ItemTouchHelper回调

ItemTouchHelper.Callback callback = new ItemTouchHelper.Callback() {
    @Override
    public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
        int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN; // 允许上下拖拽
        int swipeFlags = ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT; // 允许左右滑动
        return makeMovementFlags(dragFlags, swipeFlags);
    }

    @Override
    public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
        // 处理拖拽操作
        // 实现列表数据的重新排序
        return true;
    }

    @Override
    public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
        // 处理滑动操作
        // 实现列表数据的删除等操作
    }

    @Override
    public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {
        if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
            // 当Item被选中时，改变其背景色等UI变化
        }
        super.onSelectedChanged(viewHolder, actionState);
    }

    @Override
    public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
        // 当Item拖拽或滑动结束时，还原其背景色等UI变化
        super.clearView(recyclerView, viewHolder);
    }
};

ItemTouchHelper itemTouchHelper = new ItemTouchHelper(callback);
itemTouchHelper.attachToRecyclerView(recyclerView);