| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.example.loaders; |
| |
| import android.app.Application; |
| import android.content.res.Resources; |
| import android.content.res.loader.ResourcesLoader; |
| import android.content.res.loader.ResourcesProvider; |
| import android.os.ParcelFileDescriptor; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| public class LoadersApplication extends Application { |
| private static final String TAG = "LoadersApplication"; |
| private static final String LOADER_RESOURCES_APK = "AppResourcesLoaders_Overlay.apk"; |
| |
| @Override |
| public void onCreate() { |
| try { |
| final Resources resources = getResources(); |
| final ResourcesLoader loader = new ResourcesLoader(); |
| loader.addProvider(ResourcesProvider.loadFromApk(copyResource(LOADER_RESOURCES_APK))); |
| resources.addLoaders(loader); |
| } catch (IOException e) { |
| throw new IllegalStateException("Failed to load loader resources ", e); |
| } |
| } |
| |
| private ParcelFileDescriptor copyResource(String fileName) throws IOException { |
| final File apkFile = new File(getFilesDir(), fileName); |
| final InputStream is = getClassLoader().getResourceAsStream(LOADER_RESOURCES_APK); |
| final FileOutputStream os = new FileOutputStream(apkFile); |
| byte[] buffer = new byte[8192]; |
| int count; |
| while ((count = is.read(buffer)) != -1) { |
| os.write(buffer, 0, count); |
| } |
| return ParcelFileDescriptor.open(apkFile, ParcelFileDescriptor.MODE_READ_ONLY); |
| } |
| } |