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