case MotionEvent.ACTION_MOVE:
       float y = motionEvent.getY();
       if(y>=mTouchMoveStartY){
           float moveSize = y-mTouchMoveStartY;
           float progress = moveSize>=TOUCH_MOVE_MAX_Y?1:moveSize/TOUCH_MOVE_MAX_Y;
           mTouchPullView.setProgress(progress);
       }
  mTouchPullView.release();
   return true;