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.wallpaper.livepicker;
18
19import android.app.WallpaperInfo;
20import android.content.Context;
21import android.content.Intent;
22import android.content.pm.PackageManager;
23import android.content.pm.ResolveInfo;
24import android.content.res.Resources;
25import android.graphics.Bitmap;
26import android.graphics.Canvas;
27import android.graphics.Paint;
28import android.graphics.drawable.BitmapDrawable;
29import android.graphics.drawable.Drawable;
30import android.os.AsyncTask;
31import android.service.wallpaper.WallpaperService;
32import android.text.Html;
33import android.util.Log;
34import android.view.Gravity;
35import android.view.LayoutInflater;
36import android.view.View;
37import android.view.ViewGroup;
38import android.widget.BaseAdapter;
39import android.widget.ImageView;
40import android.widget.ListAdapter;
41import android.widget.TextView;
42
43import org.xmlpull.v1.XmlPullParserException;
44
45import java.io.IOException;
46import java.text.Collator;
47import java.util.ArrayList;
48import java.util.Collections;
49import java.util.Comparator;
50import java.util.List;
51
52public class LiveWallpaperListAdapter extends BaseAdapter implements ListAdapter {
53    private static final String LOG_TAG = "LiveWallpaperListAdapter";
54
55    private final LayoutInflater mInflater;
56    private final PackageManager mPackageManager;
57
58    private List<LiveWallpaperInfo> mWallpapers;
59
60    @SuppressWarnings("unchecked")
61    public LiveWallpaperListAdapter(Context context) {
62        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
63        mPackageManager = context.getPackageManager();
64
65        List<ResolveInfo> list = mPackageManager.queryIntentServices(
66                new Intent(WallpaperService.SERVICE_INTERFACE),
67                PackageManager.GET_META_DATA);
68
69        mWallpapers = generatePlaceholderViews(list.size());
70
71        new LiveWallpaperEnumerator(context).execute(list);
72    }
73
74    private List<LiveWallpaperInfo> generatePlaceholderViews(int amount) {
75        ArrayList<LiveWallpaperInfo> list = new ArrayList<LiveWallpaperInfo>(amount);
76        for (int i = 0; i < amount; i++) {
77            LiveWallpaperInfo info = new LiveWallpaperInfo();
78            list.add(info);
79        }
80        return list;
81    }
82
83    public int getCount() {
84        if (mWallpapers == null) {
85            return 0;
86        }
87        return mWallpapers.size();
88    }
89
90    public Object getItem(int position) {
91        return mWallpapers.get(position);
92    }
93
94    public long getItemId(int position) {
95        return position;
96    }
97
98    public View getView(int position, View convertView, ViewGroup parent) {
99        ViewHolder holder;
100        if (convertView == null) {
101            convertView = mInflater.inflate(R.layout.live_wallpaper_entry, parent, false);
102
103            holder = new ViewHolder();
104            holder.title = (TextView) convertView.findViewById(R.id.title);
105            holder.thumbnail = (ImageView) convertView.findViewById(R.id.thumbnail);
106            convertView.setTag(holder);
107        } else {
108            holder = (ViewHolder) convertView.getTag();
109        }
110
111        LiveWallpaperInfo wallpaperInfo = mWallpapers.get(position);
112        if (holder.thumbnail != null) {
113            holder.thumbnail.setImageDrawable(wallpaperInfo.thumbnail);
114        }
115
116        if (holder.title != null && wallpaperInfo.info != null) {
117            holder.title.setText(wallpaperInfo.info.loadLabel(mPackageManager));
118            if (holder.thumbnail == null) {
119                holder.title.setCompoundDrawablesWithIntrinsicBounds(null, wallpaperInfo.thumbnail,
120                    null, null);
121            }
122        }
123
124        return convertView;
125    }
126
127    public class LiveWallpaperInfo {
128        public Drawable thumbnail;
129        public WallpaperInfo info;
130    }
131
132    private class ViewHolder {
133        TextView title;
134        ImageView thumbnail;
135    }
136
137    private class LiveWallpaperEnumerator extends
138            AsyncTask<List<ResolveInfo>, LiveWallpaperInfo, Void> {
139        private Context mContext;
140        private int mWallpaperPosition;
141
142        public LiveWallpaperEnumerator(Context context) {
143            super();
144            mContext = context;
145            mWallpaperPosition = 0;
146        }
147
148        @Override
149        protected Void doInBackground(List<ResolveInfo>... params) {
150            final PackageManager packageManager = mContext.getPackageManager();
151
152            List<ResolveInfo> list = params[0];
153
154            final Resources res = mContext.getResources();
155            BitmapDrawable galleryIcon = (BitmapDrawable) res.getDrawable(
156                    R.drawable.livewallpaper_placeholder);
157            Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);
158            paint.setTextAlign(Paint.Align.CENTER);
159            Canvas canvas = new Canvas();
160
161            Collections.sort(list, new Comparator<ResolveInfo>() {
162                final Collator mCollator;
163
164                {
165                    mCollator = Collator.getInstance();
166                }
167
168                public int compare(ResolveInfo info1, ResolveInfo info2) {
169                    return mCollator.compare(info1.loadLabel(packageManager),
170                            info2.loadLabel(packageManager));
171                }
172            });
173
174            for (ResolveInfo resolveInfo : list) {
175                WallpaperInfo info = null;
176                try {
177                    info = new WallpaperInfo(mContext, resolveInfo);
178                } catch (XmlPullParserException e) {
179                    Log.w(LOG_TAG, "Skipping wallpaper " + resolveInfo.serviceInfo, e);
180                    continue;
181                } catch (IOException e) {
182                    Log.w(LOG_TAG, "Skipping wallpaper " + resolveInfo.serviceInfo, e);
183                    continue;
184                }
185
186                LiveWallpaperInfo wallpaper = new LiveWallpaperInfo();
187                wallpaper.info = info;
188
189                Drawable thumb = info.loadThumbnail(packageManager);
190                if (thumb == null) {
191                    int thumbWidth = res.getDimensionPixelSize(
192                            R.dimen.live_wallpaper_thumbnail_width);
193                    int thumbHeight = res.getDimensionPixelSize(
194                            R.dimen.live_wallpaper_thumbnail_height);
195
196                    Bitmap thumbnail = Bitmap.createBitmap(thumbWidth, thumbHeight,
197                            Bitmap.Config.ARGB_8888);
198
199                    paint.setColor(res.getColor(R.color.live_wallpaper_thumbnail_background));
200                    canvas.setBitmap(thumbnail);
201                    canvas.drawPaint(paint);
202
203                    galleryIcon.setBounds(0, 0, thumbWidth, thumbHeight);
204                    galleryIcon.setGravity(Gravity.CENTER);
205                    galleryIcon.draw(canvas);
206
207                    String title = info.loadLabel(packageManager).toString();
208
209                    paint.setColor(res.getColor(R.color.live_wallpaper_thumbnail_text_color));
210                    paint.setTextSize(
211                            res.getDimensionPixelSize(R.dimen.live_wallpaper_thumbnail_text_size));
212
213                    canvas.drawText(title, (int) (thumbWidth * 0.5),
214                            thumbHeight - res.getDimensionPixelSize(
215                                    R.dimen.live_wallpaper_thumbnail_text_offset), paint);
216
217                    thumb = new BitmapDrawable(res, thumbnail);
218                }
219                wallpaper.thumbnail = thumb;
220                publishProgress(wallpaper);
221            }
222
223            return null;
224        }
225
226        @Override
227        protected void onProgressUpdate(LiveWallpaperInfo...infos) {
228            for (LiveWallpaperInfo info : infos) {
229                info.thumbnail.setDither(true);
230                if (mWallpaperPosition < mWallpapers.size()) {
231                    mWallpapers.set(mWallpaperPosition, info);
232                } else {
233                    mWallpapers.add(info);
234                }
235                mWallpaperPosition++;
236                LiveWallpaperListAdapter.this.notifyDataSetChanged();
237            }
238        }
239    }
240}
241