Commit 701214b2 authored Apr 07, 2016 by Andrii Kulian

Fix multiple configuration changes in multiwindow

When in split-screen mode and activity handles configuration changes
it gets 2 onConfigurationChanged calls which originate from
ActivityManagerService#updateConfigurationLocked:
1. app.thread.scheduleConfigurationChanged calls to all process records
   send configuration of the whole screen for corresponding orientation,
   which leads to CONFIGURATION_CHANGED message in ActivityThread.
2. mStackSupervisor.resizeStackLocked call resizes both visible stacks and
   eventually ActivityThread receives ACTIVITY_CONFIGURATION_CHANGED
   message with correct configuration corresponding to space occupied in
   split-screen.

In this CL if component callback is an instance of Activity and it had
override config set - onConfigurationChanged will not be triggered unless
override config has changed.

Bug: 27948331
Change-Id: Ia73b045570b44eb5b351811bf6c4f63d78c3f909

parent b4e39f5b

core/java/android/app/ActivityThread.java

+10 −2

Original line number	Diff line number	Diff line
		@@ -4727,8 +4727,16 @@ public final class ActivityThread {
		if (callbacks != null) {
		final int N = callbacks.size();
		for (int i=0; i<N; i++) {
		performConfigurationChanged(callbacks.get(i), null, config, null,
		REPORT_TO_ACTIVITY);
		ComponentCallbacks2 cb = callbacks.get(i);
		if (cb instanceof Activity) {
		// If callback is an Activity - call corresponding method to consider override
		// config and avoid onConfigurationChanged if it hasn't changed.
		Activity a = (Activity) cb;
		performConfigurationChangedForActivity(mActivities.get(a.getActivityToken()),
		config, REPORT_TO_ACTIVITY);
		} else {
		performConfigurationChanged(cb, null, config, null, REPORT_TO_ACTIVITY);
		}
		}
		}
		}