RecyclerView实现Item条目随意拖拽排序

本文主要介绍一个RecyclerView的拖动排序的功能、实现了类似ListView的拖动和GridView的拖动排序、如果你还在使用ListView的话、可以放弃掉ListView了

因为RecyclerView自动帮我们缓存Item视图（ViewHolder）、允许我们自定义各种动作的动画和分割线、允许我们对Item进行一些手势操作、另外因为Design库的推出大大方便我们编写带有Material风格的App、而ListView是不兼容这个库的、比如滑动的相互协调、只有RecyclerView能做到、话不多说、先来看看Demo的效果图

onCreate初始化代码

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ////////////////////////////////////////////////////////
    /////////初始化数据，如果缓存中有就使用缓存中的
    ArrayList<Item> items = (ArrayList<Item>) ACache.get(getActivity()).getAsObject("items");
    if (items!=null)
        results.addAll(items);
    else {
        for (int i = 0; i < 3; i  ) {
            results.add(new Item(i*8 0,"美食", R.drawable.ic_category_0));
            results.add(new Item(i*8 1,"电影", R.drawable.ic_category_1));
            results.add(new Item(i*8 2,"酒店", R.drawable.ic_category_2));
            results.add(new Item(i*8 3,"KTV", R.drawable.ic_category_3));
            results.add(new Item(i*8 4,"外卖", R.drawable.ic_category_4));
            results.add(new Item(i*8 5,"彩票", R.drawable.ic_category_5));
            results.add(new Item(i*8 6,"电影", R.drawable.ic_category_6));
            results.add(new Item(i*8 7,"游戏", R.drawable.ic_category_7));
        }
    }
    results.remove(results.size()-1);
    results.add(new Item(results.size(), "更多", R.drawable.takeout_ic_more));
}

onViewCreated处理recyclerView

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    RecyclerAdapter adapter = new RecyclerAdapter(R.layout.item_grid,results);
    recyclerView = (RecyclerView)view;
    recyclerView.setHasFixedSize(true);
    recyclerView.setAdapter(adapter);
    recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 4));
    recyclerView.addItemDecoration(new DividerGridItemDecoration(getActivity()));

    itemTouchHelper = new ItemTouchHelper(new MyItemTouchCallback(adapter).setOnDragListener(this));
    itemTouchHelper.attachToRecyclerView(recyclerView);

    recyclerView.addOnItemTouchListener(new OnRecyclerItemClickListener(recyclerView) {
        @Override
        public void onLongClick(RecyclerView.ViewHolder vh) {
            if (vh.getLayoutPosition()!=results.size()-1) {
                itemTouchHelper.startDrag(vh);
                VibratorUtil.Vibrate(getActivity(), 70);   //震动70ms
            }
        }
        @Override
        public void onItemClick(RecyclerView.ViewHolder vh) {
            Item item = results.get(vh.getLayoutPosition());
            Toast.makeText(getActivity(),item.getId() " " item.getName(),Toast.LENGTH_SHORT).show();
        }
    });
}

recyclerview实现ListView和GridView拖拽源代码下载链接: recyclerview拖拽排序 密码: 3kxx