void showRelativeAffiliatedTask(boolean showNextTask) {
// Return early if there is no focused stack
int focusedStackId = mSystemServicesProxy.getFocusedStack();
TaskStack focusedStack = null;
RecentsTaskLoader loader = RecentsTaskLoader.getInstance();
RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext);
loader.preloadTasks(plan, true /* isTopTaskHome */);
if (mConfig.multiStackEnabled) {
if (focusedStackId < 0) return;
focusedStack = plan.getTaskStack(focusedStackId);
} else {
focusedStack = plan.getAllTaskStacks().get(0);
}
// Return early if there are no tasks in the focused stack
if (focusedStack == null || focusedStack.getTaskCount() == 0) return;
ActivityManager.RunningTaskInfo runningTask = mSystemServicesProxy.getTopMostTask();
// Return early if there is no running task (can't determine affiliated tasks in this case)
if (runningTask == null) return;
// Return early if the running task is in the home stack (optimization)
if (mSystemServicesProxy.isInHomeStack(runningTask.id)) return;
// Find the task in the recents list
ArrayList<Task> tasks = focusedStack.getTasks();
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) {
mSystemServicesProxy.startInPlaceAnimationOnFrontMostApplication(
ActivityOptions.makeCustomInPlaceAnimation(
mContext, R.anim.recents_launch_next_affiliated_task_bounce));
} else {
mSystemServicesProxy.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
if (toTask.isActive) {
// Bring an active task to the foreground
mSystemServicesProxy.moveTaskToFront(toTask.key.id, launchOpts);
} else {
mSystemServicesProxy.startActivityFromRecents(
mContext, toTask.key.id, toTask.activityLabel, launchOpts);
}
}
