WidgetService.java revision d6db8eab6df048b9065834113a6d46a885af01d3 
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
17package com.android.gallery3d.gadget;
18
19import com.android.gallery3d.R;
20import com.android.gallery3d.app.GalleryApp;
21import com.android.gallery3d.data.ContentListener;
22import com.android.gallery3d.data.DataManager;
23import com.android.gallery3d.data.MediaSet;
24import com.android.gallery3d.data.Path;
25
26import android.appwidget.AppWidgetManager;
27import android.content.Intent;
28import android.graphics.Bitmap;
29import android.net.Uri;
30import android.widget.RemoteViews;
31import android.widget.RemoteViewsService;
32
33public class WidgetService extends RemoteViewsService {
34
35    @SuppressWarnings("unused")
36    private static final String TAG = "GalleryAppWidgetService";
37
38    public static final String EXTRA_WIDGET_TYPE = "widget-type";
39    public static final String EXTRA_ALBUM_PATH = "album-path";
40
41    @Override
42    public RemoteViewsFactory onGetViewFactory(Intent intent) {
43        int id = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
44                AppWidgetManager.INVALID_APPWIDGET_ID);
45        int type = intent.getIntExtra(EXTRA_WIDGET_TYPE, 0);
46        String albumPath = intent.getStringExtra(EXTRA_ALBUM_PATH);
47
48        return new PhotoRVFactory((GalleryApp) getApplicationContext(),
49                id, type, albumPath);
50    }
51
52    private static class EmptySource implements WidgetSource {
53
54        @Override
55        public int size() {
56            return 0;
57        }
58
59        @Override
60        public Bitmap getImage(int index) {
61            throw new UnsupportedOperationException();
62        }
63
64        @Override
65        public Uri getContentUri(int index) {
66            throw new UnsupportedOperationException();
67        }
68
69        @Override
70        public void setContentListener(ContentListener listener) {}
71
72        @Override
73        public void reload() {}
74
75        @Override
76        public void close() {}
77    }
78
79    private static class PhotoRVFactory implements
80            RemoteViewsService.RemoteViewsFactory, ContentListener {
81
82        private final int mAppWidgetId;
83        private final int mType;
84        private final String mAlbumPath;
85        private final GalleryApp mApp;
86
87        private WidgetSource mSource;
88
89        public PhotoRVFactory(GalleryApp app, int id, int type, String albumPath) {
90            mApp = app;
91            mAppWidgetId = id;
92            mType = type;
93            mAlbumPath = albumPath;
94        }
95
96        @Override
97        public void onCreate() {
98            if (mType == WidgetDatabaseHelper.TYPE_ALBUM) {
99                Path path = Path.fromString(mAlbumPath);
100                DataManager manager = mApp.getDataManager();
101                MediaSet mediaSet = (MediaSet) manager.getMediaObject(path);
102                mSource = mediaSet == null
103                        ? new EmptySource()
104                        : new MediaSetSource(mediaSet);
105            } else {
106                mSource = new LocalPhotoSource(mApp.getAndroidContext());
107            }
108            mSource.setContentListener(this);
109            AppWidgetManager.getInstance(mApp.getAndroidContext())
110                    .notifyAppWidgetViewDataChanged(
111                    mAppWidgetId, R.id.appwidget_stack_view);
112        }
113
114        @Override
115        public void onDestroy() {
116            mSource.close();
117            mSource = null;
118        }
119
120        public int getCount() {
121            return mSource.size();
122        }
123
124        public long getItemId(int position) {
125            return position;
126        }
127
128        public int getViewTypeCount() {
129            return 1;
130        }
131
132        public boolean hasStableIds() {
133            return true;
134        }
135
136        public RemoteViews getLoadingView() {
137            RemoteViews rv = new RemoteViews(
138                    mApp.getAndroidContext().getPackageName(),
139                    R.layout.appwidget_loading_item);
140            rv.setProgressBar(R.id.appwidget_loading_item, 0, 0, true);
141            return rv;
142        }
143
144        public RemoteViews getViewAt(int position) {
145            Bitmap bitmap = mSource.getImage(position);
146            if (bitmap == null) return getLoadingView();
147            RemoteViews views = new RemoteViews(
148                    mApp.getAndroidContext().getPackageName(),
149                    R.layout.appwidget_photo_item);
150            views.setImageViewBitmap(R.id.appwidget_photo_item, bitmap);
151            views.setOnClickFillInIntent(R.id.appwidget_photo_item, new Intent()
152                    .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
153                    .setData(mSource.getContentUri(position)));
154            return views;
155        }
156
157        @Override
158        public void onDataSetChanged() {
159            mSource.reload();
160        }
161
162        @Override
163        public void onContentDirty() {
164            AppWidgetManager.getInstance(mApp.getAndroidContext())
165                    .notifyAppWidgetViewDataChanged(
166                    mAppWidgetId, R.id.appwidget_stack_view);
167        }
168    }
169}
170