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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 
     22 import com.android.gallery3d.data.DataManager;
     23 import com.android.gallery3d.data.DownloadCache;
     24 import com.android.gallery3d.data.ImageCacheService;
     25 import com.android.gallery3d.gadget.WidgetUtils;
     26 import com.android.gallery3d.picasasource.PicasaSource;
     27 import com.android.gallery3d.util.GalleryUtils;
     28 import com.android.gallery3d.util.ThreadPool;
     29 
     30 import java.io.File;
     31 
     32 public class GalleryAppImpl extends Application implements GalleryApp {
     33 
     34     private static final String DOWNLOAD_FOLDER = "download";
     35     private static final long DOWNLOAD_CAPACITY = 64 * 1024 * 1024; // 64M
     36 
     37     private ImageCacheService mImageCacheService;
     38     private Object mLock = new Object();
     39     private DataManager mDataManager;
     40     private ThreadPool mThreadPool;
     41     private DownloadCache mDownloadCache;
     42 
     43     @Override
     44     public void onCreate() {
     45         super.onCreate();
     46         com.android.camera.Util.initialize(this);
     47         GalleryUtils.initialize(this);
     48         WidgetUtils.initialize(this);
     49         PicasaSource.initialize(this);
     50     }
     51 
     52     public Context getAndroidContext() {
     53         return this;
     54     }
     55 
     56     public synchronized DataManager getDataManager() {
     57         if (mDataManager == null) {
     58             mDataManager = new DataManager(this);
     59             mDataManager.initializeSourceMap();
     60         }
     61         return mDataManager;
     62     }
     63 
     64     public ImageCacheService getImageCacheService() {
     65         // This method may block on file I/O so a dedicated lock is needed here.
     66         synchronized (mLock) {
     67             if (mImageCacheService == null) {
     68                 mImageCacheService = new ImageCacheService(getAndroidContext());
     69             }
     70             return mImageCacheService;
     71         }
     72     }
     73 
     74     public synchronized ThreadPool getThreadPool() {
     75         if (mThreadPool == null) {
     76             mThreadPool = new ThreadPool();
     77         }
     78         return mThreadPool;
     79     }
     80 
     81     public synchronized DownloadCache getDownloadCache() {
     82         if (mDownloadCache == null) {
     83             File cacheDir = new File(getExternalCacheDir(), DOWNLOAD_FOLDER);
     84 
     85             if (!cacheDir.isDirectory()) cacheDir.mkdirs();
     86 
     87             if (!cacheDir.isDirectory()) {
     88                 throw new RuntimeException(
     89                         "fail to create: " + cacheDir.getAbsolutePath());
     90             }
     91             mDownloadCache = new DownloadCache(this, cacheDir, DOWNLOAD_CAPACITY);
     92         }
     93         return mDownloadCache;
     94     }
     95 }
     96