RecyclerView垂直跑马灯

public class MarqueeRecyclerView extends RecyclerView {
    Thread thread = null;
    AtomicBoolean shouldContinue = new AtomicBoolean(false);
    Handler mHandler;

    public MarqueeRecyclerView(@NonNull Context context) {
        super(context);
    }

    public MarqueeRecyclerView(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public MarqueeRecyclerView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    private void init() {
        //主线程的handler，用于执行Marquee的滚动消息
        mHandler=new Handler(){
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                switch (msg.what){
                    case 1://不论是竖直滚动还是水平滚动，都是偏移5个像素
                        MarqueeRecyclerView.this.scrollBy(5, 5);
                        break;
                }
            }
        };
        if (thread == null) {
            thread = new Thread() {
                @Override
                public void run() {
                    while (shouldContinue.get()) {
                        try {
                            Thread.sleep(200);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        Message msg=mHandler.obtainMessage();
                        msg.what=1;
                        msg.sendToTarget();
                    }
                    //退出循环时清理handler
                    mHandler=null;
                }
            };
        }
    }

    @Override
    /**
     * 在附到窗口的时候开始滚动
     */
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
        shouldContinue.set(true);
        init();
        thread.start();
    }

    @Override
    /**
     * 在脱离窗口时处理相关内容
     */
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        stopMarquee();
    }

    /**
     * 停止滚动
     */
    public void stopMarquee() {
        shouldContinue.set(false);
        thread = null;
    }
}

public class MarqueeRecyclerAdapter extends RecyclerView.Adapter {
    private List mData;
    private int size;
    private LayoutInflater mLayoutInflater;

    public  MarqueeRecyclerAdapter(List data, Context context) {
        mData = data;
        size=mData.size();
        mLayoutInflater= LayoutInflater.from(context);
    }


    @NonNull
    @Override
    public MarqueHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view=mLayoutInflater.inflate(R.layout.marque_item,null,false);
        return new MarqueHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull MarqueHolder marqueHolder, int position) {
        marqueHolder.tv.setText(mData.get(position%size));
    }


    @Override
    public int getItemCount() {
        return Integer.MAX_VALUE;
    }

    class MarqueHolder extends RecyclerView.ViewHolder {
        TextView tv;

        public MarqueHolder(View view) {
            super(view);
            tv = view.findViewById(R.id.tv);
        }


    }
}

public class MainActivity extends AppCompatActivity {

    private List data;
    private MarqueeRecyclerAdapter adapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        MarqueeRecyclerView marqueeView =findViewById(R.id.marqueView);
        LinearLayoutManager lm=new LinearLayoutManager(this);
        lm.setOrientation(LinearLayoutManager.VERTICAL);//设置是横还是竖
        marqueeView.setLayoutManager(lm);
        adapter = new MarqueeRecyclerAdapter(getData(),this);
        marqueeView.setAdapter(adapter);
    }


    private List getData(){
        data = new ArrayList<>();
        for(int i = 0;i<10;i++){
            data.add("第"+i+"条");
        }
        return data;
    }
}