/* * Copyright (C) 2015 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.systemui.recents; import static android.app.ActivityManager.StackId.FREEFORM_WORKSPACE_STACK_ID; import static android.app.ActivityManager.StackId.INVALID_STACK_ID; import static android.app.ActivityManager.StackId.isHomeOrRecentsStack; import static android.view.View.MeasureSpec; import android.app.ActivityManager; import android.app.ActivityManager.TaskSnapshot; import android.app.ActivityOptions; import android.content.ActivityNotFoundException; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.GraphicBuffer; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.drawable.Drawable; import android.os.Handler; import android.os.SystemClock; import android.util.Log; import android.util.MutableBoolean; import android.util.Pair; import android.view.AppTransitionAnimationSpec; import android.view.LayoutInflater; import android.view.ViewConfiguration; import android.view.WindowManager; import android.widget.Toast; import com.google.android.collect.Lists; import com.android.internal.logging.MetricsLogger; import com.android.internal.policy.DockedDividerUtils; import com.android.systemui.R; import com.android.systemui.SystemUIApplication; import com.android.systemui.recents.events.EventBus; import com.android.systemui.recents.events.activity.DockedTopTaskEvent; import com.android.systemui.recents.events.activity.EnterRecentsWindowLastAnimationFrameEvent; import com.android.systemui.recents.events.activity.HideRecentsEvent; import com.android.systemui.recents.events.activity.IterateRecentsEvent; import com.android.systemui.recents.events.activity.LaunchMostRecentTaskRequestEvent; import com.android.systemui.recents.events.activity.LaunchNextTaskRequestEvent; import com.android.systemui.recents.events.activity.RecentsActivityStartingEvent; import com.android.systemui.recents.events.activity.ToggleRecentsEvent; import com.android.systemui.recents.events.component.ActivityPinnedEvent; import com.android.systemui.recents.events.component.ActivityUnpinnedEvent; import com.android.systemui.recents.events.component.HidePipMenuEvent; import com.android.systemui.recents.events.component.RecentsVisibilityChangedEvent; import com.android.systemui.recents.events.component.ScreenPinningRequestEvent; import com.android.systemui.recents.events.ui.DraggingInRecentsEndedEvent; import com.android.systemui.recents.events.ui.DraggingInRecentsEvent; import com.android.systemui.recents.events.ui.TaskSnapshotChangedEvent; import com.android.systemui.recents.misc.DozeTrigger; import com.android.systemui.recents.misc.ForegroundThread; import com.android.systemui.recents.misc.SystemServicesProxy; import com.android.systemui.recents.misc.SystemServicesProxy.TaskStackListener; import com.android.systemui.recents.model.RecentsTaskLoadPlan; import com.android.systemui.recents.model.RecentsTaskLoader; import com.android.systemui.recents.model.Task; import com.android.systemui.recents.model.TaskGrouping; import com.android.systemui.recents.model.TaskStack; import com.android.systemui.recents.model.ThumbnailData; import com.android.systemui.recents.views.RecentsTransitionHelper; import com.android.systemui.recents.views.RecentsTransitionHelper.AppTransitionAnimationSpecsFuture; import com.android.systemui.recents.views.TaskStackLayoutAlgorithm; import com.android.systemui.recents.views.TaskStackLayoutAlgorithm.VisibilityReport; import com.android.systemui.recents.views.TaskStackView; import com.android.systemui.recents.views.TaskStackViewScroller; import com.android.systemui.recents.views.TaskViewHeader; import com.android.systemui.recents.views.TaskViewTransform; import com.android.systemui.recents.views.grid.TaskGridLayoutAlgorithm; import com.android.systemui.stackdivider.DividerView; import com.android.systemui.statusbar.phone.NavigationBarGestureHelper; import com.android.systemui.statusbar.phone.StatusBar; import java.util.ArrayList; /** * An implementation of the Recents component for the current user. For secondary users, this can * be called remotely from the system user. */ public class RecentsImpl implements ActivityOptions.OnAnimationFinishedListener { private final static String TAG = "RecentsImpl"; // The minimum amount of time between each recents button press that we will handle private final static int MIN_TOGGLE_DELAY_MS = 350; // The duration within which the user releasing the alt tab (from when they pressed alt tab) // that the fast alt-tab animation will run. If the user's alt-tab takes longer than this // duration, then we will toggle recents after this duration. private final static int FAST_ALT_TAB_DELAY_MS = 225; public final static String RECENTS_PACKAGE = "com.android.systemui"; public final static String RECENTS_ACTIVITY = "com.android.systemui.recents.RecentsActivity"; /** * An implementation of TaskStackListener, that allows us to listen for changes to the system * task stacks and update recents accordingly. */ class TaskStackListenerImpl extends TaskStackListener { @Override public void onTaskStackChangedBackground() { // Check this is for the right user if (!checkCurrentUserId(mContext, false /* debug */)) { return; } // Preloads the next task RecentsConfiguration config = Recents.getConfiguration(); if (config.svelteLevel == RecentsConfiguration.SVELTE_NONE) { // Load the next task only if we aren't svelte SystemServicesProxy ssp = Recents.getSystemServices(); ActivityManager.RunningTaskInfo runningTaskInfo = ssp.getRunningTask(); RecentsTaskLoader loader = Recents.getTaskLoader(); RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext); loader.preloadTasks(plan, -1, false /* includeFrontMostExcludedTask */); // This callback is made when a new activity is launched and the old one is paused // so ignore the current activity and try and preload the thumbnail for the // previous one. VisibilityReport visibilityReport; synchronized (mDummyStackView) { mDummyStackView.getStack().removeAllTasks(false /* notifyStackChanges */); mDummyStackView.setTasks(plan.getTaskStack(), false /* allowNotify */); updateDummyStackViewLayout(plan.getTaskStack(), getWindowRect(null /* windowRectOverride */)); // Launched from app is always the worst case (in terms of how many // thumbnails/tasks visible) RecentsActivityLaunchState launchState = new RecentsActivityLaunchState(); launchState.launchedFromApp = true; mDummyStackView.updateLayoutAlgorithm(true /* boundScroll */, launchState); visibilityReport = mDummyStackView.computeStackVisibilityReport(); } RecentsTaskLoadPlan.Options launchOpts = new RecentsTaskLoadPlan.Options(); launchOpts.runningTaskId = runningTaskInfo != null ? runningTaskInfo.id : -1; launchOpts.numVisibleTasks = visibilityReport.numVisibleTasks; launchOpts.numVisibleTaskThumbnails = visibilityReport.numVisibleThumbnails; launchOpts.onlyLoadForCache = true; launchOpts.onlyLoadPausedActivities = true; launchOpts.loadThumbnails = true; loader.loadTasks(mContext, plan, launchOpts); } } @Override public void onActivityPinned(String packageName, int taskId) { // Check this is for the right user if (!checkCurrentUserId(mContext, false /* debug */)) { return; } // This time needs to be fetched the same way the last active time is fetched in // {@link TaskRecord#touchActiveTime} Recents.getConfiguration().getLaunchState().launchedFromPipApp = true; Recents.getConfiguration().getLaunchState().launchedWithNextPipApp = false; EventBus.getDefault().send(new ActivityPinnedEvent(taskId)); consumeInstanceLoadPlan(); sLastPipTime = System.currentTimeMillis(); } @Override public void onActivityUnpinned() { // Check this is for the right user if (!checkCurrentUserId(mContext, false /* debug */)) { return; } EventBus.getDefault().send(new ActivityUnpinnedEvent()); sLastPipTime = -1; } @Override public void onTaskSnapshotChanged(int taskId, TaskSnapshot snapshot) { // Check this is for the right user if (!checkCurrentUserId(mContext, false /* debug */)) { return; } EventBus.getDefault().send(new TaskSnapshotChangedEvent(taskId, ThumbnailData.createFromTaskSnapshot(snapshot))); } } protected static RecentsTaskLoadPlan sInstanceLoadPlan; // Stores the last pinned task time protected static long sLastPipTime = -1; protected Context mContext; protected Handler mHandler; TaskStackListenerImpl mTaskStackListener; boolean mDraggingInRecents; boolean mLaunchedWhileDocking; // Task launching Rect mTaskStackBounds = new Rect(); TaskViewTransform mTmpTransform = new TaskViewTransform(); int mStatusBarHeight; int mNavBarHeight; int mNavBarWidth; int mTaskBarHeight; // Header (for transition) TaskViewHeader mHeaderBar; final Object mHeaderBarLock = new Object(); protected TaskStackView mDummyStackView; // Variables to keep track of if we need to start recents after binding protected boolean mTriggeredFromAltTab; protected long mLastToggleTime; DozeTrigger mFastAltTabTrigger = new DozeTrigger(FAST_ALT_TAB_DELAY_MS, new Runnable() { @Override public void run() { // When this fires, then the user has not released alt-tab for at least // FAST_ALT_TAB_DELAY_MS milliseconds showRecents(mTriggeredFromAltTab, false /* draggingInRecents */, true /* animate */, false /* reloadTasks */, false /* fromHome */, DividerView.INVALID_RECENTS_GROW_TARGET); } }); public RecentsImpl(Context context) { mContext = context; mHandler = new Handler(); // Initialize the static foreground thread ForegroundThread.get(); // Register the task stack listener mTaskStackListener = new TaskStackListenerImpl(); SystemServicesProxy ssp = Recents.getSystemServices(); ssp.registerTaskStackListener(mTaskStackListener); // Initialize the static configuration resources mDummyStackView = new TaskStackView(mContext); reloadResources(); } public void onBootCompleted() { // When we start, preload the data associated with the previous recent tasks. // We can use a new plan since the caches will be the same. RecentsTaskLoader loader = Recents.getTaskLoader(); RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext); loader.preloadTasks(plan, -1, false /* includeFrontMostExcludedTask */); RecentsTaskLoadPlan.Options launchOpts = new RecentsTaskLoadPlan.Options(); launchOpts.numVisibleTasks = loader.getIconCacheSize(); launchOpts.numVisibleTaskThumbnails = loader.getThumbnailCacheSize(); launchOpts.onlyLoadForCache = true; loader.loadTasks(mContext, plan, launchOpts); } public void onConfigurationChanged() { reloadResources(); synchronized (mDummyStackView) { mDummyStackView.reloadOnConfigurationChange(); } } /** * This is only called from the system user's Recents. Secondary users will instead proxy their * visibility change events through to the system user via * {@link Recents#onBusEvent(RecentsVisibilityChangedEvent)}. */ public void onVisibilityChanged(Context context, boolean visible) { Recents.getSystemServices().setRecentsVisibility(visible); } /** * This is only called from the system user's Recents. Secondary users will instead proxy their * visibility change events through to the system user via * {@link Recents#onBusEvent(ScreenPinningRequestEvent)}. */ public void onStartScreenPinning(Context context, int taskId) { SystemUIApplication app = (SystemUIApplication) context; StatusBar statusBar = app.getComponent(StatusBar.class); if (statusBar != null) { statusBar.showScreenPinningRequest(taskId, false); } } public void showRecents(boolean triggeredFromAltTab, boolean draggingInRecents, boolean animate, boolean launchedWhileDockingTask, boolean fromHome, int growTarget) { mTriggeredFromAltTab = triggeredFromAltTab; mDraggingInRecents = draggingInRecents; mLaunchedWhileDocking = launchedWhileDockingTask; if (mFastAltTabTrigger.isAsleep()) { // Fast alt-tab duration has elapsed, fall through to showing Recents and reset mFastAltTabTrigger.stopDozing(); } else if (mFastAltTabTrigger.isDozing()) { // Fast alt-tab duration has not elapsed. If this is triggered by a different // showRecents() call, then ignore that call for now. // TODO: We can not handle quick tabs that happen between the initial showRecents() call // that started the activity and the activity starting up. The severity of this // is inversely proportional to the FAST_ALT_TAB_DELAY_MS duration though. if (!triggeredFromAltTab) { return; } mFastAltTabTrigger.stopDozing(); } else if (triggeredFromAltTab) { // The fast alt-tab detector is not yet running, so start the trigger and wait for the // hideRecents() call, or for the fast alt-tab duration to elapse mFastAltTabTrigger.startDozing(); return; } try { // Check if the top task is in the home stack, and start the recents activity SystemServicesProxy ssp = Recents.getSystemServices(); boolean forceVisible = launchedWhileDockingTask || draggingInRecents; MutableBoolean isHomeStackVisible = new MutableBoolean(forceVisible); if (forceVisible || !ssp.isRecentsActivityVisible(isHomeStackVisible)) { ActivityManager.RunningTaskInfo runningTask = ssp.getRunningTask(); startRecentsActivity(runningTask, isHomeStackVisible.value || fromHome, animate, growTarget); } } catch (ActivityNotFoundException e) { Log.e(TAG, "Failed to launch RecentsActivity", e); } } public void hideRecents(boolean triggeredFromAltTab, boolean triggeredFromHomeKey) { if (triggeredFromAltTab && mFastAltTabTrigger.isDozing()) { // The user has released alt-tab before the trigger has run, so just show the next // task immediately showNextTask(); // Cancel the fast alt-tab trigger mFastAltTabTrigger.stopDozing(); return; } // Defer to the activity to handle hiding recents, if it handles it, then it must still // be visible EventBus.getDefault().post(new HideRecentsEvent(triggeredFromAltTab, triggeredFromHomeKey)); } public void toggleRecents(int growTarget) { // Skip this toggle if we are already waiting to trigger recents via alt-tab if (mFastAltTabTrigger.isDozing()) { return; } mDraggingInRecents = false; mLaunchedWhileDocking = false; mTriggeredFromAltTab = false; try { SystemServicesProxy ssp = Recents.getSystemServices(); MutableBoolean isHomeStackVisible = new MutableBoolean(true); long elapsedTime = SystemClock.elapsedRealtime() - mLastToggleTime; if (ssp.isRecentsActivityVisible(isHomeStackVisible)) { RecentsDebugFlags debugFlags = Recents.getDebugFlags(); RecentsConfiguration config = Recents.getConfiguration(); RecentsActivityLaunchState launchState = config.getLaunchState(); if (!launchState.launchedWithAltTab) { // Has the user tapped quickly? boolean isQuickTap = elapsedTime < ViewConfiguration.getDoubleTapTimeout(); if (Recents.getConfiguration().isGridEnabled) { if (isQuickTap) { EventBus.getDefault().post(new LaunchNextTaskRequestEvent()); } else { EventBus.getDefault().post(new LaunchMostRecentTaskRequestEvent()); } } else { if (!debugFlags.isPagingEnabled() || isQuickTap) { // Launch the next focused task EventBus.getDefault().post(new LaunchNextTaskRequestEvent()); } else { // Notify recents to move onto the next task EventBus.getDefault().post(new IterateRecentsEvent()); } } } else { // If the user has toggled it too quickly, then just eat up the event here (it's // better than showing a janky screenshot). // NOTE: Ideally, the screenshot mechanism would take the window transform into // account if (elapsedTime < MIN_TOGGLE_DELAY_MS) { return; } EventBus.getDefault().post(new ToggleRecentsEvent()); mLastToggleTime = SystemClock.elapsedRealtime(); } return; } else { // If the user has toggled it too quickly, then just eat up the event here (it's // better than showing a janky screenshot). // NOTE: Ideally, the screenshot mechanism would take the window transform into // account if (elapsedTime < MIN_TOGGLE_DELAY_MS) { return; } // Otherwise, start the recents activity ActivityManager.RunningTaskInfo runningTask = ssp.getRunningTask(); startRecentsActivity(runningTask, isHomeStackVisible.value, true /* animate */, growTarget); // Only close the other system windows if we are actually showing recents ssp.sendCloseSystemWindows(StatusBar.SYSTEM_DIALOG_REASON_RECENT_APPS); mLastToggleTime = SystemClock.elapsedRealtime(); } } catch (ActivityNotFoundException e) { Log.e(TAG, "Failed to launch RecentsActivity", e); } } public void preloadRecents() { // Preload only the raw task list into a new load plan (which will be consumed by the // RecentsActivity) only if there is a task to animate to. Post this to ensure that we // don't block the touch feedback on the nav bar button which triggers this. mHandler.post(() -> { SystemServicesProxy ssp = Recents.getSystemServices(); MutableBoolean isHomeStackVisible = new MutableBoolean(true); if (!ssp.isRecentsActivityVisible(isHomeStackVisible)) { ActivityManager.RunningTaskInfo runningTask = ssp.getRunningTask(); if (runningTask == null) { return; } RecentsTaskLoader loader = Recents.getTaskLoader(); sInstanceLoadPlan = loader.createLoadPlan(mContext); loader.preloadTasks(sInstanceLoadPlan, runningTask.id, !isHomeStackVisible.value); TaskStack stack = sInstanceLoadPlan.getTaskStack(); if (stack.getTaskCount() > 0) { // Only preload the icon (but not the thumbnail since it may not have been taken // for the pausing activity) preloadIcon(runningTask.id); // At this point, we don't know anything about the stack state. So only // calculate the dimensions of the thumbnail that we need for the transition // into Recents, but do not draw it until we construct the activity options when // we start Recents updateHeaderBarLayout(stack, null /* window rect override*/); } } }); } public void cancelPreloadingRecents() { // Do nothing } public void onDraggingInRecents(float distanceFromTop) { EventBus.getDefault().sendOntoMainThread(new DraggingInRecentsEvent(distanceFromTop)); } public void onDraggingInRecentsEnded(float velocity) { EventBus.getDefault().sendOntoMainThread(new DraggingInRecentsEndedEvent(velocity)); } public void onShowCurrentUserToast(int msgResId, int msgLength) { Toast.makeText(mContext, msgResId, msgLength).show(); } /** * Transitions to the next recent task in the stack. */ public void showNextTask() { SystemServicesProxy ssp = Recents.getSystemServices(); RecentsTaskLoader loader = Recents.getTaskLoader(); RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext); loader.preloadTasks(plan, -1, false /* includeFrontMostExcludedTask */); TaskStack focusedStack = plan.getTaskStack(); // Return early if there are no tasks in the focused stack if (focusedStack == null || focusedStack.getTaskCount() == 0) return; // Return early if there is no running task ActivityManager.RunningTaskInfo runningTask = ssp.getRunningTask(); if (runningTask == null) return; // Find the task in the recents list boolean isRunningTaskInHomeStack = SystemServicesProxy.isHomeStack(runningTask.stackId); ArrayList tasks = focusedStack.getStackTasks(); Task toTask = null; ActivityOptions launchOpts = null; int taskCount = tasks.size(); for (int i = taskCount - 1; i >= 1; i--) { Task task = tasks.get(i); if (isRunningTaskInHomeStack) { toTask = tasks.get(i - 1); launchOpts = ActivityOptions.makeCustomAnimation(mContext, R.anim.recents_launch_next_affiliated_task_target, R.anim.recents_fast_toggle_app_home_exit); break; } else if (task.key.id == runningTask.id) { toTask = tasks.get(i - 1); launchOpts = ActivityOptions.makeCustomAnimation(mContext, R.anim.recents_launch_prev_affiliated_task_target, R.anim.recents_launch_prev_affiliated_task_source); break; } } // Return early if there is no next task if (toTask == null) { ssp.startInPlaceAnimationOnFrontMostApplication( ActivityOptions.makeCustomInPlaceAnimation(mContext, R.anim.recents_launch_prev_affiliated_task_bounce)); return; } // Launch the task ssp.startActivityFromRecents( mContext, toTask.key, toTask.title, launchOpts, INVALID_STACK_ID, null /* resultListener */); } /** * Transitions to the next affiliated task. */ public void showRelativeAffiliatedTask(boolean showNextTask) { SystemServicesProxy ssp = Recents.getSystemServices(); RecentsTaskLoader loader = Recents.getTaskLoader(); RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext); loader.preloadTasks(plan, -1, false /* includeFrontMostExcludedTask */); TaskStack focusedStack = plan.getTaskStack(); // Return early if there are no tasks in the focused stack if (focusedStack == null || focusedStack.getTaskCount() == 0) return; // Return early if there is no running task (can't determine affiliated tasks in this case) ActivityManager.RunningTaskInfo runningTask = ssp.getRunningTask(); if (runningTask == null) return; // Return early if the running task is in the home/recents stack (optimization) if (isHomeOrRecentsStack(runningTask.stackId)) return; // Find the task in the recents list ArrayList tasks = focusedStack.getStackTasks(); Task toTask = null; ActivityOptions launchOpts = null; int taskCount = tasks.size(); int numAffiliatedTasks = 0; for (int i = 0; i < taskCount; i++) { Task task = tasks.get(i); if (task.key.id == runningTask.id) { TaskGrouping group = task.group; Task.TaskKey toTaskKey; if (showNextTask) { toTaskKey = group.getNextTaskInGroup(task); launchOpts = ActivityOptions.makeCustomAnimation(mContext, R.anim.recents_launch_next_affiliated_task_target, R.anim.recents_launch_next_affiliated_task_source); } else { toTaskKey = group.getPrevTaskInGroup(task); launchOpts = ActivityOptions.makeCustomAnimation(mContext, R.anim.recents_launch_prev_affiliated_task_target, R.anim.recents_launch_prev_affiliated_task_source); } if (toTaskKey != null) { toTask = focusedStack.findTaskWithId(toTaskKey.id); } numAffiliatedTasks = group.getTaskCount(); break; } } // Return early if there is no next task if (toTask == null) { if (numAffiliatedTasks > 1) { if (showNextTask) { ssp.startInPlaceAnimationOnFrontMostApplication( ActivityOptions.makeCustomInPlaceAnimation(mContext, R.anim.recents_launch_next_affiliated_task_bounce)); } else { ssp.startInPlaceAnimationOnFrontMostApplication( ActivityOptions.makeCustomInPlaceAnimation(mContext, R.anim.recents_launch_prev_affiliated_task_bounce)); } } return; } // Keep track of actually launched affiliated tasks MetricsLogger.count(mContext, "overview_affiliated_task_launch", 1); // Launch the task ssp.startActivityFromRecents( mContext, toTask.key, toTask.title, launchOpts, INVALID_STACK_ID, null /* resultListener */); } public void showNextAffiliatedTask() { // Keep track of when the affiliated task is triggered MetricsLogger.count(mContext, "overview_affiliated_task_next", 1); showRelativeAffiliatedTask(true); } public void showPrevAffiliatedTask() { // Keep track of when the affiliated task is triggered MetricsLogger.count(mContext, "overview_affiliated_task_prev", 1); showRelativeAffiliatedTask(false); } public void dockTopTask(int topTaskId, int dragMode, int stackCreateMode, Rect initialBounds) { SystemServicesProxy ssp = Recents.getSystemServices(); // Make sure we inform DividerView before we actually start the activity so we can change // the resize mode already. if (ssp.moveTaskToDockedStack(topTaskId, stackCreateMode, initialBounds)) { EventBus.getDefault().send(new DockedTopTaskEvent(dragMode, initialBounds)); showRecents( false /* triggeredFromAltTab */, dragMode == NavigationBarGestureHelper.DRAG_MODE_RECENTS, false /* animate */, true /* launchedWhileDockingTask*/, false /* fromHome */, DividerView.INVALID_RECENTS_GROW_TARGET); } } /** * Returns the preloaded load plan and invalidates it. */ public static RecentsTaskLoadPlan consumeInstanceLoadPlan() { RecentsTaskLoadPlan plan = sInstanceLoadPlan; sInstanceLoadPlan = null; return plan; } /** * @return the time at which a task last entered picture-in-picture. */ public static long getLastPipTime() { return sLastPipTime; } /** * Clears the time at which a task last entered picture-in-picture. */ public static void clearLastPipTime() { sLastPipTime = -1; } /** * Reloads all the resources for the current configuration. */ private void reloadResources() { Resources res = mContext.getResources(); mStatusBarHeight = res.getDimensionPixelSize( com.android.internal.R.dimen.status_bar_height); mNavBarHeight = res.getDimensionPixelSize( com.android.internal.R.dimen.navigation_bar_height); mNavBarWidth = res.getDimensionPixelSize( com.android.internal.R.dimen.navigation_bar_width); mTaskBarHeight = TaskStackLayoutAlgorithm.getDimensionForDevice(mContext, R.dimen.recents_task_view_header_height, R.dimen.recents_task_view_header_height, R.dimen.recents_task_view_header_height, R.dimen.recents_task_view_header_height_tablet_land, R.dimen.recents_task_view_header_height, R.dimen.recents_task_view_header_height_tablet_land, R.dimen.recents_grid_task_view_header_height); LayoutInflater inflater = LayoutInflater.from(mContext); mHeaderBar = (TaskViewHeader) inflater.inflate(R.layout.recents_task_view_header, null, false); mHeaderBar.setLayoutDirection(res.getConfiguration().getLayoutDirection()); } private void updateDummyStackViewLayout(TaskStack stack, Rect windowRect) { SystemServicesProxy ssp = Recents.getSystemServices(); Rect displayRect = ssp.getDisplayRect(); Rect systemInsets = new Rect(); ssp.getStableInsets(systemInsets); // When docked, the nav bar insets are consumed and the activity is measured without insets. // However, the window bounds include the insets, so we need to subtract them here to make // them identical. if (ssp.hasDockedTask()) { windowRect.bottom -= systemInsets.bottom; systemInsets.bottom = 0; } calculateWindowStableInsets(systemInsets, windowRect, displayRect); windowRect.offsetTo(0, 0); synchronized (mDummyStackView) { TaskStackLayoutAlgorithm stackLayout = mDummyStackView.getStackAlgorithm(); // Rebind the header bar and draw it for the transition stackLayout.setSystemInsets(systemInsets); if (stack != null) { stackLayout.getTaskStackBounds(displayRect, windowRect, systemInsets.top, systemInsets.left, systemInsets.right, mTaskStackBounds); stackLayout.reset(); stackLayout.initialize(displayRect, windowRect, mTaskStackBounds, TaskStackLayoutAlgorithm.StackState.getStackStateForStack(stack)); } } } private Rect getWindowRect(Rect windowRectOverride) { return windowRectOverride != null ? new Rect(windowRectOverride) : Recents.getSystemServices().getWindowRect(); } /** * Prepares the header bar layout for the next transition, if the task view bounds has changed * since the last call, it will attempt to re-measure and layout the header bar to the new size. * * @param stack the stack to initialize the stack layout with * @param windowRectOverride the rectangle to use when calculating the stack state which can * be different from the current window rect if recents is resizing * while being launched */ private void updateHeaderBarLayout(TaskStack stack, Rect windowRectOverride) { Rect windowRect = getWindowRect(windowRectOverride); int taskViewWidth = 0; boolean useGridLayout = false; synchronized (mDummyStackView) { useGridLayout = mDummyStackView.useGridLayout(); updateDummyStackViewLayout(stack, windowRect); if (stack != null) { TaskStackLayoutAlgorithm stackLayout = mDummyStackView.getStackAlgorithm(); mDummyStackView.getStack().removeAllTasks(false /* notifyStackChanges */); mDummyStackView.setTasks(stack, false /* allowNotifyStackChanges */); // Get the width of a task view so that we know how wide to draw the header bar. if (useGridLayout) { TaskGridLayoutAlgorithm gridLayout = mDummyStackView.getGridAlgorithm(); gridLayout.initialize(windowRect); taskViewWidth = (int) gridLayout.getTransform(0 /* taskIndex */, stack.getTaskCount(), new TaskViewTransform(), stackLayout).rect.width(); } else { Rect taskViewBounds = stackLayout.getUntransformedTaskViewBounds(); if (!taskViewBounds.isEmpty()) { taskViewWidth = taskViewBounds.width(); } } } } if (stack != null && taskViewWidth > 0) { synchronized (mHeaderBarLock) { if (mHeaderBar.getMeasuredWidth() != taskViewWidth || mHeaderBar.getMeasuredHeight() != mTaskBarHeight) { if (useGridLayout) { mHeaderBar.setShouldDarkenBackgroundColor(true); mHeaderBar.setNoUserInteractionState(); } mHeaderBar.forceLayout(); mHeaderBar.measure( MeasureSpec.makeMeasureSpec(taskViewWidth, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(mTaskBarHeight, MeasureSpec.EXACTLY)); } mHeaderBar.layout(0, 0, taskViewWidth, mTaskBarHeight); } } } /** * Given the stable insets and the rect for our window, calculates the insets that affect our * window. */ private void calculateWindowStableInsets(Rect inOutInsets, Rect windowRect, Rect displayRect) { // Display rect without insets - available app space Rect appRect = new Rect(displayRect); appRect.inset(inOutInsets); // Our window intersected with available app space Rect windowRectWithInsets = new Rect(windowRect); windowRectWithInsets.intersect(appRect); inOutInsets.left = windowRectWithInsets.left - windowRect.left; inOutInsets.top = windowRectWithInsets.top - windowRect.top; inOutInsets.right = windowRect.right - windowRectWithInsets.right; inOutInsets.bottom = windowRect.bottom - windowRectWithInsets.bottom; } /** * Preloads the icon of a task. */ private void preloadIcon(int runningTaskId) { // Ensure that we load the running task's icon RecentsTaskLoadPlan.Options launchOpts = new RecentsTaskLoadPlan.Options(); launchOpts.runningTaskId = runningTaskId; launchOpts.loadThumbnails = false; launchOpts.onlyLoadForCache = true; Recents.getTaskLoader().loadTasks(mContext, sInstanceLoadPlan, launchOpts); } /** * Creates the activity options for a unknown state->recents transition. */ protected ActivityOptions getUnknownTransitionActivityOptions() { return ActivityOptions.makeCustomAnimation(mContext, R.anim.recents_from_unknown_enter, R.anim.recents_from_unknown_exit, mHandler, null); } /** * Creates the activity options for a home->recents transition. */ protected ActivityOptions getHomeTransitionActivityOptions() { return ActivityOptions.makeCustomAnimation(mContext, R.anim.recents_from_launcher_enter, R.anim.recents_from_launcher_exit, mHandler, null); } /** * Creates the activity options for an app->recents transition. */ private Pair getThumbnailTransitionActivityOptions(ActivityManager.RunningTaskInfo runningTask, Rect windowOverrideRect) { if (runningTask != null && runningTask.stackId == FREEFORM_WORKSPACE_STACK_ID) { ArrayList specs = new ArrayList<>(); ArrayList tasks; TaskStackLayoutAlgorithm stackLayout; TaskStackViewScroller stackScroller; synchronized (mDummyStackView) { tasks = mDummyStackView.getStack().getStackTasks(); stackLayout = mDummyStackView.getStackAlgorithm(); stackScroller = mDummyStackView.getScroller(); mDummyStackView.updateLayoutAlgorithm(true /* boundScroll */); mDummyStackView.updateToInitialState(); } for (int i = tasks.size() - 1; i >= 0; i--) { Task task = tasks.get(i); if (task.isFreeformTask()) { mTmpTransform = stackLayout.getStackTransformScreenCoordinates(task, stackScroller.getStackScroll(), mTmpTransform, null, windowOverrideRect); GraphicBuffer thumbnail = drawThumbnailTransitionBitmap(task, mTmpTransform); Rect toTaskRect = new Rect(); mTmpTransform.rect.round(toTaskRect); specs.add(new AppTransitionAnimationSpec(task.key.id, thumbnail, toTaskRect)); } } AppTransitionAnimationSpec[] specsArray = new AppTransitionAnimationSpec[specs.size()]; specs.toArray(specsArray); return new Pair<>(ActivityOptions.makeThumbnailAspectScaleDownAnimation(mDummyStackView, specsArray, mHandler, null, this), null); } else { // Update the destination rect Task toTask = new Task(); TaskViewTransform toTransform = getThumbnailTransitionTransform(mDummyStackView, toTask, windowOverrideRect); RectF toTaskRect = toTransform.rect; AppTransitionAnimationSpecsFuture future = new RecentsTransitionHelper(mContext).getAppTransitionFuture( () -> { Rect rect = new Rect(); toTaskRect.round(rect); GraphicBuffer thumbnail = drawThumbnailTransitionBitmap(toTask, toTransform); return Lists.newArrayList(new AppTransitionAnimationSpec( toTask.key.id, thumbnail, rect)); }); return new Pair<>(ActivityOptions.makeMultiThumbFutureAspectScaleAnimation(mContext, mHandler, future.getFuture(), null, false /* scaleUp */), future); } } /** * Returns the transition rect for the given task id. */ private TaskViewTransform getThumbnailTransitionTransform(TaskStackView stackView, Task runningTaskOut, Rect windowOverrideRect) { // Find the running task in the TaskStack TaskStack stack = stackView.getStack(); Task launchTask = stack.getLaunchTarget(); if (launchTask != null) { runningTaskOut.copyFrom(launchTask); } else { // If no task is specified or we can not find the task just use the front most one launchTask = stack.getStackFrontMostTask(true /* includeFreeform */); runningTaskOut.copyFrom(launchTask); } // Get the transform for the running task stackView.updateLayoutAlgorithm(true /* boundScroll */); stackView.updateToInitialState(); stackView.getStackAlgorithm().getStackTransformScreenCoordinates(launchTask, stackView.getScroller().getStackScroll(), mTmpTransform, null, windowOverrideRect); return mTmpTransform; } /** * Draws the header of a task used for the window animation into a bitmap. */ private GraphicBuffer drawThumbnailTransitionBitmap(Task toTask, TaskViewTransform toTransform) { SystemServicesProxy ssp = Recents.getSystemServices(); if (toTransform != null && toTask.key != null) { synchronized (mHeaderBarLock) { boolean disabledInSafeMode = !toTask.isSystemApp && ssp.isInSafeMode(); int width = (int) toTransform.rect.width(); int height = (int) toTransform.rect.height(); mHeaderBar.onTaskViewSizeChanged(width, height); if (RecentsDebugFlags.Static.EnableTransitionThumbnailDebugMode) { return RecentsTransitionHelper.drawViewIntoGraphicBuffer(width, mTaskBarHeight, null, 1f, 0xFFff0000); } else { // Workaround for b/27815919, reset the callback so that we do not trigger an // invalidate on the header bar as a result of updating the icon Drawable icon = mHeaderBar.getIconView().getDrawable(); if (icon != null) { icon.setCallback(null); } mHeaderBar.bindToTask(toTask, false /* touchExplorationEnabled */, disabledInSafeMode); mHeaderBar.onTaskDataLoaded(); mHeaderBar.setDimAlpha(toTransform.dimAlpha); return RecentsTransitionHelper.drawViewIntoGraphicBuffer(width, mTaskBarHeight, mHeaderBar, 1f, 0); } } } return null; } /** * Shows the recents activity */ protected void startRecentsActivity(ActivityManager.RunningTaskInfo runningTask, boolean isHomeStackVisible, boolean animate, int growTarget) { RecentsTaskLoader loader = Recents.getTaskLoader(); RecentsActivityLaunchState launchState = Recents.getConfiguration().getLaunchState(); SystemServicesProxy ssp = Recents.getSystemServices(); boolean isBlacklisted = (runningTask != null) ? ssp.isBlackListedActivity(runningTask.baseActivity.getClassName()) : false; int runningTaskId = !mLaunchedWhileDocking && !isBlacklisted && (runningTask != null) ? runningTask.id : -1; // In the case where alt-tab is triggered, we never get a preloadRecents() call, so we // should always preload the tasks now. If we are dragging in recents, reload them as // the stacks might have changed. if (mLaunchedWhileDocking || mTriggeredFromAltTab || sInstanceLoadPlan == null) { // Create a new load plan if preloadRecents() was never triggered sInstanceLoadPlan = loader.createLoadPlan(mContext); } if (mLaunchedWhileDocking || mTriggeredFromAltTab || !sInstanceLoadPlan.hasTasks()) { loader.preloadTasks(sInstanceLoadPlan, runningTaskId, !isHomeStackVisible); } TaskStack stack = sInstanceLoadPlan.getTaskStack(); boolean hasRecentTasks = stack.getTaskCount() > 0; boolean useThumbnailTransition = (runningTask != null) && !isHomeStackVisible && hasRecentTasks; // Update the launch state that we need in updateHeaderBarLayout() launchState.launchedFromHome = !useThumbnailTransition && !mLaunchedWhileDocking; launchState.launchedFromApp = useThumbnailTransition || mLaunchedWhileDocking; launchState.launchedFromBlacklistedApp = launchState.launchedFromApp && isBlacklisted; launchState.launchedFromPipApp = false; launchState.launchedWithNextPipApp = stack.isNextLaunchTargetPip(RecentsImpl.getLastPipTime()); launchState.launchedViaDockGesture = mLaunchedWhileDocking; launchState.launchedViaDragGesture = mDraggingInRecents; launchState.launchedToTaskId = runningTaskId; launchState.launchedWithAltTab = mTriggeredFromAltTab; // Preload the icon (this will be a null-op if we have preloaded the icon already in // preloadRecents()) preloadIcon(runningTaskId); // Update the header bar if necessary Rect windowOverrideRect = getWindowRectOverride(growTarget); updateHeaderBarLayout(stack, windowOverrideRect); // Prepare the dummy stack for the transition TaskStackLayoutAlgorithm.VisibilityReport stackVr; synchronized (mDummyStackView) { stackVr = mDummyStackView.computeStackVisibilityReport(); } // Update the remaining launch state launchState.launchedNumVisibleTasks = stackVr.numVisibleTasks; launchState.launchedNumVisibleThumbnails = stackVr.numVisibleThumbnails; if (!animate) { startRecentsActivity(ActivityOptions.makeCustomAnimation(mContext, -1, -1), null /* future */); return; } Pair pair; if (isBlacklisted) { pair = new Pair<>(getUnknownTransitionActivityOptions(), null); } else if (useThumbnailTransition) { // Try starting with a thumbnail transition pair = getThumbnailTransitionActivityOptions(runningTask, windowOverrideRect); } else { // If there is no thumbnail transition, but is launching from home into recents, then // use a quick home transition pair = new Pair<>(hasRecentTasks ? getHomeTransitionActivityOptions() : getUnknownTransitionActivityOptions(), null); } startRecentsActivity(pair.first, pair.second); mLastToggleTime = SystemClock.elapsedRealtime(); } private Rect getWindowRectOverride(int growTarget) { if (growTarget == DividerView.INVALID_RECENTS_GROW_TARGET) { return SystemServicesProxy.getInstance(mContext).getWindowRect(); } Rect result = new Rect(); Rect displayRect = Recents.getSystemServices().getDisplayRect(); DockedDividerUtils.calculateBoundsForPosition(growTarget, WindowManager.DOCKED_BOTTOM, result, displayRect.width(), displayRect.height(), Recents.getSystemServices().getDockedDividerSize(mContext)); return result; } /** * Starts the recents activity. */ private void startRecentsActivity(ActivityOptions opts, final AppTransitionAnimationSpecsFuture future) { Intent intent = new Intent(); intent.setClassName(RECENTS_PACKAGE, RECENTS_ACTIVITY); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS | Intent.FLAG_ACTIVITY_TASK_ON_HOME); HidePipMenuEvent hideMenuEvent = new HidePipMenuEvent(); hideMenuEvent.addPostAnimationCallback(() -> { Recents.getSystemServices().startActivityAsUserAsync(intent, opts); EventBus.getDefault().send(new RecentsActivityStartingEvent()); if (future != null) { future.precacheSpecs(); } }); EventBus.getDefault().send(hideMenuEvent); } /**** OnAnimationFinishedListener Implementation ****/ @Override public void onAnimationFinished() { EventBus.getDefault().post(new EnterRecentsWindowLastAnimationFrameEvent()); } }