Only show launcher for the bottom activity in a task

When transitioning from activity-over-launcher to task-over-launcher
ensureActivitiesVisibleLocked() was too aggressive in showing the
launcher. If there were any non-fullscreen activities in a task that
sits over the launcher then the launcher would be shown.

This fix adds a test to make sure the launcher will only be shown if
the bottommost activity in such a task is non-fullscreen.

Fixes bug 10840919.

Change-Id: I5dcd63be3fa2865ae38cbb921332937dfa4b5d47

1 files changed, 1 insertions, 1 deletions

diff --git a/services/java/com/android/server/am/ActivityStack.java b/services/java/com/android/server/am/ActivityStack.java
index c31c213..8ee4b30 100644
--- a/services/java/com/android/server/am/ActivityStack.java
+++ b/services/java/com/android/server/am/ActivityStack.java
@@ -1084,7 +1084,7 @@ final class ActivityStack {
                         // At this point, nothing else needs to be shown
                         if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r);
                         behindFullscreen = true;
-                    } else if (task.mOnTopOfHome) {
+                    } else if (task.mActivities.indexOf(r) == 0 && task.mOnTopOfHome) {
                         if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r);
                         showHomeBehindStack = true;
                         behindFullscreen = true;