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.annotation.RequiresPermission;
20 import android.app.ActivityThread;
21 import android.app.WallpaperInfo;
22 import android.app.WallpaperManager;
23 import android.content.BroadcastReceiver;
24 import android.content.ComponentName;
25 import android.content.Context;
26 import android.content.Intent;
27 import android.graphics.Bitmap;
28 import android.os.AsyncTask;
29 import android.os.ParcelFileDescriptor;
30 import android.util.Slog;
31 
32 /**
33  * Receiver responsible for updating the wallpaper when the device
34  * configuration has changed.
35  *
36  * @hide
37  */
38 public class WallpaperUpdateReceiver extends BroadcastReceiver {
39 
40     private static final String TAG = "WallpaperUpdateReceiver";
41     private static final boolean DEBUG = false;
42 
43     @Override
onReceive(final Context context, final Intent intent)44     public void onReceive(final Context context, final Intent intent) {
45         if (DEBUG) Slog.d(TAG, "onReceive: " + intent);
46 
47         if (intent != null && Intent.ACTION_DEVICE_CUSTOMIZATION_READY.equals(intent.getAction())) {
48             AsyncTask.execute(this::updateWallpaper);
49         }
50     }
51 
updateWallpaper()52     private void updateWallpaper() {
53         try {
54             ActivityThread currentActivityThread = ActivityThread.currentActivityThread();
55             Context uiContext = currentActivityThread.getSystemUiContext();
56             WallpaperManager wallpaperManager = WallpaperManager.getInstance(uiContext);
57             if (isUserSetWallpaper(wallpaperManager, uiContext)) {
58                 Slog.i(TAG, "User has set wallpaper, skip to resetting");
59                 return;
60             }
61             if (DEBUG) Slog.d(TAG, "Set customized default_wallpaper.");
62             Bitmap blank = Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
63             // set a blank wallpaper to force a redraw of default_wallpaper
64             wallpaperManager.setBitmap(blank);
65             wallpaperManager.setResource(com.android.internal.R.drawable.default_wallpaper);
66         } catch (Exception e) {
67             Slog.w(TAG, "Failed to customize system wallpaper." + e);
68         }
69     }
70 
71     /**
72      * A function to validate if users have set customized (live)wallpaper
73      * <p>
74      * return true if users have customized their wallpaper
75      **/
76     @RequiresPermission(android.Manifest.permission.READ_WALLPAPER_INTERNAL)
isUserSetWallpaper(WallpaperManager wm, Context context)77     private boolean isUserSetWallpaper(WallpaperManager wm, Context context) {
78         WallpaperInfo info = wm.getWallpaperInfo();
79         if (info == null) {
80             //Image Wallpaper
81             ParcelFileDescriptor sysWallpaper =
82                     wm.getWallpaperFile(WallpaperManager.FLAG_SYSTEM);
83             ParcelFileDescriptor lockWallpaper =
84                     wm.getWallpaperFile(WallpaperManager.FLAG_LOCK);
85             if (sysWallpaper != null || lockWallpaper != null) {
86                 return true;
87             }
88         } else {
89             //live wallpaper
90             ComponentName currCN = info.getComponent();
91             ComponentName defaultCN = WallpaperManager.getCmfDefaultWallpaperComponent(context);
92             if (!currCN.equals(defaultCN)) {
93                 return true;
94             }
95         }
96         return false;
97     }
98 }
99