自定义ScrollView实现ScrollView不惯性滑动

class NoFlyingScrollView(context:Context, attr: AttributeSet):ScrollView(context,attr){    override fun fling(velocityY: Int) {//        super.fling(0)    }}复制代码

Touch事件监听

scroll.setOnTouchListener({v,event->            when(event.action){                MotionEvent.ACTION_CANCEL,                MotionEvent.ACTION_UP -> {                    Log.d("--->","scroll.height="+scroll.height+"   event.rawY="+event.rawY+"  top.height="+top.height+"  scroll.scrollY"+scroll.scrollY+"  top.scrollY="+top.scrollY)                    if(showingTop){//正在展示顶部                        if(scroll.height+scroll.scrollY
    
     top.height&&scroll.height+scroll.scrollY
     
      top.height+spaceDistance){                            scroll.smoothScrollTo(0,top.height)                            showingTop = false                            return@setOnTouchListener true                        }                    }else{//正在展示下面的view                        //滚动高度小于topview-安全距离                        if (scroll.scrollY
      
       top.height-spaceDistance&&scroll.scrollY
       
        top.height){                            showingTop = false                            return@setOnTouchListener false                        }                    }                }                MotionEvent.ACTION_MOVE->{                }            }            false        })复制代码