1 /* 2 * Copyright (C) 2016 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * 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, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17 package com.googlecode.android_scripting.interpreter; 18 19 import dalvik.system.DexClassLoader; 20 21 import java.util.Collection; 22 import java.util.Iterator; 23 24 public class ExternalClassLoader { 25 26 public Object load(Collection<String> dexPaths, Collection<String> nativePaths, String className) 27 throws Exception { 28 String dexOutputDir = "/sdcard/dexoutput"; 29 String joinedDexPaths = join(dexPaths, ":"); 30 String joinedNativeLibPaths = nativePaths != null ? join(nativePaths, ":") : null; 31 DexClassLoader loader = 32 new DexClassLoader(joinedDexPaths, dexOutputDir, joinedNativeLibPaths, this.getClass() 33 .getClassLoader()); 34 Class<?> classToLoad = Class.forName(className, true, loader); 35 return classToLoad.newInstance(); 36 } 37 38 private static String join(Collection<String> collection, String delimiter) { 39 StringBuffer buffer = new StringBuffer(); 40 Iterator<String> iter = collection.iterator(); 41 while (iter.hasNext()) { 42 buffer.append(iter.next()); 43 if (iter.hasNext()) { 44 buffer.append(delimiter); 45 } 46 } 47 return buffer.toString(); 48 } 49 }
