1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.server;
18 
19 import android.app.ActivityThread;
20 import android.app.WallpaperManager;
21 import android.content.BroadcastReceiver;
22 import android.content.Context;
23 import android.content.Intent;
24 import android.graphics.Bitmap;
25 import android.os.AsyncTask;
26 import android.util.Slog;
27 
28 /**
29  * Receiver responsible for updating the wallpaper when the device
30  * configuration has changed.
31  *
32  * @hide
33  */
34 public class WallpaperUpdateReceiver extends BroadcastReceiver {
35 
36     private static final String TAG = "WallpaperUpdateReceiver";
37     private static final boolean DEBUG = false;
38 
39     @Override
onReceive(final Context context, final Intent intent)40     public void onReceive(final Context context, final Intent intent) {
41         if (DEBUG) Slog.d(TAG, "onReceive: " + intent);
42 
43         if (intent != null && Intent.ACTION_DEVICE_CUSTOMIZATION_READY.equals(intent.getAction())) {
44             AsyncTask.execute(this::updateWallpaper);
45         }
46     }
47 
updateWallpaper()48     private void updateWallpaper() {
49         try {
50             ActivityThread currentActivityThread = ActivityThread.currentActivityThread();
51             Context uiContext = currentActivityThread.getSystemUiContext();
52             WallpaperManager wallpaperManager = WallpaperManager.getInstance(uiContext);
53             if (DEBUG) Slog.d(TAG, "Set customized default_wallpaper.");
54             Bitmap blank = Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
55             // set a blank wallpaper to force a redraw of default_wallpaper
56             wallpaperManager.setBitmap(blank);
57             wallpaperManager.setResource(com.android.internal.R.drawable.default_wallpaper);
58         } catch (Exception e) {
59             Slog.w(TAG, "Failed to customize system wallpaper." + e);
60         }
61     }
62 }
63