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Commit b9151187 authored by Garfield Tan's avatar Garfield Tan
Browse files

Preserve other windows during resize as well. 

Before this change if user resizes a window that has a dialog activity
in the front, and a paused activity in its back, the paused activity
will be completely torn down and relaunched, causing a whole period of
black window showing to users.

Bug: 110716902
Test: The activity stopped flickering and go/wm-smoke.

Change-Id: I0dfe6a9c3d925a365a1a3beaa5841e1606220ac2
parent 6d5bdf29

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

+7 −1
Original line number Diff line number Diff line
@@ -542,8 +542,14 @@ class TaskRecord extends ConfigurationContainer implements TaskWindowContainerLi 
                if (r != null && !deferResume) {

                    kept = r.ensureActivityConfiguration(0 /* globalChanges */,

                            preserveWindow);

                    // Preserve other windows for resizing because if resizing happens when there

                    // is a dialog activity in the front, the activity that still shows some

                    // content to the user will become black and cause flickers. Note in most cases

                    // this won't cause tons of irrelevant windows being preserved because only

                    // activities in this task may experience a bounds change. Configs for other

                    // activities stay the same.

                    mService.mStackSupervisor.ensureActivitiesVisibleLocked(r, 0,

                            !PRESERVE_WINDOWS);

                            preserveWindow);

                    if (!kept) {

                        mService.mStackSupervisor.resumeFocusedStackTopActivityLocked();

                    }