GalleryAppImpl.java revision 4b4dbd225685502f4249c2bf25bf74f7ce526645 
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.app;
18
19import android.app.Application;
20import android.content.ComponentName;
21import android.content.Context;
22import android.content.pm.PackageManager;
23import android.os.AsyncTask;
24
25import com.android.gallery3d.common.ApiHelper;
26import com.android.gallery3d.data.DataManager;
27import com.android.gallery3d.data.DownloadCache;
28import com.android.gallery3d.data.ImageCacheService;
29import com.android.gallery3d.gadget.WidgetUtils;
30import com.android.gallery3d.photoeditor.PhotoEditor;
31import com.android.gallery3d.picasasource.PicasaSource;
32import com.android.gallery3d.util.GalleryUtils;
33import com.android.gallery3d.util.LightCycleHelper;
34import com.android.gallery3d.util.ThreadPool;
35
36import java.io.File;
37
38public class GalleryAppImpl extends Application implements GalleryApp {
39
40    private static final String DOWNLOAD_FOLDER = "download";
41    private static final long DOWNLOAD_CAPACITY = 64 * 1024 * 1024; // 64M
42
43    private ImageCacheService mImageCacheService;
44    private Object mLock = new Object();
45    private DataManager mDataManager;
46    private ThreadPool mThreadPool;
47    private DownloadCache mDownloadCache;
48    private StitchingProgressManager mStitchingProgressManager;
49
50    @Override
51    public void onCreate() {
52        super.onCreate();
53        com.android.camera.Util.initialize(this);
54        initializeAsyncTask();
55        GalleryUtils.initialize(this);
56        WidgetUtils.initialize(this);
57        PicasaSource.initialize(this);
58        int state = ApiHelper.ENABLE_PHOTO_EDITOR
59                ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
60                : PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
61        getPackageManager().setComponentEnabledSetting(
62                new ComponentName(this, PhotoEditor.class),
63                state, PackageManager.DONT_KILL_APP);
64
65        mStitchingProgressManager = LightCycleHelper.createStitchingManagerInstance(this);
66        mStitchingProgressManager.addChangeListener(getDataManager());
67    }
68
69    @Override
70    public Context getAndroidContext() {
71        return this;
72    }
73
74    @Override
75    public synchronized DataManager getDataManager() {
76        if (mDataManager == null) {
77            mDataManager = new DataManager(this);
78            mDataManager.initializeSourceMap();
79        }
80        return mDataManager;
81    }
82
83    @Override
84    public StitchingProgressManager getStitchingProgressManager() {
85        return mStitchingProgressManager;
86    }
87
88    @Override
89    public ImageCacheService getImageCacheService() {
90        // This method may block on file I/O so a dedicated lock is needed here.
91        synchronized (mLock) {
92            if (mImageCacheService == null) {
93                mImageCacheService = new ImageCacheService(getAndroidContext());
94            }
95            return mImageCacheService;
96        }
97    }
98
99    @Override
100    public synchronized ThreadPool getThreadPool() {
101        if (mThreadPool == null) {
102            mThreadPool = new ThreadPool();
103        }
104        return mThreadPool;
105    }
106
107    @Override
108    public synchronized DownloadCache getDownloadCache() {
109        if (mDownloadCache == null) {
110            File cacheDir = new File(getExternalCacheDir(), DOWNLOAD_FOLDER);
111
112            if (!cacheDir.isDirectory()) cacheDir.mkdirs();
113
114            if (!cacheDir.isDirectory()) {
115                throw new RuntimeException(
116                        "fail to create: " + cacheDir.getAbsolutePath());
117            }
118            mDownloadCache = new DownloadCache(this, cacheDir, DOWNLOAD_CAPACITY);
119        }
120        return mDownloadCache;
121    }
122
123    private void initializeAsyncTask() {
124        // AsyncTask class needs to be loaded in UI thread.
125        // So we load it here to comply the rule.
126        try {
127            Class.forName(AsyncTask.class.getName());
128        } catch (ClassNotFoundException e) {
129        }
130    }
131}
132