diff options
| -rw-r--r-- | services/core/java/com/android/server/wm/RecentTasks.java | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/services/core/java/com/android/server/wm/RecentTasks.java b/services/core/java/com/android/server/wm/RecentTasks.java index 4faaf5170f27..f33ecaa90531 100644 --- a/services/core/java/com/android/server/wm/RecentTasks.java +++ b/services/core/java/com/android/server/wm/RecentTasks.java @@ -183,6 +183,8 @@ class RecentTasks { /** The non-empty tasks that are removed from recent tasks (see {@link #removeForAddTask}). */ private final ArrayList<Task> mHiddenTasks = new ArrayList<>(); + /** The maximum size that the hidden tasks are cached. */ + private static final int MAX_HIDDEN_TASK_SIZE = 10; /** Whether to trim inactive tasks when activities are idle. */ private boolean mCheckTrimmableTasksOnIdle; @@ -1497,9 +1499,13 @@ class RecentTasks { return task.compareTo(rootHomeTask) < 0; } - /** Remove the tasks that user may not be able to return. */ + /** Remove the tasks that user may not be able to return when exceeds the cache limit. */ private void removeUnreachableHiddenTasks(int windowingMode) { - for (int i = mHiddenTasks.size() - 1; i >= 0; i--) { + final int size = mHiddenTasks.size(); + if (size <= MAX_HIDDEN_TASK_SIZE) { + return; + } + for (int i = size - 1; i >= MAX_HIDDEN_TASK_SIZE; i--) { final Task hiddenTask = mHiddenTasks.get(i); if (!hiddenTask.hasChild() || hiddenTask.inRecents) { // The task was removed by other path or it became reachable (added to recents). @@ -1543,7 +1549,7 @@ class RecentTasks { // A non-empty task is replaced by a new task. Because the removed task is no longer // managed by the recent tasks list, add it to the hidden list to prevent the task // from becoming dangling. - mHiddenTasks.add(removedTask); + mHiddenTasks.add(0, removedTask); } notifyTaskRemoved(removedTask, false /* wasTrimmed */, false /* killProcess */); if (DEBUG_RECENTS_TRIM_TASKS) { |