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Commit 17690ffc authored by Skuhne's avatar Skuhne
Browse files

Dont update thumbnails of freeform windows on focus change 

Windows should not update their thumbnails upon a focus change since
it costs a lot of time to capture the content and the thumbnail would
be outdated short time later anyways since the window is still
visible anyways.

Bug: 23562904
Change-Id: If5d23a1058e83030770905827d682f649a579f7a
parent 306a1d22

services/core/java/com/android/server/am/ActivityStack.java

+8 −1
Original line number Diff line number Diff line
@@ -902,7 +902,14 @@ final class ActivityStack { 
        prev.task.touchActiveTime();

        clearLaunchTime(prev);

        final ActivityRecord next = mStackSupervisor.topRunningActivityLocked();

        if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) {

        // In freeform mode we only update the thumbnail when there is no thumbnail yet since every

        // focus change will request a thumbnail to be taken.

        // Note furthermore that since windows can change their content in freeform mode all the

        // time a thumbnail is possibly constantly outdated.

        if (mService.mHasRecents &&

                (next == null || next.noDisplay || next.task != prev.task || uiSleeping) &&

                (!prev.task.hasThumbnail() ||

                        prev.task.stack.mStackId != FREEFORM_WORKSPACE_STACK_ID)) {

            prev.updateThumbnailLocked(screenshotActivities(prev), null);

        }

        stopFullyDrawnTraceIfNeeded();

services/core/java/com/android/server/am/TaskRecord.java

+8 −0
Original line number Diff line number Diff line
@@ -477,6 +477,14 @@ final class TaskRecord { 
        setNextAffiliate(null);

    }



    /**

     * Returns true when we have a thumbnail.

     * @return Returns true if there is a thumbnail.

     */

    boolean hasThumbnail() {

        return mLastThumbnail != null;

    }



    /**

     * Sets the last thumbnail.

     * @return whether the thumbnail was set