传入偏移量下滑跟随

abstract：public boolean onTouchEvent(MotionEvent event) { //获取到手指处的横坐标和纵坐标    int x = (int) event.getX();    int y = (int) event.getY();    switch(event.getAction()){  

public boolean onTouchEvent(MotionEvent event) { 

//获取到手指处的横坐标和纵坐标    

int x = (int) event.getX();    

int y = (int) event.getY();    

switch(event.getAction()){      

case MotionEvent.ACTION_DOWN:       

 lastX = x;        

lastY = y;      

break;      

case MotionEvent.ACTION_MOVE:       

 //计算移动的距离        

int offX = x - lastX;       

 int offY = y - lastY;        

offsetLeftAndRight(offX);        

offsetTopAndBottom(offY);     

 break;    

}   

 return true;  

}

Correcting teacher：查无此人Correction time：2019-06-10 09:39:19
Teacher's summary：完成的不错。js功能非常强大，要好好练习。继续加油。