1 /* 2 * Copyright (C) 2017 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 import java.lang.reflect.Method; 18 19 public class Main { 20 private static long getDexFileSize(String filename) throws Exception { 21 ClassLoader loader = Main.class.getClassLoader(); 22 Class<?> DexFile = loader.loadClass("dalvik.system.DexFile"); 23 Method DexFile_loadDex = DexFile.getMethod("loadDex", 24 String.class, 25 String.class, 26 Integer.TYPE); 27 Method DexFile_getStaticSizeOfDexFile = DexFile.getMethod("getStaticSizeOfDexFile"); 28 Object dexFile = DexFile_loadDex.invoke(null, filename, null, 0); 29 return (Long) DexFile_getStaticSizeOfDexFile.invoke(dexFile); 30 } 31 32 private static void test(String resource) throws Exception { 33 String filename = System.getenv("DEX_LOCATION") + "/res/" + resource; 34 long size = getDexFileSize(filename); 35 System.out.println("Size for " + resource + ": " + size); 36 } 37 38 public static void main(String[] args) throws Exception { 39 test("test1.dex"); 40 test("test2.dex"); 41 test("test-jar.jar"); 42 test("multi-jar.jar"); 43 } 44 } 45
