RecyClerView实现拖拽与侧滑删除

TouchCallBack

public interface TouchCallBack {
    //数据交换
    void onItemMove(int fromPosition, int toPosition);

    //数据删除
    void onItemDelete(int position);
}

SimpleItemTouchHelperCallBack

public class SimpleItemTouchHelperCallBack extends ItemTouchHelper.Callback {

    private TouchCallBack touchCallBack;

    public SimpleItemTouchHelperCallBack(TouchCallBack touchCallBack) {
        this.touchCallBack = touchCallBack;
    }

    @Override
    public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
        //允许上下移动
        int drag = ItemTouchHelper.UP | ItemTouchHelper.DOWN;

        //允许左右滑动
        int swip = ItemTouchHelper.LEFT|ItemTouchHelper.RIGHT;
        return makeMovementFlags(drag, right);
    }

    @Override
    public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
        touchCallBack.onItemMove(viewHolder.getAdapterPosition(), target.getAdapterPosition());
        return true;
    }

    @Override
    public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
        touchCallBack.onItemDelete(viewHolder.getAdapterPosition());
    }
}

GoldChooseTabAdapter（适配器里面添加）

    @Override
    public void onItemMove(int fromPosition, int toPosition) {
        //通过集合工具类交换位置
        Collections.swap(list,fromPosition,toPosition);
        //局部刷新
        notifyItemMoved(fromPosition, toPosition);
    }

    @Override
    public void onItemDelete(int position) {
        list.remove(position);
        notifyItemRangeChanged(position, list.size() - position);
        notifyItemRemoved(position);
    }

Activity里写

   //自定义处理类
   //callback回调，上下拖动和左右移动的时间触发
        SimpleItemTouchHelperCallBack helper = new SimpleItemTouchHelperCallBack(adapter);
   //itemTouchHelper系统辅助类，赋值需要一个ItemTouchHelper.callback对象，自定义处理类
        ItemTouchHelper touchHelper = new ItemTouchHelper(helper);
        //关联一个Recyclerview
        touchHelper.attachToRecyclerView(recy);

更炫酷的侧滑以及刷新效果:https://qibilly.com/SmartSwipe-tutorial/