1 /*
2  * Copyright (C) 2010 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.gallery3d.app;
18 
19 import android.app.IntentService;
20 import android.content.BroadcastReceiver;
21 import android.content.Context;
22 import android.content.Intent;
23 import android.content.SharedPreferences;
24 import android.preference.PreferenceManager;
25 
26 import com.android.gallery3d.picasasource.PicasaSource;
27 import com.android.gallery3d.util.LightCycleHelper;
28 
29 public class PackagesMonitor extends BroadcastReceiver {
30     public static final String KEY_PACKAGES_VERSION  = "packages-version";
31 
getPackagesVersion(Context context)32     public synchronized static int getPackagesVersion(Context context) {
33         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
34         return prefs.getInt(KEY_PACKAGES_VERSION, 1);
35     }
36 
37     @Override
onReceive(final Context context, final Intent intent)38     public void onReceive(final Context context, final Intent intent) {
39         intent.setClass(context, AsyncService.class);
40         context.startService(intent);
41     }
42 
43     public static class AsyncService extends IntentService {
AsyncService()44         public AsyncService() {
45             super("GalleryPackagesMonitorAsync");
46         }
47 
48         @Override
onHandleIntent(Intent intent)49         protected void onHandleIntent(Intent intent) {
50             onReceiveAsync(this, intent);
51         }
52     }
53 
54     // Runs in a background thread.
onReceiveAsync(Context context, Intent intent)55     private static void onReceiveAsync(Context context, Intent intent) {
56         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
57 
58         int version = prefs.getInt(KEY_PACKAGES_VERSION, 1);
59         prefs.edit().putInt(KEY_PACKAGES_VERSION, version + 1).commit();
60 
61         String action = intent.getAction();
62         String packageName = intent.getData().getSchemeSpecificPart();
63         if (Intent.ACTION_PACKAGE_ADDED.equals(action)) {
64             PicasaSource.onPackageAdded(context, packageName);
65         } else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) {
66             PicasaSource.onPackageRemoved(context, packageName);
67         } else if (Intent.ACTION_PACKAGE_CHANGED.equals(action)) {
68             PicasaSource.onPackageChanged(context, packageName);
69         }
70     }
71 }
72