Android 自动滚动的RecyclerView，手动滑动和自动滑动无缝衔接，手动滑动时数据不重复

概要

做一个自动滑动的列表，用于展示聊天记录或者通知栏信息等，还是index.php/tags-602.html" >使用主流的RecyclerView来做。网上有很多案例，但当手动滑动时会一直无限循环，数据重复的出现，如果想要自动滑动时能无限循环，手动滑动时又能滑到底呢？本案例就解决这种手动滑动和自动滑动无缝衔接的问题。

思路

1、重写RecyclerView，通过scrollBy和postDelayed进行定时移动到达自动滑动目的

2、RecyclerView添加addOnScrollListener，进行手指按下滑动和抬起监听，用于判断是手动滑动还是自动滑动。

3、修改adapter的itemCount

4、接下来上代码

实现方案

1、重写 RecyclerView：

public class SocllRecyclerView extends RecyclerView {    private Autoaaview autoview;    private boolean running;    private boolean canrun;    private static final int Timea = 40;//控制滚动的速度，值越大速度越慢    public SocllRecyclerView(@NonNull Context context, @Nullable AttributeSet attrs) {        super(context, attrs);        autoview = new Autoaaview(this);    }    public SocllRecyclerView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }    private class Autoaaview implements Runnable{        WeakReference myScrViewWeakReference;        public Autoaaview(SocllRecyclerView myScrView) {            myScrViewWeakReference = new WeakReference(myScrView);        }        @Override        public void run() {            SocllRecyclerView myScrView = myScrViewWeakReference.get();            if (myScrView.canrun&&myScrView.running){                myScrView.scrollBy(2,2);                myScrView.postDelayed(myScrView.autoview,Timea);            }        }    }    //开始滚动    public void start(){        if (running)            stop();        running = true;        canrun = true;        postDelayed(autoview,Timea);    }    //停止滚动    public void stop() {        running = false;        removeCallbacks(autoview);    }    @Override    public boolean onTouchEvent(MotionEvent e) {        return super.onTouchEvent(e);    }}

2、适配器 MyscrviewAdapter

public class MyscrviewAdapter ext