConfig.smallestScreenWidthDp; if (!record.crossesSmallestSizeThreshold(oldSmallest, newSmallest)) { taskChanges &= ~CONFIG_SMALLEST_SCREEN_SIZE; } } return catchConfigChangesFromUnset(taskConfig, oldTaskOverride, taskChanges); } private static int catchConfigChangesFromUnset(Configuration taskConfig, Configuration oldTaskOverride, int taskChanges) { if (taskChanges == 0) { // {@link Configuration#diff} doesn't catch changes from unset values. // Check for changes we care about. if (oldTaskOverride.orientation != taskConfig.orientation) { taskChanges |= CONFIG_ORIENTATION; } // We want to explicitly track situations where the size configuration goes from // undefined to defined. We don't care about crossing the threshold in that case, // because there is no threshold. final int oldHeight = oldTaskOverride.screenHeightDp; final int newHeight = taskConfig.screenHeightDp; final int undefinedHeight = Configuration.SCREEN_HEIGHT_DP_UNDEFINED; if ((oldHeight == undefinedHeight && newHeight != undefinedHeight) || (oldHeight != undefinedHeight && newHeight == undefinedHeight)) { taskChanges |= CONFIG_SCREEN_SIZE; } final int oldWidth = oldTaskOverride.screenWidthDp; final int newWidth = taskConfig.screenWidthDp; final int undefinedWidth = Configuration.SCREEN_WIDTH_DP_UNDEFINED; if ((oldWidth == undefinedWidth && newWidth != undefinedWidth) || (oldWidth != undefinedWidth && newWidth == undefinedWidth)) { taskChanges |= CONFIG_SCREEN_SIZE; } final int oldSmallest = oldTaskOverride.smallestScreenWidthDp; final int newSmallest = taskConfig.smallestScreenWidthDp; final int undefinedSmallest = Configuration.SMALLEST_SCREEN_WIDTH_DP_UNDEFINED; if ((oldSmallest == undefinedSmallest && newSmallest != undefinedSmallest) || (oldSmallest != undefinedSmallest && newSmallest == undefinedSmallest)) { taskChanges |= CONFIG_SMALLEST_SCREEN_SIZE; } final int oldLayout = oldTaskOverride.screenLayout; final int newLayout = taskConfig.screenLayout; if ((oldLayout == SCREENLAYOUT_UNDEFINED && newLayout != SCREENLAYOUT_UNDEFINED) || (oldLayout != SCREENLAYOUT_UNDEFINED && newLayout == SCREENLAYOUT_UNDEFINED)) { taskChanges |= CONFIG_SCREEN_LAYOUT; } } return taskChanges; } private static boolean isResizeOnlyChange(int change) { return (change & ~(CONFIG_SCREEN_SIZE | CONFIG_SMALLEST_SCREEN_SIZE | CONFIG_ORIENTATION | CONFIG_SCREEN_LAYOUT)) == 0; } private void relaunchActivityLocked( ActivityRecord r, int changes, boolean andResume, boolean preserveWindow) { if (mService.mSuppressResizeConfigChanges && preserveWindow) { r.configChangeFlags = 0; return; } List results = null; List newIntents = null; if (andResume) { results = r.results; newIntents = r.newIntents; } if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Relaunching: " + r + " with results=" + results + " newIntents=" + newIntents + " andResume=" + andResume + " preserveWindow=" + preserveWindow); EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), r.task.taskId, r.shortComponentName); r.startFreezingScreenLocked(r.app, 0); mStackSupervisor.removeChildActivityContainers(r); try { if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, "Moving to " + (andResume ? "RESUMED" : "PAUSED") + " Relaunching " + r + " callers=" + Debug.getCallers(6)); r.forceNewConfig = false; mStackSupervisor.activityRelaunchingLocked(r); r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, changes, !andResume, new Configuration(mService.mConfiguration), new Configuration(r.task.mOverrideConfig), preserveWindow); // Note: don't need to call pauseIfSleepingLocked() here, because // the caller will only pass in 'andResume' if this activity is // currently resumed, which implies we aren't sleeping. } catch (RemoteException e) { if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, "Relaunch failed", e); } if (andResume) { if (DEBUG_STATES) { Slog.d(TAG_STATES, "Resumed after relaunch " + r); } r.state = ActivityState.RESUMED; // Relaunch-resume could happen either when the app is already in the front, // or while it's being brought to front. In the latter case, it's marked RESUMED // but not yet visible (or stopped). We need to complete the resume here as the // code in resumeTopActivityInnerLocked to complete the resume might be skipped. if (!r.visible || r.stopped) { mWindowManager.setAppVisibility(r.appToken, true); completeResumeLocked(r); } else { r.results = null; r.newIntents = null; } mService.showUnsupportedZoomDialogIfNeededLocked(r); mService.showAskCompatModeDialogLocked(r); } else { mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); r.state = ActivityState.PAUSED; } r.configChangeFlags = 0; r.deferRelaunchUntilPaused = false; r.preserveWindowOnDeferredRelaunch = false; } boolean willActivityBeVisibleLocked(IBinder token) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if (r.appToken == token) { return true; } if (r.fullscreen && !r.finishing) { return false; } } } final ActivityRecord r = ActivityRecord.forTokenLocked(token); if (r == null) { return false; } if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," + " would have returned true for r=" + r); return !r.finishing; } void closeSystemDialogsLocked() { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); } } } } boolean finishDisabledPackageActivitiesLocked(String packageName, Set filterByClasses, boolean doit, boolean evenPersistent, int userId) { boolean didSomething = false; TaskRecord lastTask = null; ComponentName homeActivity = null; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; int numActivities = activities.size(); for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { ActivityRecord r = activities.get(activityNdx); final boolean sameComponent = (r.packageName.equals(packageName) && (filterByClasses == null || filterByClasses.contains(r.realActivity.getClassName()))) || (packageName == null && r.userId == userId); if ((userId == UserHandle.USER_ALL || r.userId == userId) && (sameComponent || r.task == lastTask) && (r.app == null || evenPersistent || !r.app.persistent)) { if (!doit) { if (r.finishing) { // If this activity is just finishing, then it is not // interesting as far as something to stop. continue; } return true; } if (r.isHomeActivity()) { if (homeActivity != null && homeActivity.equals(r.realActivity)) { Slog.i(TAG, "Skip force-stop again " + r); continue; } else { homeActivity = r.realActivity; } } didSomething = true; Slog.i(TAG, " Force finishing activity " + r); if (sameComponent) { if (r.app != null) { r.app.removed = true; } r.app = null; } lastTask = r.task; if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", true)) { // r has been deleted from mActivities, accommodate. --numActivities; --activityNdx; } } } } return didSomething; } void getTasksLocked(List list, int callingUid, boolean allowed) { boolean focusedStack = mStackSupervisor.getFocusedStack() == this; boolean topTask = true; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); if (task.getTopActivity() == null) { continue; } ActivityRecord r = null; ActivityRecord top = null; ActivityRecord tmp; int numActivities = 0; int numRunning = 0; final ArrayList activities = task.mActivities; if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { continue; } for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { tmp = activities.get(activityNdx); if (tmp.finishing) { continue; } r = tmp; // Initialize state for next task if needed. if (top == null || (top.state == ActivityState.INITIALIZING)) { top = r; numActivities = numRunning = 0; } // Add 'r' into the current task. numActivities++; if (r.app != null && r.app.thread != null) { numRunning++; } if (DEBUG_ALL) Slog.v( TAG, r.intent.getComponent().flattenToShortString() + ": task=" + r.task); } RunningTaskInfo ci = new RunningTaskInfo(); ci.id = task.taskId; ci.stackId = mStackId; ci.baseActivity = r.intent.getComponent(); ci.topActivity = top.intent.getComponent(); ci.lastActiveTime = task.lastActiveTime; if (focusedStack && topTask) { // Give the latest time to ensure foreground task can be sorted // at the first, because lastActiveTime of creating task is 0. ci.lastActiveTime = System.currentTimeMillis(); topTask = false; } if (top.task != null) { ci.description = top.task.lastDescription; } ci.numActivities = numActivities; ci.numRunning = numRunning; ci.isDockable = task.canGoInDockedStack(); ci.resizeMode = task.mResizeMode; list.add(ci); } } public void unhandledBackLocked() { final int top = mTaskHistory.size() - 1; if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Performing unhandledBack(): top activity at " + top); if (top >= 0) { final ArrayList activities = mTaskHistory.get(top).mActivities; int activityTop = activities.size() - 1; if (activityTop > 0) { finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, "unhandled-back", true); } } } /** * Reset local parameters because an app's activity died. * @param app The app of the activity that died. * @return result from removeHistoryRecordsForAppLocked. */ boolean handleAppDiedLocked(ProcessRecord app) { if (mPausingActivity != null && mPausingActivity.app == app) { if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG_PAUSE, "App died while pausing: " + mPausingActivity); mPausingActivity = null; } if (mLastPausedActivity != null && mLastPausedActivity.app == app) { mLastPausedActivity = null; mLastNoHistoryActivity = null; } return removeHistoryRecordsForAppLocked(app); } void handleAppCrashLocked(ProcessRecord app) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord r = activities.get(activityNdx); if (r.app == app) { Slog.w(TAG, " Force finishing activity " + r.intent.getComponent().flattenToShortString()); // Force the destroy to skip right to removal. r.app = null; finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); } } } } boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, boolean dumpClient, String dumpPackage, boolean needSep, String header) { boolean printed = false; for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final TaskRecord task = mTaskHistory.get(taskNdx); printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, dumpClient, dumpPackage, needSep, header, " Task id #" + task.taskId + "\n" + " mFullscreen=" + task.mFullscreen + "\n" + " mBounds=" + task.mBounds + "\n" + " mMinWidth=" + task.mMinWidth + "\n" + " mMinHeight=" + task.mMinHeight + "\n" + " mLastNonFullscreenBounds=" + task.mLastNonFullscreenBounds); if (printed) { header = null; } } return printed; } ArrayList getDumpActivitiesLocked(String name) { ArrayList activities = new ArrayList(); if ("all".equals(name)) { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { activities.addAll(mTaskHistory.get(taskNdx).mActivities); } } else if ("top".equals(name)) { final int top = mTaskHistory.size() - 1; if (top >= 0) { final ArrayList list = mTaskHistory.get(top).mActivities; int listTop = list.size() - 1; if (listTop >= 0) { activities.add(list.get(listTop)); } } } else { ItemMatcher matcher = new ItemMatcher(); matcher.build(name); for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { if (matcher.match(r1, r1.intent.getComponent())) { activities.add(r1); } } } } return activities; } ActivityRecord restartPackage(String packageName) { ActivityRecord starting = topRunningActivityLocked(); // All activities that came from the package must be // restarted as if there was a config change. for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { final ArrayList activities = mTaskHistory.get(taskNdx).mActivities; for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { final ActivityRecord a = activities.get(activityNdx); if (a.info.packageName.equals(packageName)) { a.forceNewConfig = true; if (starting != null && a == starting && a.visible) { a.startFreezingScreenLocked(starting.app, CONFIG_SCREEN_LAYOUT); } } } } return starting; } void removeTask(TaskRecord task, String reason) { removeTask(task, reason, REMOVE_TASK_MODE_DESTROYING); } /** * Removes the input task from this stack. * @param task to remove. * @param reason for removal. * @param mode task removal mode. Either {@link #REMOVE_TASK_MODE_DESTROYING}, * {@link #REMOVE_TASK_MODE_MOVING}, {@link #REMOVE_TASK_MODE_MOVING_TO_TOP}. */ void removeTask(TaskRecord task, String reason, int mode) { if (mode == REMOVE_TASK_MODE_DESTROYING) { mStackSupervisor.removeLockedTaskLocked(task); mWindowManager.removeTask(task.taskId); if (!StackId.persistTaskBounds(mStackId)) { // Reset current bounds for task whose bounds shouldn't be persisted so it uses // default configuration the next time it launches. task.updateOverrideConfiguration(null); } } final ActivityRecord r = mResumedActivity; if (r != null && r.task == task) { mResumedActivity = null; } final int taskNdx = mTaskHistory.indexOf(task); final int topTaskNdx = mTaskHistory.size() - 1; if (task.isOverHomeStack() && taskNdx < topTaskNdx) { final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); if (!nextTask.isOverHomeStack()) { nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); } } mTaskHistory.remove(task); updateTaskMovement(task, true); if (mode == REMOVE_TASK_MODE_DESTROYING && task.mActivities.isEmpty()) { // TODO: VI what about activity? final boolean isVoiceSession = task.voiceSession != null; if (isVoiceSession) { try { task.voiceSession.taskFinished(task.intent, task.taskId); } catch (RemoteException e) { } } if (task.autoRemoveFromRecents() || isVoiceSession) { // Task creator asked to remove this when done, or this task was a voice // interaction, so it should not remain on the recent tasks list. mRecentTasks.remove(task); task.removedFromRecents(); } } if (mTaskHistory.isEmpty()) { if (DEBUG_STACK) Slog.i(TAG_STACK, "removeTask: removing stack=" + this); // We only need to adjust focused stack if this stack is in focus and we are not in the // process of moving the task to the top of the stack that will be focused. if (isOnHomeDisplay() && mode != REMOVE_TASK_MODE_MOVING_TO_TOP && mStackSupervisor.isFocusedStack(this)) { String myReason = reason + " leftTaskHistoryEmpty"; if (mFullscreen || !adjustFocusToNextFocusableStackLocked( task.getTaskToReturnTo(), myReason)) { mStackSupervisor.moveHomeStackToFront(myReason); } } if (mStacks != null) { mStacks.remove(this); mStacks.add(0, this); } if (!isHomeStack()) { mActivityContainer.onTaskListEmptyLocked(); } } task.stack = null; } TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, boolean toTop) { TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, voiceInteractor); // add the task to stack first, mTaskPositioner might need the stack association addTask(task, toTop, "createTaskRecord"); final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN; if (!layoutTaskInStack(task, info.windowLayout) && mBounds != null && task.isResizeable() && !isLockscreenShown) { task.updateOverrideConfiguration(mBounds); } return task; } boolean layoutTaskInStack(TaskRecord task, ActivityInfo.WindowLayout windowLayout) { if (mTaskPositioner == null) { return false; } mTaskPositioner.updateDefaultBounds(task, mTaskHistory, windowLayout); return true; } ArrayList getAllTasks() { return new ArrayList<>(mTaskHistory); } void addTask(final TaskRecord task, final boolean toTop, String reason) { final ActivityStack prevStack = preAddTask(task, reason, toTop); task.stack = this; if (toTop) { insertTaskAtTop(task, null); } else { mTaskHistory.add(0, task); updateTaskMovement(task, false); } postAddTask(task, prevStack); } void positionTask(final TaskRecord task, int position) { final ActivityRecord topRunningActivity = task.topRunningActivityLocked(); final boolean wasResumed = topRunningActivity == task.stack.mResumedActivity; final ActivityStack prevStack = preAddTask(task, "positionTask", !ON_TOP); task.stack = this; insertTaskAtPosition(task, position); postAddTask(task, prevStack); if (wasResumed) { if (mResumedActivity != null) { Log.wtf(TAG, "mResumedActivity was already set when moving mResumedActivity from" + " other stack to this stack mResumedActivity=" + mResumedActivity + " other mResumedActivity=" + topRunningActivity); } mResumedActivity = topRunningActivity; } } private ActivityStack preAddTask(TaskRecord task, String reason, boolean toTop) { final ActivityStack prevStack = task.stack; if (prevStack != null && prevStack != this) { prevStack.removeTask(task, reason, toTop ? REMOVE_TASK_MODE_MOVING_TO_TOP : REMOVE_TASK_MODE_MOVING); } return prevStack; } private void postAddTask(TaskRecord task, ActivityStack prevStack) { if (prevStack != null) { mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack); } else if (task.voiceSession != null) { try { task.voiceSession.taskStarted(task.intent, task.taskId); } catch (RemoteException e) { } } } void addConfigOverride(ActivityRecord r, TaskRecord task) { final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds(); // TODO: VI deal with activity mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) != 0, r.userId, r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind, bounds, task.mOverrideConfig, task.mResizeMode, r.isAlwaysFocusable(), task.isHomeTask(), r.appInfo.targetSdkVersion); r.taskConfigOverride = task.mOverrideConfig; } void moveToFrontAndResumeStateIfNeeded( ActivityRecord r, boolean moveToFront, boolean setResume, String reason) { if (!moveToFront) { return; } // If the activity owns the last resumed activity, transfer that together, // so that we don't resume the same activity again in the new stack. // Apps may depend on onResume()/onPause() being called in pairs. if (setResume) { mResumedActivity = r; } // Move the stack in which we are placing the activity to the front. The call will also // make sure the activity focus is set. moveToFront(reason); } /** * Moves the input activity from its current stack to this one. * NOTE: The current task of the activity isn't moved to this stack. Instead a new task is * created on this stack which the activity is added to. * */ void moveActivityToStack(ActivityRecord r) { final ActivityStack prevStack = r.task.stack; if (prevStack.mStackId == mStackId) { // You are already in the right stack silly... return; } final boolean wasFocused = mStackSupervisor.isFocusedStack(prevStack) && (mStackSupervisor.topRunningActivityLocked() == r); final boolean wasResumed = wasFocused && (prevStack.mResumedActivity == r); final TaskRecord task = createTaskRecord( mStackSupervisor.getNextTaskIdForUserLocked(r.userId), r.info, r.intent, null, null, true); r.setTask(task, null); task.addActivityToTop(r); setAppTask(r, task); mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack); moveToFrontAndResumeStateIfNeeded(r, wasFocused, wasResumed, "moveActivityToStack"); if (wasResumed) { prevStack.mResumedActivity = null; } } private void setAppTask(ActivityRecord r, TaskRecord task) { final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds(); mWindowManager.setAppTask(r.appToken, task.taskId, mStackId, bounds, task.mOverrideConfig, task.mResizeMode, task.isHomeTask()); r.taskConfigOverride = task.mOverrideConfig; } public int getStackId() { return mStackId; } @Override public String toString() { return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; } void onLockTaskPackagesUpdatedLocked() { for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { mTaskHistory.get(taskNdx).setLockTaskAuth(); } } }