Android imitation Tik Tok sliding layout up and down

Vibrato slides up and down, monitors and plays, and automatically absorbs the top and bottom for your reference. The specific contents are as follows

Implementation using RecyclerView+PagerSnapHelper

public class DouYinLayoutManager extends LinearLayoutManager implements RecyclerView.OnChildAttachStateChangeListener{
  // Judge whether to slide up or down 
  private int mDrift;
  private OnViewPagerListener onViewPagerListener;
  // Ceiling and bottom suction 
  private PagerSnapHelper pagerSnapHelper;

  public OnViewPagerListener getOnViewPagerListener() {
    return onViewPagerListener;
  }

  public void setOnViewPagerListener(OnViewPagerListener onViewPagerListener) {
    this.onViewPagerListener = onViewPagerListener;
  }

  public DouYinLayoutManager(Context context) {
    super(context);
  }

  public DouYinLayoutManager(Context context, int orientation, boolean reverseLayout) {
    super(context, orientation, reverseLayout);
    pagerSnapHelper = new PagerSnapHelper();
  }

  /**
   *  When manager Completely add to recycleview Will be called in 
   * @param view
   */
  @Override
  public void onAttachedToWindow(RecyclerView view) {
    view.addOnChildAttachStateChangeListener(this);
    pagerSnapHelper.attachToRecyclerView(view);
    super.onAttachedToWindow(view);
  }

  @Override
  public boolean canScrollVertically() {
    return super.canScrollVertically();
  }

  @Override
  public int scrollVerticallyBy(int dy, RecyclerView.Recycler recycler, RecyclerView.State state) {
    mDrift = dy;
    return super.scrollVerticallyBy(dy, recycler, state);

  }

  @Override
  public void onChildViewAttachedToWindow(@NonNull View view) {
    if (mDrift > 0){
      // Slide upwards 
      if (onViewPagerListener != null && Math.abs(mDrift) == view.getHeight()){
        onViewPagerListener.onPageSelected(false,view);
      }
    }else {
      // Slide downwards 
      if (onViewPagerListener != null && Math.abs(mDrift) == view.getHeight()){
        onViewPagerListener.onPageSelected(true,view);
      }
    }
  }

  @Override
  public void onChildViewDetachedFromWindow(@NonNull View view) {
    if (mDrift >= 0){
      // Slide upwards 
      if (onViewPagerListener != null){
        onViewPagerListener.onPageRelease(true,view);
      }
    }else {
      // Slide downwards 
      if (onViewPagerListener != null){
        onViewPagerListener.onPageRelease(false,view);
      }
    }
  }

  @Override
  public void onScrollStateChanged(int state) {
    switch (state){
      case RecyclerView.SCROLL_STATE_IDLE:
        // Currently displayed item
        View snapView = pagerSnapHelper.findSnapView(this);
        if (onViewPagerListener != null){
          onViewPagerListener.onPageSelected(false,snapView);
        }
        break;
    }
    super.onScrollStateChanged(state);

  }
}

recyclerView. setLayoutManager () will do

recyclerView = findViewById(R.id.recyclerView_dy);
    douYinLayoutManager = new DouYinLayoutManager(this, OrientationHelper.VERTICAL,false);
    recyclerView.setLayoutManager(douYinLayoutManager);
    recyclerView.setAdapter(new MyAdapter());

    douYinLayoutManager.setOnViewPagerListener(new OnViewPagerListener() {
      @Override
      public void onPageRelease(boolean isNest, View position) {
        releaseVideo(position);
      }

      @Override
      public void onPageSelected(boolean isButten, View position) {
        playVideo(position);
      }
    });
  }

Code: MyUiDemo