Fix 7216870: recents relaunches dismissed activity

Author: mikejurka

packages/SystemUI/src/com/android/systemui/recent/RecentsActivity.java

@@ -120,7 +120,7 @@ public void dismissAndGoBack() {
         if (mRecentsPanel != null) {
             final SystemUIApplication app = (SystemUIApplication) getApplication();
             final RecentTasksLoader recentTasksLoader = app.getRecentTasksLoader();
-            TaskDescription firstTask = recentTasksLoader.getFirstTask();
+            TaskDescription firstTask = mRecentsPanel.getBottomTask();
             if (firstTask != null && mRecentsPanel.simulateClick(firstTask)) {
                 // recents panel will take care of calling show(false);
                 return;

packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java

@@ -488,6 +488,24 @@ void onTaskThumbnailLoaded(TaskDescription td) {
         showIfReady();
     }
 
+    public TaskDescription getBottomTask() {
+        if (mRecentsContainer != null) {
+            ViewGroup container = mRecentsContainer;
+            if (container instanceof RecentsScrollView) {
+                container = (ViewGroup) container.findViewById(
+                        R.id.recents_linear_layout);
+            }
+            if (container.getChildCount() > 0) {
+                View v = container.getChildAt(container.getChildCount() - 1);
+                if (v.getTag() instanceof ViewHolder) {
+                    ViewHolder h = (ViewHolder)v.getTag();
+                    return h.taskDescription;
+                }
+            }
+        }
+        return null;
+    }
+
     public void clearRecentTasksList() {
         // Clear memory used by screenshots
         if (mRecentTaskDescriptions != null) {