1 /*
2  * Copyright (C) 2009 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.wallpaper.livepicker;
18 
19 import android.app.WallpaperInfo;
20 import android.app.WallpaperManager;
21 import android.content.ComponentName;
22 import android.content.Intent;
23 import android.content.pm.PackageManager;
24 import android.content.pm.ResolveInfo;
25 import android.os.Parcelable;
26 import android.service.wallpaper.WallpaperService;
27 import android.util.Log;
28 
29 import org.xmlpull.v1.XmlPullParserException;
30 
31 import java.io.IOException;
32 import java.util.List;
33 
34 public class LiveWallpaperChange extends LiveWallpaperPreview {
35     private static final String TAG = "CHANGE_LIVE_WALLPAPER";
36 
37     @Override
init()38     protected void init() {
39         Parcelable obj = getIntent().getParcelableExtra(
40                 WallpaperManager.EXTRA_LIVE_WALLPAPER_COMPONENT);
41         if (obj == null || !(obj instanceof ComponentName)) {
42             Log.w(TAG, "No LIVE_WALLPAPER_COMPONENT extra supplied");
43             finish();
44             return;
45         }
46 
47         ComponentName comp = (ComponentName)obj;
48 
49         // Get the information about this component.  Implemented this way
50         // to not allow us to direct the caller to a service that is not a
51         // live wallpaper.
52         Intent queryIntent = new Intent(WallpaperService.SERVICE_INTERFACE);
53         queryIntent.setPackage(comp.getPackageName());
54         List<ResolveInfo> list = getPackageManager().queryIntentServices(
55                 queryIntent, PackageManager.GET_META_DATA);
56         if (list != null) {
57             for (int i=0; i<list.size(); i++) {
58                 ResolveInfo ri = list.get(i);
59                 if (ri.serviceInfo.name.equals(comp.getClassName())) {
60                     WallpaperInfo info;
61                     try {
62                         info = new WallpaperInfo(this, ri);
63                     } catch (XmlPullParserException|IOException e) {
64                         Log.w(TAG, "Bad wallpaper " + ri.serviceInfo, e);
65                         finish();
66                         return;
67                     }
68 
69                     initUI(info);
70                     return;
71                 }
72             }
73         }
74 
75         Log.w(TAG, "Not a live wallpaper: " + comp);
76         finish();
77     }
78 }
79