Android热修复完整示例

package com.aitsuki.hotpatch; import android.content.Context; import android.util.Log; import java.io.File; import java.io.IOException; import dalvik.system.DexClassLoader; /** * Created by hp on 2016/4/11. */ public class HotPatch { // private HotPatch() {} private static Context mContext; public static void init(Context context) { mContext = context; File hackDir = context.getDir("hackDir", 0); File hackJar = new File(hackDir,"hack.jar"); try { AssetsUtil.copyAssets(context,"hack.jar", hackJar.getAbsolutePath()); inject(hackJar.getAbsolutePath()); } catch (IOException e) { e.printStackTrace(); } } public static void inject(String path) { File file = new File(path); if(file.exists()) { try { // 获取classes的dexElements Class<?> cl = Class.forName("dalvik.system.BaseDexClassLoader"); Object pathList = ReflectUtil.getField(cl, "pathList", mContext.getClassLoader()); Object baseElements = ReflectUtil.getField(pathList.getClass(), "dexElements", pathList); // 获取patch_dex的dexElements（需要先加载dex） String dexopt = mContext.getDir("dexopt", 0).getAbsolutePath(); DexClassLoader dexClassLoader = new DexClassLoader(path, dexopt, dexopt,mContext.getClassLoader()); Object obj = ReflectUtil.getField(cl, "pathList", dexClassLoader); Object dexElements = ReflectUtil.getField(obj.getClass(), "dexElements", obj); // 合并两个Elements Object combineElements = ReflectUtil.combineArray(dexElements, baseElements); // 将合并后的Element数组重新赋值给app的classLoader ReflectUtil.setField(pathList.getClass(), "dexElements", pathList, combineElements); } catch (Exception e) { e.printStackTrace(); } } else { Log.e("HotPatch", file.getAbsolutePath()+"does not exists"); } } }