子类化以标记另一个应用当前视图

Question

我的理解是不能返回另一个活动的视图。要标记com.android.settings＆gt;蓝牙是目前的观点，我是否正确使用下面的代码？

ActivityManager am = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);
List< ActivityManager.RunningTaskInfo > taskInfo = am.getRunningTasks(30); 
ComponentName componentInfo = null;
String componentInfo_getPackageName;

for(int i = 0;i<taskInfo.size();i++)
{
  componentInfo = taskInfo.get(i).topActivity;
  componentInfo_getPackageName = componentInfo.getPackageName();

  if (componentInfo_getPackageName.contains("settings")){
    Class<Object> clazz = null;
    componentInfo.getClass().asSubclass(clazz);
  }   
}