一、组件化和集成化的区别

二者区别

三、插件化常见手段

    占位式：需要借助临时对象去替换，是为了使用宿主的环境，开发困难

    Hook式：开发相比于占位式简单，且不需要this当前运行宿主环境，插件越多，内存中newElements也就越大

LoadedApk式 ：通过控制ClassLoader方式，来控制类的加载从而解决：插件越多，内存中newElements也就越大

四、插件化常见获得当前对象的方法

    方法一：

    Class<?> mPluginActivityClass = getClassLoader().loadClass(activityInfo);

    Constructor constructor = mPluginActivityClass.getConstructor(new Class[]{});

    Object mPluginActivity = constructor.newInstance(new Object[]{});

    //以下两种方式不一定可以拿到，需要去调试

    方法二：

    mPluginActivityClass.newInstance()

    方法三：

    activityThreadClass.getDeclaredConstructor().newInstance();

五、获取未安装app的类并且启动该类： 

通过PackageManager—>packageInfo-->activityInfo,可以拿到对应的类的名字

//1.获取想加载类的.class

File file =new File(Environment.getExternalStorageDirectory() + File.separator +"p.apk");

String path = file.getAbsolutePath(); //apk存储目录

PackageManager manager = getPackageManager();

PackageInfo packageInfo =

    manager.getPackageArchiveInfo(path, PackageManager.GET_ACTIVITIES);

ActivityInfo activityInfo = packageInfo.activities[0];

//2.下面是拿到当前Activity的实例对象

Class<?> mPluginActivityClass = getClassLoader().loadClass(activityInfo);

Constructor constructor = mPluginActivityClass.getConstructor(new Class[]{});

Object mPluginActivity = constructor.newInstance(new Object[]{});

ActivityInterface activityInterface = (ActivityInterface) mPluginActivity;

六、获取未安装app的类并且加载该类：

通过ClassLoader—>DexPathList——>Element数组，找到对象ClassLoader classLoader = context.getClassLoader();

//1.拿到DexPathList的对象

Class baseClassLoader = Class.forName("dalvik.system.BaseDexClassLoader");

Field pathListFidle = baseClassLoader.getDeclaredField("pathList");

pathListFidle.setAccessible(true);

Object dexPathList = pathListFidle.get(classLoader);

//2.拿到element的对象

Class clazz = Class.forName("dalvik.system.DexPathList");

Field dexElement = clazz.getDeclaredField("dexElements");

dexElement.setAccessible(true);

Object[] hostElements = (Object[]) dexElement.get(dexPathList);

//3.dexPath是apk的安装路径

ClassLoader pluginClassLoader =

    new DexClassLoader(dexPath, context.getCacheDir().getAbsolutePath(),

        null, classLoader);

Object pluginDexPathList = pathListFidle.get(pluginClassLoader);

Object[]pluginElements = (Object[]) dexElement.get(pluginDexPathList);

七、LoadedAPK去加载未安装APP的类