5 files changed, 92 insertions, 0 deletions
diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index bf77f6e..eae3b1f 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -1734,6 +1734,22 @@ public abstract class ActivityManagerNative extends Binder implements IActivityM
             return true;
         }
 
+        case REGISTER_USER_SWITCH_OBSERVER_TRANSACTION: {
+            data.enforceInterface(IActivityManager.descriptor);
+            IUserSwitchObserver observer = IUserSwitchObserver.Stub.asInterface(
+                    data.readStrongBinder());
+            registerUserSwitchObserver(observer);
+            return true;
+        }
+
+        case UNREGISTER_USER_SWITCH_OBSERVER_TRANSACTION: {
+            data.enforceInterface(IActivityManager.descriptor);
+            IUserSwitchObserver observer = IUserSwitchObserver.Stub.asInterface(
+                    data.readStrongBinder());
+            unregisterUserSwitchObserver(observer);
+            return true;
+        }
+
         }
 
         return super.onTransact(code, data, reply, flags);
@@ -3955,5 +3971,27 @@ class ActivityManagerProxy implements IActivityManager
         return result;
     }
 
+    public void registerUserSwitchObserver(IUserSwitchObserver observer) throws RemoteException {
+        Parcel data = Parcel.obtain();
+        Parcel reply = Parcel.obtain();
+        data.writeInterfaceToken(IActivityManager.descriptor);
+        data.writeStrongBinder(observer != null ? observer.asBinder() : null);
+        mRemote.transact(REGISTER_USER_SWITCH_OBSERVER_TRANSACTION, data, reply, 0);
+        reply.readException();
+        data.recycle();
+        reply.recycle();
+    }
+
+    public void unregisterUserSwitchObserver(IUserSwitchObserver observer) throws RemoteException {
+        Parcel data = Parcel.obtain();
+        Parcel reply = Parcel.obtain();
+        data.writeInterfaceToken(IActivityManager.descriptor);
+        data.writeStrongBinder(observer != null ? observer.asBinder() : null);
+        mRemote.transact(UNREGISTER_USER_SWITCH_OBSERVER_TRANSACTION, data, reply, 0);
+        reply.readException();
+        data.recycle();
+        reply.recycle();
+    }
+
     private IBinder mRemote;
 }
diff --git a/core/java/android/app/IActivityManager.java b/core/java/android/app/IActivityManager.java
index 4c0e2a7..9ef375a 100644
--- a/core/java/android/app/IActivityManager.java
+++ b/core/java/android/app/IActivityManager.java
@@ -360,6 +360,9 @@ public interface IActivityManager extends IInterface {
     // manage your activity to make sure it is always the uid you expect.
     public int getLaunchedFromUid(IBinder activityToken) throws RemoteException;
 
+    public void registerUserSwitchObserver(IUserSwitchObserver observer) throws RemoteException;
+    public void unregisterUserSwitchObserver(IUserSwitchObserver observer) throws RemoteException;
+
     /*
      * Private non-Binder interfaces
      */
@@ -609,4 +612,6 @@ public interface IActivityManager extends IInterface {
     int IS_INTENT_SENDER_AN_ACTIVITY_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+151;
     int START_ACTIVITY_AS_USER_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+152;
     int STOP_USER_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+153;
+    int REGISTER_USER_SWITCH_OBSERVER_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+154;
+    int UNREGISTER_USER_SWITCH_OBSERVER_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+155;
 }
diff --git a/core/java/android/app/IUserSwitchObserver.aidl b/core/java/android/app/IUserSwitchObserver.aidl
new file mode 100644
index 0000000..845897b
--- /dev/null
+++ b/core/java/android/app/IUserSwitchObserver.aidl
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.app;
+
+import android.os.IRemoteCallback;
+
+/** {@hide} */
+oneway interface IUserSwitchObserver {
+    void onUserSwitching(int newUserId, IRemoteCallback reply);
+    void onUserSwitchComplete(int newUserId);
+}
diff --git a/core/java/android/app/IWallpaperManager.aidl b/core/java/android/app/IWallpaperManager.aidl
index 69f64a1..3efd3c0 100644
--- a/core/java/android/app/IWallpaperManager.aidl
+++ b/core/java/android/app/IWallpaperManager.aidl
@@ -52,6 +52,11 @@ interface IWallpaperManager {
     void clearWallpaper();
 
     /**
+     * Return whether there is a wallpaper set with the given name.
+     */
+    boolean hasNamedWallpaper(String name);
+
+    /**
      * Sets the dimension hint for the wallpaper. These hints indicate the desired
      * minimum width and height for the wallpaper.
      */
diff --git a/core/java/android/app/WallpaperManager.java b/core/java/android/app/WallpaperManager.java
index 1ad2e6d..9c0064e 100644
--- a/core/java/android/app/WallpaperManager.java
+++ b/core/java/android/app/WallpaperManager.java
@@ -590,6 +590,25 @@ public class WallpaperManager {
     }
 
     /**
+     * Return whether any users are currently set to use the wallpaper
+     * with the given resource ID.  That is, their wallpaper has been
+     * set through {@link #setResource(int)} with the same resource id.
+     */
+    public boolean hasResourceWallpaper(int resid) {
+        if (sGlobals.mService == null) {
+            Log.w(TAG, "WallpaperService not running");
+            return false;
+        }
+        try {
+            Resources resources = mContext.getResources();
+            String name = "res:" + resources.getResourceName(resid);
+            return sGlobals.mService.hasNamedWallpaper(name);
+        } catch (RemoteException e) {
+            return false;
+        }
+    }
+
+    /**
      * Returns the desired minimum width for the wallpaper. Callers of
      * {@link #setBitmap(android.graphics.Bitmap)} or
      * {@link #setStream(java.io.InputStream)} should check this value