private void useDexClassLoader(){
//获得想要的app
Intent intent = new Intent("com.wanted.app", null);
PackageManager pm = getPackageManager();
List<ResolveInfo> resolveinfoes =pm.queryIntentActivities(intent, 0);
ActivityInfo actInfo = resolveinfoes.get(0).activityInfo;
//获得包名
String pacageName = actInfo.packageName;
//获得apk的目录或者jar的目录
String apkPath = actInfo.applicationInfo.sourceDir;
String dexOutputDir = getApplicationInfo().dataDir;
//native代码的目录
String libPath = actInfo.applicationInfo.nativeLibraryDir;
//创建类加载器，把dex加载到虚拟机中
DexClassLoader calssLoader = new DexClassLoader(apkPath, dexOutputDir, libPath,
this.getClass().getClassLoader());
//利用反射调用插件包内的类的方法
try {
Class<?> clazz = calssLoader.loadClass(pacageName+".Plugin1");
Object obj = clazz.newInstance();
Class[] param = new Class[2];
param[0] = Integer.TYPE;
param[1] = Integer.TYPE;
Method method = clazz.getMethod("function1", param);
Integer ret = (Integer)method.invoke(obj, 1,12);
Log.i("Host", "return result is " + ret);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
