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      1 /*
      2  * Copyright (C) 2013 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.documentsui;
     18 
     19 import android.app.ActivityManager;
     20 import android.app.Application;
     21 import android.content.BroadcastReceiver;
     22 import android.content.ContentProviderClient;
     23 import android.content.ContentResolver;
     24 import android.content.Context;
     25 import android.content.Intent;
     26 import android.content.IntentFilter;
     27 import android.net.Uri;
     28 import android.os.RemoteException;
     29 import android.text.format.DateUtils;
     30 
     31 import com.android.documentsui.base.Lookup;
     32 import com.android.documentsui.clipping.ClipStorage;
     33 import com.android.documentsui.clipping.ClipStore;
     34 import com.android.documentsui.clipping.DocumentClipper;
     35 import com.android.documentsui.roots.ProvidersCache;
     36 
     37 public class DocumentsApplication extends Application {
     38     private static final long PROVIDER_ANR_TIMEOUT = 20 * DateUtils.SECOND_IN_MILLIS;
     39 
     40     private ProvidersCache mProviders;
     41     private ThumbnailCache mThumbnailCache;
     42     private ClipStorage mClipStore;
     43     private DocumentClipper mClipper;
     44     private DragAndDropManager mDragAndDropManager;
     45     private Lookup<String, String> mFileTypeLookup;
     46 
     47     public static ProvidersCache getProvidersCache(Context context) {
     48         return ((DocumentsApplication) context.getApplicationContext()).mProviders;
     49     }
     50 
     51     public static ThumbnailCache getThumbnailCache(Context context) {
     52         final DocumentsApplication app = (DocumentsApplication) context.getApplicationContext();
     53         return app.mThumbnailCache;
     54     }
     55 
     56     public static ContentProviderClient acquireUnstableProviderOrThrow(
     57             ContentResolver resolver, String authority) throws RemoteException {
     58         final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
     59                 authority);
     60         if (client == null) {
     61             throw new RemoteException("Failed to acquire provider for " + authority);
     62         }
     63         client.setDetectNotResponding(PROVIDER_ANR_TIMEOUT);
     64         return client;
     65     }
     66 
     67     public static DocumentClipper getDocumentClipper(Context context) {
     68         return ((DocumentsApplication) context.getApplicationContext()).mClipper;
     69     }
     70 
     71     public static ClipStore getClipStore(Context context) {
     72         return ((DocumentsApplication) context.getApplicationContext()).mClipStore;
     73     }
     74 
     75     public static DragAndDropManager getDragAndDropManager(Context context) {
     76         return ((DocumentsApplication) context.getApplicationContext()).mDragAndDropManager;
     77     }
     78 
     79     public static Lookup<String, String> getFileTypeLookup(Context context) {
     80         return ((DocumentsApplication) context.getApplicationContext()).mFileTypeLookup;
     81     }
     82 
     83     @Override
     84     public void onCreate() {
     85         super.onCreate();
     86 
     87         final ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
     88         final int memoryClassBytes = am.getMemoryClass() * 1024 * 1024;
     89 
     90         mProviders = new ProvidersCache(this);
     91         mProviders.updateAsync(false);
     92 
     93         mThumbnailCache = new ThumbnailCache(memoryClassBytes / 4);
     94 
     95         mClipStore = new ClipStorage(
     96                 ClipStorage.prepareStorage(getCacheDir()),
     97                 getSharedPreferences(ClipStorage.PREF_NAME, 0));
     98         mClipper = DocumentClipper.create(this, mClipStore);
     99 
    100         mDragAndDropManager = DragAndDropManager.create(this, mClipper);
    101 
    102         mFileTypeLookup = new FileTypeMap(this);
    103 
    104         final IntentFilter packageFilter = new IntentFilter();
    105         packageFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
    106         packageFilter.addAction(Intent.ACTION_PACKAGE_CHANGED);
    107         packageFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);
    108         packageFilter.addAction(Intent.ACTION_PACKAGE_DATA_CLEARED);
    109         packageFilter.addDataScheme("package");
    110         registerReceiver(mCacheReceiver, packageFilter);
    111 
    112         final IntentFilter localeFilter = new IntentFilter();
    113         localeFilter.addAction(Intent.ACTION_LOCALE_CHANGED);
    114         registerReceiver(mCacheReceiver, localeFilter);
    115     }
    116 
    117     @Override
    118     public void onTrimMemory(int level) {
    119         super.onTrimMemory(level);
    120 
    121         mThumbnailCache.onTrimMemory(level);
    122     }
    123 
    124     private BroadcastReceiver mCacheReceiver = new BroadcastReceiver() {
    125         @Override
    126         public void onReceive(Context context, Intent intent) {
    127             final Uri data = intent.getData();
    128             if (data != null) {
    129                 final String packageName = data.getSchemeSpecificPart();
    130                 mProviders.updatePackageAsync(packageName);
    131             } else {
    132                 mProviders.updateAsync(true);
    133             }
    134         }
    135     };
    136 }
    137