Close notification view when swiping away the last notification.

If the user swiped away all swipable notifications, chances are high he
expanded the notification area just for doing so.

Author: maniac103

packages/SystemUI/src/com/android/systemui/statusbar/NotificationData.java

@@ -35,6 +35,7 @@ public static final class Entry {
         public View row; // the outer expanded view
         public View content; // takes the click events and sends the PendingIntent
         public View expanded; // the inflated RemoteViews
+        public boolean cancelled;
     }
     private final ArrayList<Entry> mEntries = new ArrayList<Entry>();
 
@@ -66,6 +67,7 @@ public int add(IBinder key, StatusBarNotification notification, View row, View c
         entry.content = content;
         entry.expanded = expanded;
         entry.icon = icon;
+        entry.cancelled = false;
         final int index = chooseIndex(notification.notification.when);
         mEntries.add(index, entry);
         return index;

packages/SystemUI/src/com/android/systemui/statusbar/StatusBarService.java

@@ -716,7 +716,7 @@ private int chooseIconIndex(boolean isOngoing, int viewIndex) {
         }
     }
 
-    View[] makeNotificationView(final StatusBarNotification notification, ViewGroup parent) {
+    View[] makeNotificationView(final IBinder key, final StatusBarNotification notification, ViewGroup parent) {
         Notification n = notification.notification;
         RemoteViews remoteViews = n.contentView;
         if (remoteViews == null) {
@@ -731,7 +731,12 @@ View[] makeNotificationView(final StatusBarNotification notification, ViewGroup
                 public void run() {
                     try {
                         mBarService.onNotificationClear(notification.pkg, notification.tag, notification.id);
-                    } catch (RemoteException e) {
+
+                        int index = mLatest.findEntry(key);
+                        if (index >= 0) {
+                            mLatest.getEntryAt(index).cancelled = true;
+                        }
+                     } catch (RemoteException e) {
                         // Skip it, don't crash.
                     }
                 }
@@ -780,7 +785,7 @@ StatusBarIconView addNotificationViews(IBinder key, StatusBarNotification notifi
             parent = mLatestItems;
         }
         // Construct the expanded view.
-        final View[] views = makeNotificationView(notification, parent);
+        final View[] views = makeNotificationView(key, notification, parent);
         if (views == null) {
             handleNotificationError(key, notification, "Couldn't expand RemoteViews for: "
                     + notification);
@@ -821,6 +826,10 @@ StatusBarNotification removeNotificationViews(IBinder key) {
         // Remove the icon.
         ((ViewGroup)entry.icon.getParent()).removeView(entry.icon);
 
+        if (entry.cancelled && !mLatest.hasClearableItems()) {
+            animateCollapse();
+        }
+
         return entry.notification;
     }