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.graphics.Point; 28 import android.net.Uri; 29 import android.os.RemoteException; 30 import android.text.format.DateUtils; 31 32 public class DocumentsApplication extends Application { 33 private static final long PROVIDER_ANR_TIMEOUT = 20 * DateUtils.SECOND_IN_MILLIS; 34 35 private RootsCache mRoots; 36 private Point mThumbnailsSize; 37 private ThumbnailCache mThumbnails; 38 getRootsCache(Context context)39 public static RootsCache getRootsCache(Context context) { 40 return ((DocumentsApplication) context.getApplicationContext()).mRoots; 41 } 42 getThumbnailsCache(Context context, Point size)43 public static ThumbnailCache getThumbnailsCache(Context context, Point size) { 44 final DocumentsApplication app = (DocumentsApplication) context.getApplicationContext(); 45 final ThumbnailCache thumbnails = app.mThumbnails; 46 if (!size.equals(app.mThumbnailsSize)) { 47 thumbnails.evictAll(); 48 app.mThumbnailsSize = size; 49 } 50 return thumbnails; 51 } 52 acquireUnstableProviderOrThrow( ContentResolver resolver, String authority)53 public static ContentProviderClient acquireUnstableProviderOrThrow( 54 ContentResolver resolver, String authority) throws RemoteException { 55 final ContentProviderClient client = resolver.acquireUnstableContentProviderClient( 56 authority); 57 if (client == null) { 58 throw new RemoteException("Failed to acquire provider for " + authority); 59 } 60 client.setDetectNotResponding(PROVIDER_ANR_TIMEOUT); 61 return client; 62 } 63 64 @Override onCreate()65 public void onCreate() { 66 super.onCreate(); 67 68 final ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); 69 final int memoryClassBytes = am.getMemoryClass() * 1024 * 1024; 70 71 mRoots = new RootsCache(this); 72 mRoots.updateAsync(false); 73 74 mThumbnails = new ThumbnailCache(memoryClassBytes / 4); 75 76 final IntentFilter packageFilter = new IntentFilter(); 77 packageFilter.addAction(Intent.ACTION_PACKAGE_ADDED); 78 packageFilter.addAction(Intent.ACTION_PACKAGE_CHANGED); 79 packageFilter.addAction(Intent.ACTION_PACKAGE_REMOVED); 80 packageFilter.addAction(Intent.ACTION_PACKAGE_DATA_CLEARED); 81 packageFilter.addDataScheme("package"); 82 registerReceiver(mCacheReceiver, packageFilter); 83 84 final IntentFilter localeFilter = new IntentFilter(); 85 localeFilter.addAction(Intent.ACTION_LOCALE_CHANGED); 86 registerReceiver(mCacheReceiver, localeFilter); 87 } 88 89 @Override onTrimMemory(int level)90 public void onTrimMemory(int level) { 91 super.onTrimMemory(level); 92 93 if (level >= TRIM_MEMORY_MODERATE) { 94 mThumbnails.evictAll(); 95 } else if (level >= TRIM_MEMORY_BACKGROUND) { 96 mThumbnails.trimToSize(mThumbnails.size() / 2); 97 } 98 } 99 100 private BroadcastReceiver mCacheReceiver = new BroadcastReceiver() { 101 @Override 102 public void onReceive(Context context, Intent intent) { 103 final Uri data = intent.getData(); 104 if (data != null) { 105 final String packageName = data.getSchemeSpecificPart(); 106 mRoots.updatePackageAsync(packageName); 107 } else { 108 mRoots.updateAsync(true); 109 } 110 } 111 }; 112 } 113