1 /* 2 * Copyright (C) 2019 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.io.File; 18 import java.lang.reflect.Field; 19 import java.lang.reflect.InvocationHandler; 20 import java.lang.reflect.Method; 21 import java.lang.reflect.Proxy; 22 23 public class Main { main(String[] args)24 public static void main(String[] args) throws Exception { 25 System.loadLibrary(args[0]); 26 init(); 27 appendToBootClassLoader(DEX_EXTRA, /* isCorePlatform */ false); 28 29 Class<?> klass = Object.class.getClassLoader().loadClass("MyInterface"); 30 Object obj = Proxy.newProxyInstance( 31 klass.getClassLoader(), 32 new Class[] { klass, Cloneable.class }, 33 new InvocationHandler() { 34 @Override 35 public Object invoke(Object proxy, Method method, Object[] args) { 36 return null; 37 } 38 }); 39 40 // Print names of declared methods - this should not include "hidden()". 41 for (Method m : obj.getClass().getDeclaredMethods()) { 42 System.out.println(m.getName()); 43 } 44 45 // Do not print names of fields. They do not have a set Java name. 46 if (obj.getClass().getDeclaredFields().length != 2) { 47 throw new Exception("Expected two fields in a proxy class: 'interfaces' and 'throws'"); 48 } 49 } 50 51 private static final String DEX_EXTRA = new File(System.getenv("DEX_LOCATION"), 52 "691-hiddenapi-proxy-ex.jar").getAbsolutePath(); 53 init()54 private static native void init(); appendToBootClassLoader(String dexPath, boolean isCorePlatform)55 private static native void appendToBootClassLoader(String dexPath, boolean isCorePlatform); 56 } 57