我们不的不了解ViewConfiguration这个类，官方是这么解释的Contains methods to standard constants used in the UI for timeouts, sizes, and distances
//包含方法用于超时，UI标准常数大小和距离
/**
* @return Distance in pixels a touch can wander before we think the user is scrolling 其实就是用户滚动的像素点的距离
*/
public int getScaledTouchSlop() {
return mTouchSlop;
}
有了这个方法是不是就有点头绪了呢
mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); //得到移动的距离
@Override
public boolean onInterceptTouchEvent(MotionEvent e) {
int action = e.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
downX = (int) e.getRawX();
downY = (int) e.getRawY();
break;
case MotionEvent.ACTION_MOVE:
int moveY = (int) e.getRawY();
if (Math.abs(moveY - downY) > mTouchSlop) { //我们只需要判断是不是在于要称移动的距离即可
return true;
}
}
Log.i(Tag,"onInterceptTouchEvent");
return super.onInterceptTouchEvent(e);
}