Merge "Avoid adjusting top focused root task while clear task"

services/core/java/com/android/server/wm/ActivityRecord.java

@@ -2549,7 +2549,9 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
 
         final Task stack = getRootTask();
         final boolean mayAdjustTop = (isState(RESUMED) || stack.mResumedActivity == null)
-                && stack.isFocusedStackOnDisplay();
+                && stack.isFocusedStackOnDisplay()
+                // Do not adjust focus task because the task will be reused to launch new activity.
+                && !task.isClearingToReuseTask();
         final boolean shouldAdjustGlobalFocus = mayAdjustTop
                 // It must be checked before {@link #makeFinishingLocked} is called, because a stack
                 // is not visible if it only contains finishing activities.

services/core/java/com/android/server/wm/ActivityStarter.java

@@ -2023,8 +2023,6 @@ class ActivityStarter {
             // of history or if it is finished immediately), thus disassociating the task. Also note
             // that mReuseTask is reset as a result of {@link Task#performClearTaskLocked}
             // launching another activity.
-            // TODO(b/36119896):  We shouldn't trigger activity launches in this path since we are
-            // already launching one.
             targetTask.performClearTaskLocked();
             targetTask.setIntent(mStartActivity);
             mAddingToTask = true;

services/core/java/com/android/server/wm/Task.java

@@ -1836,14 +1836,25 @@ class Task extends WindowContainer<WindowContainer> {
      */
     void performClearTaskLocked() {
         mReuseTask = true;
-        performClearTask("clear-task-all");
-        mReuseTask = false;
+        mStackSupervisor.beginDeferResume();
+        try {
+            performClearTask("clear-task-all");
+        } finally {
+            mStackSupervisor.endDeferResume();
+            mReuseTask = false;
+        }
     }
 
     ActivityRecord performClearTaskForReuseLocked(ActivityRecord newR, int launchFlags) {
         mReuseTask = true;
-        final ActivityRecord result = performClearTaskLocked(newR, launchFlags);
-        mReuseTask = false;
+        mStackSupervisor.beginDeferResume();
+        final ActivityRecord result;
+        try {
+            result = performClearTaskLocked(newR, launchFlags);
+        } finally {
+            mStackSupervisor.endDeferResume();
+            mReuseTask = false;
+        }
         return result;
     }