[问答] 关于RecyclerView点击删除后 页面就没响应的问题 自己通过用Android自带的ViewDragHelper这个类写了一个滑动删除，一开始在还没写删除逻辑的时候，都是正常运作,加了删除逻辑之后，数据是删除了，但是整个页面无法滑动也无法点击,但是Log没有报错误...这让我很郁闷,一开始以为是滑动冲突的问题,可是我把删除逻辑全注释了,就打印点击删除的Log，发现又能正常运用，这让我很无语....有没有大佬帮小弟解答...packagecom.example.bilibili_qq50;importandroid.content.Context;importandroid.util.AttributeSet;importandroid.util.Log;importandroid.view.MotionEvent;importandroid.view.View;importandroid.view.ViewGroup;importandroid.widget.Button;importandroid.widget.FrameLayout;importandroid.widget.TextView;importandroid.widget.Toast;importandroidx.annotation.NonNull;importandroidx.customview.widget.ViewDragHelper;//滑动删除publicclassSwipeLayoutextendsFrameLayoutimplementsView.OnClickListener{privatestaticfinalStringTAG="SwipeLayout";privateViewDragHelpermHelper;privateViewmDeleteView;privateViewmContentView;privateintmContentWidth;privateintmContentHeight;privateintmDeleteWidth;privateonSwipeClickListenermOnSwipeClickListener;privatefloatmDownX;privatefloatmDownY;privateSwipeManagermManager;privateenumSwipeState{OPEN,CLOSE;}privateSwipeStatecurrentStat=SwipeState.CLOSE;//默认关闭publicSwipeLayout(Contextcontext){this(context,null);}publicSwipeLayout(Contextcontext,AttributeSetattrs){this(context,attrs,0);}publicSwipeLayout(Contextcontext,AttributeSetattrs,intdefStyleAttr){super(context,attrs,defStyleAttr);initViewHelper(context);mManager=SwipeManager.getManager();}privatevoidinitViewHelper(Contextcontext){mHelper=ViewDragHelper.create(this,mCallback);}@OverrideprotectedvoidonFinishInflate(){super.onFinishInflate();mContentView=getChildAt(0);mDeleteView=getChildAt(1);TextViewbtnTop=mDeleteView.findViewById(R.id.swipe_top);TextViewbtnDelete=mDeleteView.findViewById(R.id.swipe_delete);btnTop.setOnClickListener(this);btnDelete.setOnClickListener(this);}@OverrideprotectedvoidonSizeChanged(intw,inth,intoldw,intoldh){super.onSizeChanged(w,h,oldw,oldh);mContentHeight=mContentView.getMeasuredHeight();mContentWidth=mContentView.getMeasuredWidth();mDeleteWidth=mDeleteView.getMeasuredWidth();Log.d(TAG,"mContentHeight-->"+mContentHeight);Log.d(TAG,"mContentWidth:"+mContentWidth);}@OverrideprotectedvoidonLayout(booleanchanged,intleft,inttop,intright,intbottom){//先摆放内容mContentView.layout(0,0,mContentWidth,mContentHeight);//摆放删除mDeleteView.layout(mContentView.getRight(),0,mContentView.getRight()+mDeleteWidth,mContentHeight);}privateViewDragHelper.CallbackmCallback=newViewDragHelper.Callback(){@OverridepublicbooleantryCaptureView(@NonNullViewchild,intpointerId){returnchild==mContentView||child==mDeleteView;}@OverridepublicvoidonViewPositionChanged(@NonNullViewchangedView,intleft,inttop,intdx,intdy){super.onViewPositionChanged(changedView,left,top,dx,dy);if(changedView==mContentView){mDeleteView.layout(mDeleteView.getLeft()+dx,mDeleteView.getTop()+dy,mDeleteView.getRight()+dx,mDeleteView.getBottom()+dy);}elseif(changedView==mDeleteView){mContentView.layout(mContentView.getLeft()+dx,mContentView.getTop()+dy,mContentView.getRight()+dx,mContentView.getBottom()+dy);}Log.d(TAG,"dx-->"+dx);//判断开关if(mContentView.getLeft()==0&¤tStat!=SwipeState.CLOSE){//应该是关闭currentStat=SwipeState.CLOSE;//这里则是关闭mManager.clearCurrentLayout();}elseif(mContentView.getLeft()==-mDeleteWidth&¤tStat!=SwipeState.OPEN){currentStat=SwipeState.OPEN;//走到这layout应该是打开的状态mManager.setCurrentLayout(SwipeLayout.this);}}@OverridepublicvoidonViewReleased(@NonNullViewreleasedChild,floatxvel,floatyvel){super.onViewReleased(releasedChild,xvel,yvel);if(mContentView.getLeft()<-mDeleteWidth/2){//打开//mHelper.smoothSlideViewTo(mContentView,-mDeleteWidth,0);open();}else{//关闭//mHelper.smoothSlideViewTo(mContentView,0,0);close();}}@OverridepublicintgetViewHorizontalDragRange(@NonNullViewchild){returnmDeleteWidth;}@OverridepublicintclampViewPositionHorizontal(@NonNullViewchild,intleft,intdx){if(child==mContentView){//右正左负if(left>0)left=0;if(left<-mDeleteWidth)left=-mDeleteWidth;}elseif(child==mDeleteView){if(left>mContentWidth)left=mContentWidth;if(left<(mContentWidth-mDeleteWidth))left=mContentWidth-mDeleteWidth;}Log.d(TAG,"left-->"+left);returnleft;}};@OverridepublicvoidcomputeScroll(){if(mHelper.continueSettling(true)){postInvalidateOnAnimation();}}//产生了滑动冲突根据滑动距离来判断是往哪里滑动@OverridepublicbooleanonTouchEvent(MotionEventevent){//如果当前有layout已经是打开就不允许点击其他View还可以滑动则下面的逻辑不能执行if(!mManager.isShouldSwipe(this)){//先关闭已经打开的layout//mManager.closeCurrentLayout();有卡顿移动到onInerequestDisallowInterceptTouchEvent(true);returntrue;}switch(event.getAction()){caseMotionEvent.ACTION_DOWN:mDownX=event.getX();mDownY=event.getY();break;caseMotionEvent.ACTION_MOVE:floatmoveX=event.getX();floatmoveY=event.getY();floatdelatX=moveX-mDownX;//X移动的距离floatdelatY=moveY-mDownY;//Y移动距离if(Math.abs(delatX)>Math.abs(delatY)){//那么移动应该是水平方向SwipeLayout处理recylist不拦截requestDisallowInterceptTouchEvent(true);//父view不拦截子view消费}//更新downXymDownX=moveX;mDownY=moveY;break;caseMotionEvent.ACTION_UP:break;}mHelper.processTouchEvent(event);returntrue;}@OverridepublicbooleanonInterceptTouchEvent(MotionEventev){booleanresult=mHelper.shouldInterceptTouchEvent(ev);//如果当前有打开的则需要拦截给子View处理if(!mManager.isShouldSwipe(this)){//先关闭已经打开的layoutmManager.closeCurrentLayout();result=true;}returnresult;}publicvoidopen(){mHelper.smoothSlideViewTo(mContentView,-mDeleteWidth,0);postInvalidateOnAnimation();}publicvoidclose(){mHelper.smoothSlideViewTo(mContentView,0,0);postInvalidateOnAnimation();}publicvoidsetOnSwipeClickListener(onSwipeClickListeneronSwipeClickListener){mOnSwipeClickListener=onSwipeClickListener;}@OverridepublicvoidonClick(Viewv){if(mOnSwipeClickListener!=null){switch(v.getId()){caseR.id.swipe_top://mOnSwipeClickListener.onTopClick();Toast.makeText(getContext(),"置顶",Toast.LENGTH_SHORT).show();Log.d(TAG,"top-->"+"置顶");break;caseR.id.swipe_delete://mOnSwipeClickListener.onDeleteClick();Toast.makeText(getContext(),"删除",Toast.LENGTH_SHORT).show();//Log.d(TAG,"DELETE-->"+"删除");break;}}}publicinterfaceonSwipeClickListener{voidonTopClick();voidonDeleteClick();voidonStatusChange();}}//滑动管理packagecom.example.bilibili_qq50;publicclassSwipeManager{privateSwipeManager(){}privatestaticSwipeManagersManager=null;publicstaticSwipeManagergetManager(){if(sManager==null){synchronized(SwipeManager.class){if(sManager==null){sManager=newSwipeManager();}}}returnsManager;}privateSwipeLayoutcurrentLayout;//用来记录当前打开的SwipeLayoutpublicvoidsetCurrentLayout(SwipeLayoutlayout){this.currentLayout=layout;}//判断是否能进行滑动如果没有打开的-->则可以滑动//如果有打开并且是本身-->判断打开的layout和当前按下的时候是同一个publicbooleanisShouldSwipe(SwipeLayoutswipeLayout){if(currentLayout==null){//当前没有打开的layoutreturntrue;}else{//说明有打开的returncurrentLayout==swipeLayout;}}//关闭已经打开的layoutpublicvoidcloseCurrentLayout(){if(currentLayout!=null){currentLayout.close();}}//清空当前所记录的已经打开的layoutpublicvoidclearCurrentLayout(){currentLayout=null;}}点击删除删除逻辑:运行
