private void init() {
    setWillNotDraw(false);
    startScrollerTask();
  //显示ScrollView下拉阴影
//      setOverScrollMode(View.OVER_SCROLL_NEVER);
    childHelper = new NestedScrollingChildHelper(this);
    childHelper.setNestedScrollingEnabled(true);
  }

   //修改注册Activity的category
   private final static String WEEX = "com.syq.android.intent.category.WEEX";