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      1 /*
      2  * Copyright (C) 2008 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 android.content.res;
     18 
     19 import com.android.ide.common.rendering.api.AssetRepository;
     20 import com.android.layoutlib.bridge.Bridge;
     21 
     22 public class BridgeAssetManager extends AssetManager {
     23 
     24     private AssetRepository mAssetRepository;
     25 
     26     /**
     27      * This initializes the static field {@link AssetManager#sSystem} which is used
     28      * by methods who get a global asset manager using {@link AssetManager#getSystem()}.
     29      * <p/>
     30      * They will end up using our bridge asset manager.
     31      * <p/>
     32      * {@link Bridge} calls this method after setting up a new bridge.
     33      */
     34     public static AssetManager initSystem() {
     35         if (!(AssetManager.sSystem instanceof BridgeAssetManager)) {
     36             // Note that AssetManager() creates a system AssetManager and we override it
     37             // with our BridgeAssetManager.
     38             AssetManager.sSystem = new BridgeAssetManager();
     39             AssetManager.sSystem.makeStringBlocks(null);
     40         }
     41         return AssetManager.sSystem;
     42     }
     43 
     44     /**
     45      * Clears the static {@link AssetManager#sSystem} to make sure we don't leave objects
     46      * around that would prevent us from unloading the library.
     47      */
     48     public static void clearSystem() {
     49         AssetManager.sSystem = null;
     50     }
     51 
     52     public void setAssetRepository(AssetRepository assetRepository) {
     53         mAssetRepository = assetRepository;
     54     }
     55 
     56     public AssetRepository getAssetRepository() {
     57         return mAssetRepository;
     58     }
     59 
     60     public BridgeAssetManager() {
     61     }
     62 }
     63