Add tap detector for switching stack focus.

- New InputEventReceiver for detecting taps outside of focused stack
boundaries.
- Fixed bug that wasn't pausing the non-focused window when returning
home.

Change-Id: Ia51d312a7c029abc01eb5df1102814cc29d33b47

1 files changed, 44 insertions, 4 deletions

diff --git a/services/java/com/android/server/am/ActivityStackSupervisor.java b/services/java/com/android/server/am/ActivityStackSupervisor.java
index af358c2..89b0ff2 100644
--- a/services/java/com/android/server/am/ActivityStackSupervisor.java
+++ b/services/java/com/android/server/am/ActivityStackSupervisor.java
@@ -216,10 +216,6 @@ public class ActivityStackSupervisor {
         return !(stack.isHomeStack() ^ getFocusedStack().isHomeStack());
     }
 
-    boolean homeIsInFront() {
-        return isFrontStack(mHomeStack);
-    }
-
     void moveHomeStack(boolean toFront) {
         final boolean homeInFront = isFrontStack(mHomeStack);
         if (homeInFront ^ toFront) {
@@ -390,6 +386,18 @@ public class ActivityStackSupervisor {
         return true;
     }
 
+    boolean pauseBackStacks(boolean userLeaving) {
+        boolean someActivityPaused = false;
+        for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
+            final ActivityStack stack = mStacks.get(stackNdx);
+            if (!isFrontStack(stack) && stack.mResumedActivity != null) {
+                stack.startPausingLocked(userLeaving, false);
+                someActivityPaused = true;
+            }
+        }
+        return someActivityPaused;
+    }
+
     boolean allPausedActivitiesComplete() {
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             final ActivityStack stack = mStacks.get(stackNdx);
@@ -1983,6 +1991,38 @@ public class ActivityStackSupervisor {
         return stops;
     }
 
+    void validateTopActivitiesLocked() {
+        for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
+            final ActivityStack stack = mStacks.get(stackNdx);
+            final ActivityRecord r = stack.topRunningActivityLocked(null);
+            if (isFrontStack(stack)) {
+                if (r == null) {
+                    Slog.e(TAG, "validateTop...: null top activity, stack=" + stack);
+                } else {
+                    if (stack.mPausingActivity != null) {
+                        Slog.e(TAG, "validateTop...: top stack has pausing activity r=" + r +
+                            " state=" + r.state);
+                    }
+                    if (r.state != ActivityState.INITIALIZING &&
+                            r.state != ActivityState.RESUMED) {
+                        Slog.e(TAG, "validateTop...: activity in front not resumed r=" + r +
+                                " state=" + r.state);
+                    }
+                }
+            } else {
+                if (stack.mResumedActivity != null) {
+                    Slog.e(TAG, "validateTop...: back stack has resumed activity r=" + r +
+                        " state=" + r.state);
+                }
+                if (r != null && (r.state == ActivityState.INITIALIZING
+                        || r.state == ActivityState.RESUMED)) {
+                    Slog.e(TAG, "validateTop...: activity in back resumed r=" + r +
+                            " state=" + r.state);
+                }
+            }
+        }
+    }
+
     public void dump(PrintWriter pw, String prefix) {
         pw.print(prefix); pw.print("mDismissKeyguardOnNextActivity:");
                 pw.println(mDismissKeyguardOnNextActivity);