android 水平 垂直滑动

 在自定义View中  水平 垂直滑动处理方法

@Override
  public boolean dispatchTouchEvent(MotionEvent ev) {
    switch (ev.getAction()) {
      case MotionEvent.ACTION_DOWN:
        mDownX = ev.getX();
        mDownY = ev.getRawY();
        break;
      case MotionEvent.ACTION_MOVE:
        float moveX = ev.getX();
        float moveY = ev.getRawY();
        float diffX = Math.abs(moveX - mDownX);
        float diffY = Math.abs(moveY - mDownY);
        boolean isHorizon = Math.tan(diffY / diffX) < Math.tan(45.0);
        if (isHorizon) {
          return dispatchTouchEventSupper(ev);
        }
        break;
    }
    return super.dispatchTouchEvent(ev);
  }

@Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                mDownX = ev.getX();
                mDownY = ev.getY();
                getParent().requestDisallowInterceptTouchEvent(true);
                break;
            case MotionEvent.ACTION_MOVE:
                if (Math.abs(ev.getX() - mDownX) > 5) {
                    getParent().requestDisallowInterceptTouchEvent(true);
                }else if(Math.abs(ev.getY() - mDownY) > 5){
                    getParent().requestDisallowInterceptTouchEvent(false);
                }else {
                    getParent().requestDisallowInterceptTouchEvent(false);
                }
                break;
        }
        return super.dispatchTouchEvent(ev);
    }