Android 反射机制备份

 try {            Class<?> cls= Class.forName("android.app.ActivityManager");//            Object object = cls.newInstance();            Method method = cls.getDeclaredMethod("getMaxRecentTasksStatic");//该方法是无参的参数            Log.i(TAG,"method = "+method.invoke(null));        }catch (Exception e){            Log.i(TAG,"lsn e = "+e.getMessage());        }

常用方法：