/** This is called with the full size of the window since we are handling our own insets. */
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
Log.d(TAG, "onLayout: ");
// Get the search bar bounds so that we lay it out
if (mSearchBar != null) {
Rect searchBarSpaceBounds = new Rect();
mConfig.getSearchBarBounds(
getMeasuredWidth(), getMeasuredHeight(), mConfig.systemInsets.top, searchBarSpaceBounds);
mSearchBar.layout(
searchBarSpaceBounds.left,
searchBarSpaceBounds.top,
searchBarSpaceBounds.right,
searchBarSpaceBounds.bottom);
}
// Layout each TaskStackView with the full width and height of the window since the
// transition view is a child of that stack view
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
if (stackView.getVisibility() != GONE) {
stackView.layout(
left, top, left + stackView.getMeasuredWidth(), top + stackView.getMeasuredHeight());
}
}
}
/** Launches the task that Recents was launched from, if possible */
public boolean launchPreviousTask() {
// Get the first stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
TaskStack stack = stackView.mStack;
ArrayList<Task> tasks = stack.getTasks();
// Find the launch task in the stack
if (!tasks.isEmpty()) {
int taskCount = tasks.size();
for (int j = 0; j < taskCount; j++) {
if (tasks.get(j).isLaunchTarget) {
Task task = tasks.get(j);
TaskView tv = stackView.getChildViewForTask(task);
onTaskViewClicked(stackView, tv, stack, task, false);
return true;
}
}
}
}
}
return false;
}
/** Set/get the bsp root node */
public void setTaskStacks(ArrayList<TaskStack> stacks) {
// Remove all TaskStackViews (but leave the search bar)
int childCount = getChildCount();
for (int i = childCount - 1; i >= 0; i--) {
View v = getChildAt(i);
if (v != mSearchBar) {
removeViewAt(i);
}
}
// Create and add all the stacks for this partition of space.
mStacks = stacks;
int numStacks = mStacks.size();
for (int i = 0; i < numStacks; i++) {
TaskStack stack = mStacks.get(i);
TaskStackView stackView = new TaskStackView(getContext(), stack);
stackView.setCallbacks(this);
// Enable debug mode drawing
if (mConfig.debugModeEnabled) {
stackView.setDebugOverlay(mDebugOverlay);
}
addView(stackView);
}
// Reset the launched state
mAlreadyLaunchingTask = false;
}
/** This is called with the full size of the window since we are handling our own insets. */
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
// Get the search bar bounds and measure the search bar layout
if (mSearchBar != null) {
Rect searchBarSpaceBounds = new Rect();
mConfig.getSearchBarBounds(width, height, mConfig.systemInsets.top, searchBarSpaceBounds);
mSearchBar.measure(
MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.width(), MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.height(), MeasureSpec.EXACTLY));
}
Rect taskStackBounds = new Rect();
mConfig.getTaskStackBounds(
width, height, mConfig.systemInsets.top, mConfig.systemInsets.right, taskStackBounds);
// Measure each TaskStackView with the full width and height of the window since the
// transition view is a child of that stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar && child.getVisibility() != GONE) {
TaskStackView tsv = (TaskStackView) child;
// Set the insets to be the top/left inset + search bounds
tsv.setStackInsetRect(taskStackBounds);
tsv.measure(widthMeasureSpec, heightMeasureSpec);
}
}
setMeasuredDimension(width, height);
}
/** Launches the task that Recents was launched from, if possible */
public boolean launchPreviousTask() {
Log.d(TAG, "launchPreviousTask: ");
// Get the first stack view
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
TaskStack stack = stackView.getStack();
ArrayList<Task> tasks = stack.getTasks();
// Find the launch task in the stack
if (!tasks.isEmpty()) {
int taskCount = tasks.size();
for (int j = 0; j < taskCount; j++) {
if (tasks.get(j).isLaunchTarget) {
Task task = tasks.get(j);
TaskView tv = stackView.getChildViewForTask(task);
onTaskViewClicked(stackView, tv, stack, task, false);
return true;
}
}
}
}
return false;
}
/** Returns the transition rect for the given task id. */
TaskViewTransform getThumbnailTransitionTransform(
TaskStack stack, TaskStackView stackView, int runningTaskId, Task runningTaskOut) {
// Find the running task in the TaskStack
Task task = null;
ArrayList<Task> tasks = stack.getTasks();
if (runningTaskId != -1) {
// Otherwise, try and find the task with the
int taskCount = tasks.size();
for (int i = taskCount - 1; i >= 0; i--) {
Task t = tasks.get(i);
if (t.key.id == runningTaskId) {
task = t;
runningTaskOut.copyFrom(t);
break;
}
}
}
if (task == null) {
// If no task is specified or we can not find the task just use the front most one
task = tasks.get(tasks.size() - 1);
runningTaskOut.copyFrom(task);
}
// Get the transform for the running task
stackView.getScroller().setStackScrollToInitialState();
mTmpTransform =
stackView
.getStackAlgorithm()
.getStackTransform(task, stackView.getScroller().getStackScroll(), mTmpTransform, null);
return mTmpTransform;
}
/** Final callback after Recents is finally hidden. */
public void onRecentsHidden() {
// Notify each task stack view
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
stackView.onRecentsHidden();
}
}
/** Notifies each task view of the user interaction. */
public void onUserInteraction() {
Log.d(TAG, "onUserInteraction: ");
// Get the first stack view
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
stackView.onUserInteraction();
}
}
/** Requests all task stacks to start their enter-recents animation */
public void startEnterRecentsAnimation(ViewAnimation.TaskViewEnterContext ctx) {
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.startEnterRecentsAnimation(ctx);
}
}
}
/** ** RecentsPackageMonitor.PackageCallbacks Implementation *** */
@Override
public void onPackagesChanged(RecentsPackageMonitor monitor, String packageName, int userId) {
// Propagate this event down to each task stack view
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
stackView.onPackagesChanged(monitor, packageName, userId);
}
}
/** Notifies each task view of the user interaction. */
public void onUserInteraction() {
// Get the first stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.onUserInteraction();
}
}
}
/** ** RecentsPackageMonitor.PackageCallbacks Implementation *** */
@Override
public void onComponentRemoved(HashSet<ComponentName> cns) {
// Propagate this event down to each task stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.onComponentRemoved(cns);
}
}
}
/** Focuses the next task in the first stack view */
public void focusNextTask(boolean forward) {
// Get the first stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.focusNextTask(forward);
break;
}
}
}
/** Dismisses the focused task. */
public void dismissFocusedTask() {
// Get the first stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.dismissFocusedTask();
break;
}
}
}
/** Requests all task stacks to start their exit-recents animation */
public void startExitToHomeAnimation(ViewAnimation.TaskViewExitContext ctx) {
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.startExitToHomeAnimation(ctx);
}
}
// Notify of the exit animation
mCb.onExitToHomeAnimationTriggered();
}
/** Requests all task stacks to start their enter-recents animation */
public void startEnterRecentsAnimation(ViewAnimation.TaskViewEnterContext ctx) {
Log.d(TAG, "startEnterRecentsAnimation: ");
// We have to increment/decrement the post animation trigger in case there are no children
// to ensure that it runs
ctx.postAnimationTrigger.increment();
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
stackView.startEnterRecentsAnimation(ctx);
}
ctx.postAnimationTrigger.decrement();
}
/**
* Caches the header thumbnail used for a window animation asynchronously into {@link
* #mThumbnailTransitionBitmapCache}.
*/
void preCacheThumbnailTransitionBitmapAsync(
ActivityManager.RunningTaskInfo topTask,
TaskStack stack,
TaskStackView stackView,
boolean isTopTaskHome) {
preloadIcon(topTask);
// Update the destination rect
mDummyStackView.updateMinMaxScrollForStack(stack, mTriggeredFromAltTab, isTopTaskHome);
final Task toTask = new Task();
final TaskViewTransform toTransform =
getThumbnailTransitionTransform(stack, stackView, topTask.id, toTask);
new AsyncTask<Void, Void, Bitmap>() {
@Override
protected Bitmap doInBackground(Void... params) {
return drawThumbnailTransitionBitmap(toTask, toTransform);
}
@Override
protected void onPostExecute(Bitmap bitmap) {
mThumbnailTransitionBitmapCache = bitmap;
mThumbnailTransitionBitmapCacheKey = toTask;
}
}.execute();
}
/** This is called with the full size of the window since we are handling our own insets. */
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.d(TAG, "onMeasure: ");
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
// Get the search bar bounds and measure the search bar layout
Rect searchBarSpaceBounds = new Rect();
if (mSearchBar != null) {
mConfig.getSearchBarBounds(width, height, mConfig.systemInsets.top, searchBarSpaceBounds);
mSearchBar.measure(
MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.width(), MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.height(), MeasureSpec.EXACTLY));
}
Rect taskStackBounds = new Rect();
mConfig.getAvailableTaskStackBounds(
width,
height,
mConfig.systemInsets.top,
mConfig.systemInsets.right,
searchBarSpaceBounds,
taskStackBounds);
// Measure each TaskStackView with the full width and height of the window since the
// transition view is a child of that stack view
List<TaskStackView> stackViews = getTaskStackViews();
List<Rect> stackViewsBounds = mLayoutAlgorithm.computeStackRects(stackViews, taskStackBounds);
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
if (stackView.getVisibility() != GONE) {
// We are going to measure the TaskStackView with the whole RecentsView dimensions,
// but the actual stack is going to be inset to the bounds calculated by the layout
// algorithm
stackView.setStackInsetRect(stackViewsBounds.get(i));
stackView.measure(widthMeasureSpec, heightMeasureSpec);
}
}
setMeasuredDimension(width, height);
}
/** Launches a given task. */
public boolean launchTask(Task task) {
Log.d(TAG, "launchTask: ");
// Get the first stack view
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
TaskStack stack = stackView.getStack();
// Iterate the stack views and try and find the given task.
List<TaskView> taskViews = stackView.getTaskViews();
int taskViewCount = taskViews.size();
for (int j = 0; j < taskViewCount; j++) {
TaskView tv = taskViews.get(j);
if (tv.getTask() == task) {
onTaskViewClicked(stackView, tv, stack, task, false);
return true;
}
}
}
return false;
}
/** Launches the focused task from the first stack if possible */
public boolean launchFocusedTask() {
// Get the first stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
TaskStack stack = stackView.mStack;
// Iterate the stack views and try and find the focused task
int taskCount = stackView.getChildCount();
for (int j = 0; j < taskCount; j++) {
TaskView tv = (TaskView) stackView.getChildAt(j);
Task task = tv.getTask();
if (tv.isFocusedTask()) {
onTaskViewClicked(stackView, tv, stack, task, false);
return true;
}
}
}
}
return false;
}
/** Prepares the header bar layout. */
void reloadHeaderBarLayout() {
Resources res = mContext.getResources();
mWindowRect = mSystemServicesProxy.getWindowRect();
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);
mConfig = RecentsConfiguration.reinitialize(mContext, mSystemServicesProxy);
mConfig.updateOnConfigurationChange();
Rect searchBarBounds = new Rect();
// Try and pre-emptively bind the search widget on startup to ensure that we
// have the right thumbnail bounds to animate to.
// Note: We have to reload the widget id before we get the task stack bounds below
if (mSystemServicesProxy.getOrBindSearchAppWidget(mContext, mAppWidgetHost) != null) {
mConfig.getSearchBarBounds(
mWindowRect.width(), mWindowRect.height(), mStatusBarHeight, searchBarBounds);
}
mConfig.getAvailableTaskStackBounds(
mWindowRect.width(),
mWindowRect.height(),
mStatusBarHeight,
(mConfig.hasTransposedNavBar ? mNavBarWidth : 0),
searchBarBounds,
mTaskStackBounds);
if (mConfig.isLandscape && mConfig.hasTransposedNavBar) {
mSystemInsets.set(0, mStatusBarHeight, mNavBarWidth, 0);
} else {
mSystemInsets.set(0, mStatusBarHeight, 0, mNavBarHeight);
}
// Inflate the header bar layout so that we can rebind and draw it for the transition
TaskStack stack = new TaskStack();
mDummyStackView = new TaskStackView(mContext, stack);
TaskStackViewLayoutAlgorithm algo = mDummyStackView.getStackAlgorithm();
Rect taskStackBounds = new Rect(mTaskStackBounds);
taskStackBounds.bottom -= mSystemInsets.bottom;
algo.computeRects(mWindowRect.width(), mWindowRect.height(), taskStackBounds);
Rect taskViewSize = algo.getUntransformedTaskViewSize();
int taskBarHeight = res.getDimensionPixelSize(R.dimen.recents_task_bar_height);
synchronized (mHeaderBarLock) {
mHeaderBar =
(TaskViewHeader) mInflater.inflate(R.layout.recents_task_view_header, null, false);
mHeaderBar.measure(
View.MeasureSpec.makeMeasureSpec(taskViewSize.width(), View.MeasureSpec.EXACTLY),
View.MeasureSpec.makeMeasureSpec(taskBarHeight, View.MeasureSpec.EXACTLY));
mHeaderBar.layout(0, 0, taskViewSize.width(), taskBarHeight);
}
}
/** Set/get the bsp root node */
public void setTaskStacks(ArrayList<TaskStack> stacks) {
Log.d(TAG, "setTaskStacks: ");
int numStacks = stacks.size();
// Remove all/extra stack views
int numTaskStacksToKeep = 0; // Keep no tasks if we are recreating the layout
if (mConfig.launchedReuseTaskStackViews) {
numTaskStacksToKeep = Math.min(mTaskStackViews.size(), numStacks);
}
for (int i = mTaskStackViews.size() - 1; i >= numTaskStacksToKeep; i--) {
removeView(mTaskStackViews.remove(i));
}
// Update the stack views that we are keeping
for (int i = 0; i < numTaskStacksToKeep; i++) {
TaskStackView tsv = mTaskStackViews.get(i);
// If onRecentsHidden is not triggered, we need to the stack view again here
tsv.reset();
tsv.setStack(stacks.get(i));
}
// Add remaining/recreate stack views
mStacks = stacks;
for (int i = mTaskStackViews.size(); i < numStacks; i++) {
TaskStack stack = stacks.get(i);
TaskStackView stackView = new TaskStackView(getContext(), stack);
stackView.setCallbacks(this);
addView(stackView);
mTaskStackViews.add(stackView);
}
// Enable debug mode drawing on all the stacks if necessary
if (mConfig.debugModeEnabled) {
for (int i = mTaskStackViews.size() - 1; i >= 0; i--) {
TaskStackView stackView = mTaskStackViews.get(i);
stackView.setDebugOverlay(mDebugOverlay);
}
}
// Trigger a new layout
requestLayout();
}
/** ** TaskStackView.TaskStackCallbacks Implementation *** */
@Override
public void onTaskViewClicked(
final TaskStackView stackView,
final TaskView tv,
final TaskStack stack,
final Task task,
final boolean lockToTask) {
// Notify any callbacks of the launching of a new task
if (mCb != null) {
mCb.onTaskViewClicked();
}
// Skip if we are already launching tasks
if (mAlreadyLaunchingTask) {
return;
}
mAlreadyLaunchingTask = true;
// Upfront the processing of the thumbnail
TaskViewTransform transform = new TaskViewTransform();
View sourceView;
int offsetX = 0;
int offsetY = 0;
float stackScroll = stackView.getScroller().getStackScroll();
if (tv == null) {
// If there is no actual task view, then use the stack view as the source view
// and then offset to the expected transform rect, but bound this to just
// outside the display rect (to ensure we don't animate from too far away)
sourceView = stackView;
transform =
stackView.getStackAlgorithm().getStackTransform(task, stackScroll, transform, null);
offsetX = transform.rect.left;
offsetY = mConfig.displayRect.height();
} else {
sourceView = tv.mThumbnailView;
transform =
stackView.getStackAlgorithm().getStackTransform(task, stackScroll, transform, null);
}
// Compute the thumbnail to scale up from
final SystemServicesProxy ssp = RecentsTaskLoader.getInstance().getSystemServicesProxy();
ActivityOptions opts = null;
if (task.thumbnail != null && task.thumbnail.getWidth() > 0 && task.thumbnail.getHeight() > 0) {
Bitmap b;
if (tv != null) {
// Disable any focused state before we draw the header
if (tv.isFocusedTask()) {
tv.unsetFocusedTask();
}
float scale = tv.getScaleX();
int fromHeaderWidth = (int) (tv.mHeaderView.getMeasuredWidth() * scale);
int fromHeaderHeight = (int) (tv.mHeaderView.getMeasuredHeight() * scale);
b = Bitmap.createBitmap(fromHeaderWidth, fromHeaderHeight, Bitmap.Config.ARGB_8888);
if (Constants.DebugFlags.App.EnableTransitionThumbnailDebugMode) {
b.eraseColor(0xFFff0000);
} else {
Canvas c = new Canvas(b);
c.scale(tv.getScaleX(), tv.getScaleY());
tv.mHeaderView.draw(c);
c.setBitmap(null);
}
} else {
// Notify the system to skip the thumbnail layer by using an ALPHA_8 bitmap
b = Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
}
ActivityOptions.OnAnimationStartedListener animStartedListener = null;
if (lockToTask) {
animStartedListener =
new ActivityOptions.OnAnimationStartedListener() {
boolean mTriggered = false;
@Override
public void onAnimationStarted() {
if (!mTriggered) {
postDelayed(
new Runnable() {
@Override
public void run() {
ssp.lockCurrentTask();
}
},
350);
mTriggered = true;
}
}
};
}
opts =
ActivityOptions.makeThumbnailAspectScaleUpAnimation(
sourceView,
b,
offsetX,
offsetY,
transform.rect.width(),
transform.rect.height(),
animStartedListener);
}
final ActivityOptions launchOpts = opts;
final Runnable launchRunnable =
new Runnable() {
@Override
public void run() {
if (task.isActive) {
// Bring an active task to the foreground
ssp.moveTaskToFront(task.key.id, launchOpts);
} else {
if (ssp.startActivityFromRecents(
getContext(), task.key.id, task.activityLabel, launchOpts)) {
if (launchOpts == null && lockToTask) {
ssp.lockCurrentTask();
}
} else {
// Dismiss the task and return the user to home if we fail to
// launch the task
onTaskViewDismissed(task);
if (mCb != null) {
mCb.onTaskLaunchFailed();
}
}
}
}
};
// Launch the app right away if there is no task view, otherwise, animate the icon out first
if (tv == null) {
post(launchRunnable);
} else {
if (!task.group.isFrontMostTask(task)) {
// For affiliated tasks that are behind other tasks, we must animate the front cards
// out of view before starting the task transition
stackView.startLaunchTaskAnimation(tv, launchRunnable, lockToTask);
} else {
// Otherwise, we can start the task transition immediately
stackView.startLaunchTaskAnimation(tv, null, lockToTask);
postDelayed(launchRunnable, 17);
}
}
}
/** Starts the recents activity */
void startRecentsActivity(ActivityManager.RunningTaskInfo topTask, boolean isTopTaskHome) {
RecentsTaskLoader loader = RecentsTaskLoader.getInstance();
RecentsConfiguration.reinitialize(mContext, mSystemServicesProxy);
if (sInstanceLoadPlan == null) {
// Create a new load plan if onPreloadRecents() was never triggered
sInstanceLoadPlan = loader.createLoadPlan(mContext);
}
// Temporarily skip the transition (use a dummy fade) if multi stack is enabled.
// For multi-stack we need to figure out where each of the tasks are going.
if (mConfig.multiStackEnabled) {
loader.preloadTasks(sInstanceLoadPlan, true);
ArrayList<TaskStack> stacks = sInstanceLoadPlan.getAllTaskStacks();
TaskStack stack = stacks.get(0);
mDummyStackView.updateMinMaxScrollForStack(stack, mTriggeredFromAltTab, true);
TaskStackViewLayoutAlgorithm.VisibilityReport stackVr =
mDummyStackView.computeStackVisibilityReport();
ActivityOptions opts = getUnknownTransitionActivityOptions();
startAlternateRecentsActivity(
topTask,
opts,
true /* fromHome */,
false /* fromSearchHome */,
false /* fromThumbnail */,
stackVr);
return;
}
if (!sInstanceLoadPlan.hasTasks()) {
loader.preloadTasks(sInstanceLoadPlan, isTopTaskHome);
}
ArrayList<TaskStack> stacks = sInstanceLoadPlan.getAllTaskStacks();
TaskStack stack = stacks.get(0);
// Prepare the dummy stack for the transition
mDummyStackView.updateMinMaxScrollForStack(stack, mTriggeredFromAltTab, isTopTaskHome);
TaskStackViewLayoutAlgorithm.VisibilityReport stackVr =
mDummyStackView.computeStackVisibilityReport();
boolean hasRecentTasks = stack.getTaskCount() > 0;
boolean useThumbnailTransition = (topTask != null) && !isTopTaskHome && hasRecentTasks;
if (useThumbnailTransition) {
// Try starting with a thumbnail transition
ActivityOptions opts = getThumbnailTransitionActivityOptions(topTask, stack, mDummyStackView);
if (opts != null) {
startAlternateRecentsActivity(
topTask,
opts,
false /* fromHome */,
false /* fromSearchHome */,
true /* fromThumbnail */,
stackVr);
} else {
// Fall through below to the non-thumbnail transition
useThumbnailTransition = false;
}
}
if (!useThumbnailTransition) {
// If there is no thumbnail transition, but is launching from home into recents, then
// use a quick home transition and do the animation from home
if (hasRecentTasks) {
String homeActivityPackage = mSystemServicesProxy.getHomeActivityPackageName();
String searchWidgetPackage =
Prefs.getString(mContext, Prefs.Key.SEARCH_APP_WIDGET_PACKAGE, null);
// Determine whether we are coming from a search owned home activity
boolean fromSearchHome =
(homeActivityPackage != null) && homeActivityPackage.equals(searchWidgetPackage);
ActivityOptions opts = getHomeTransitionActivityOptions(fromSearchHome);
startAlternateRecentsActivity(
topTask, opts, true /* fromHome */, fromSearchHome, false /* fromThumbnail */, stackVr);
} else {
// Otherwise we do the normal fade from an unknown source
ActivityOptions opts = getUnknownTransitionActivityOptions();
startAlternateRecentsActivity(
topTask,
opts,
true /* fromHome */,
false /* fromSearchHome */,
false /* fromThumbnail */,
stackVr);
}
}
mLastToggleTime = SystemClock.elapsedRealtime();
}
/** ** TaskStackView.TaskStackCallbacks Implementation *** */
@Override
public void onTaskViewClicked(
final TaskStackView stackView,
final TaskView tv,
final TaskStack stack,
final Task task,
final boolean lockToTask) {
Log.d(TAG, "onTaskViewClicked: ");
// Notify any callbacks of the launching of a new task
if (mCb != null) {
mCb.onTaskViewClicked();
}
// Upfront the processing of the thumbnail
TaskViewTransform transform = new TaskViewTransform();
View sourceView;
int offsetX = 0;
int offsetY = 0;
float stackScroll = stackView.getScroller().getStackScroll();
if (tv == null) {
// If there is no actual task view, then use the stack view as the source view
// and then offset to the expected transform rect, but bound this to just
// outside the display rect (to ensure we don't animate from too far away)
sourceView = stackView;
transform =
stackView.getStackAlgorithm().getStackTransform(task, stackScroll, transform, null);
offsetX = transform.rect.left;
offsetY = mConfig.displayRect.height();
} else {
sourceView = tv.mThumbnailView;
transform =
stackView.getStackAlgorithm().getStackTransform(task, stackScroll, transform, null);
}
// Compute the thumbnail to scale up from
final SystemServicesProxy ssp = RecentsTaskLoader.getInstance().getSystemServicesProxy();
ActivityOptions opts = null;
if (task.thumbnail != null && task.thumbnail.getWidth() > 0 && task.thumbnail.getHeight() > 0) {
ActivityOptions.OnAnimationStartedListener animStartedListener = null;
if (lockToTask) {
animStartedListener =
new ActivityOptions.OnAnimationStartedListener() {
boolean mTriggered = false;
@Override
public void onAnimationStarted() {
if (!mTriggered) {
postDelayed(
new Runnable() {
@Override
public void run() {
mCb.onScreenPinningRequest();
}
},
350);
mTriggered = true;
}
}
};
}
if (tv != null) {
postDrawHeaderThumbnailTransitionRunnable(
tv, offsetX, offsetY, transform, animStartedListener);
}
if (mConfig.multiStackEnabled) {
opts =
ActivityOptions.makeCustomAnimation(
sourceView.getContext(),
R.anim.recents_from_unknown_enter,
R.anim.recents_from_unknown_exit,
sourceView.getHandler(),
animStartedListener);
} else {
opts =
ActivityOptions.makeThumbnailAspectScaleUpAnimation(
sourceView,
Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8).createAshmemBitmap(),
offsetX,
offsetY,
transform.rect.width(),
transform.rect.height(),
sourceView.getHandler(),
animStartedListener);
}
}
final ActivityOptions launchOpts = opts;
final Runnable launchRunnable =
new Runnable() {
@Override
public void run() {
if (task.isActive) {
// Bring an active task to the foreground
ssp.moveTaskToFront(task.key.id, launchOpts);
} else {
if (ssp.startActivityFromRecents(
getContext(), task.key.id, task.activityLabel, launchOpts)) {
if (launchOpts == null && lockToTask) {
mCb.onScreenPinningRequest();
}
} else {
// Dismiss the task and return the user to home if we fail to
// launch the task
onTaskViewDismissed(task);
if (mCb != null) {
mCb.onTaskLaunchFailed();
}
// Keep track of failed launches
MetricsLogger.count(getContext(), "overview_task_launch_failed", 1);
}
}
}
};
// Keep track of the index of the task launch
int taskIndexFromFront = 0;
int taskIndex = stack.indexOfTask(task);
if (taskIndex > -1) {
taskIndexFromFront = stack.getTaskCount() - taskIndex - 1;
}
MetricsLogger.histogram(getContext(), "overview_task_launch_index", taskIndexFromFront);
// Launch the app right away if there is no task view, otherwise, animate the icon out first
if (tv == null) {
launchRunnable.run();
} else {
if (task.group != null && !task.group.isFrontMostTask(task)) {
// For affiliated tasks that are behind other tasks, we must animate the front cards
// out of view before starting the task transition
stackView.startLaunchTaskAnimation(tv, launchRunnable, lockToTask);
} else {
// Otherwise, we can start the task transition immediately
stackView.startLaunchTaskAnimation(tv, null, lockToTask);
launchRunnable.run();
}
}
}