RecyclerView的列表項(xiàng)滑動排序

要實(shí)現(xiàn)RecyclerView的列表項(xiàng)滑動排序，可以按照以下步驟進(jìn)行操作：

1. 在RecyclerView的Adapter中添加一個方法，用于交換列表項(xiàng)的位置。例如：

public void swapItems(int fromPosition, int toPosition) {
    Collections.swap(dataList, fromPosition, toPosition);
    notifyItemMoved(fromPosition, toPosition);
}

2. 在RecyclerView的ItemTouchHelper.Callback中實(shí)現(xiàn)拖動和滑動的功能。例如：

ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new ItemTouchHelper.Callback() {
    @Override
    public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
        int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
        int swipeFlags = 0;
        return makeMovementFlags(dragFlags, swipeFlags);
    }

    @Override
    public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
        int fromPosition = viewHolder.getAdapterPosition();
        int toPosition = target.getAdapterPosition();
        adapter.swapItems(fromPosition, toPosition);
        return true;
    }

    @Override
    public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
        // do nothing
    }
});
itemTouchHelper.attachToRecyclerView(recyclerView);

3. 在RecyclerView的LayoutManager中設(shè)置支持拖動排序的功能。例如：

recyclerView.setLayoutManager(new LinearLayoutManager(this));
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new ItemTouchHelper.Callback() {
    // implementation
});
itemTouchHelper.attachToRecyclerView(recyclerView);

通過以上步驟實(shí)現(xiàn)了RecyclerView的列表項(xiàng)滑動排序功能，用戶可以通過長按并拖動列表項(xiàng)來改變列表項(xiàng)的位置。