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am 245645ca: Merge "Don\'t clear visible-behind activity if it is top" into lmp-dev

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* commit '245645ca460150b4030d84c88faa931345a90a50':
  Don't clear visible-behind activity if it is top
This commit is contained in:
Craig Mautner
2014-10-01 17:52:57 +00:00
committed by Android Git Automerger
parent cdbda3e989 245645ca46
commit 9ab8fbbc60
2 changed files with 28 additions and 12 deletions
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30
core/java/android/app/Activity.java
View File

@@ -5466,27 +5466,33 @@ public class Activity extends ContextThemeWrapper
/**
* Activities that want to remain visible behind a translucent activity above them must call
* this method anytime before a return from {@link #onPause()}. If this call is successful
* then the activity will remain visible when {@link #onPause()} is called, and can continue to
* play media in the background, but it must stop playing and release resources prior to or
* within the call to {@link #onVisibleBehindCanceled()}. If this call returns false, the
* activity will not be visible in the background, and must release any media resources
* immediately.
* this method anytime between the start of {@link #onResume()} and the return from
* {@link #onPause()}. If this call is successful then the activity will remain visible after
* {@link #onPause()} is called, and is allowed to continue playing media in the background.
*
* <p>The actions of this call are reset each time that this activity is brought to the
* front. That is, every time {@link #onResume()} is called the activity will be assumed
* to not have requested visible behind. Therefore, if you want this activity to continue to
* be visible in the background you must call this method again.
*
* <p>Only fullscreen opaque activities may make this call. I.e. this call is a nop
* for dialog and translucent activities.
*
* <p>False will be returned any time this method is call between the return of onPause and
* <p>Under all circumstances, the activity must stop playing and release resources prior to or
* within a call to {@link #onVisibleBehindCanceled()} or if this call returns false.
*
* <p>False will be returned any time this method is called between the return of onPause and
* the next call to onResume.
*
* @param visible true to notify the system that the activity wishes to be visible behind other
* translucent activities, false to indicate otherwise. Resources must be
* released when passing false to this method.
* @return the resulting visibiity state. If true the activity may remain visible beyond
* {@link #onPause()}. If false then the activity may not count on being visible behind
* other translucent activities, and must stop any media playback and release resources.
* Returning false may occur in lieu of a call to onVisibleBehindCanceled() so the return
* value must be checked.
* @return the resulting visibiity state. If true the activity will remain visible beyond
* {@link #onPause()} if the next activity is translucent or not fullscreen. If false
* then the activity may not count on being visible behind other translucent activities,
* and must stop any media playback and release resources.
* Returning false may occur in lieu of a call to {@link #onVisibleBehindCanceled()} so
* the return value must be checked.
*
* @see #onVisibleBehindCanceled()
* @see #onBackgroundVisibleBehindChanged(boolean)

10
services/core/java/com/android/server/am/ActivityStack.java
View File

@@ -1105,6 +1105,11 @@ final class ActivityStack {
invalidateLastScreenshot();
}
next.returningOptions = null;
if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == next) {
// When resuming an activity, require it to call requestVisibleBehind() again.
mActivityContainer.mActivityDisplay.setVisibleBehindActivity(null);
}
}
private void setVisibile(ActivityRecord r, boolean visible) {
@@ -3296,6 +3301,11 @@ final class ActivityStack {
if (hasVisibleBehindActivity() &&
!mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) {
final ActivityRecord r = getVisibleBehindActivity();
if (r == topRunningActivityLocked(null)) {
// Don't release the top activity if it has requested to run behind the next
// activity.
return;
}
if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" +
mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app +
" thread=" + r.app.thread);