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 package android.content.res; 17 18 import android.annotation.NonNull; 19 import android.annotation.Nullable; 20 import com.android.ide.common.rendering.api.AssetRepository; 21 import com.android.layoutlib.bridge.Bridge; 22 23 public class BridgeAssetManager extends AssetManager { 24 @Nullable 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 } 40 return AssetManager.sSystem; 41 } 42 43 /** 44 * Clears the static {@link AssetManager#sSystem} to make sure we don't leave objects 45 * around that would prevent us from unloading the library. 46 */ 47 public static void clearSystem() { 48 AssetManager.sSystem = null; 49 } 50 51 public void setAssetRepository(@NonNull AssetRepository assetRepository) { 52 mAssetRepository = assetRepository; 53 } 54 55 /** 56 * Clears the AssetRepository reference. 57 */ 58 public void releaseAssetRepository() { 59 mAssetRepository = null; 60 } 61 62 @NonNull 63 public AssetRepository getAssetRepository() { 64 if (mAssetRepository == null) { 65 throw new IllegalStateException("Asset repository is not set"); 66 } 67 return mAssetRepository; 68 } 69 70 public BridgeAssetManager() { 71 } 72 } 73
