仿QQ拖拽滑動刪除列表條目

拖拽item，item切換，滑動時刪除item，先上效果：

1.依賴庫：

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:24.1.1'
    compile 'com.android.support:recyclerview-v7:24.1.1'
}

2.RecyclerView實現：

public class MainActivity extends AppCompatActivity implements StartListener {
    private RecyclerView recyclerView;
    private ItemTouchHelper itemTouchHelper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerView = (RecyclerView) findViewById(R.id.recylerview);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        List<Data> list = getData();
        MyAdapter adapter = new MyAdapter(list, this);
        recyclerView.setAdapter(adapter);
        /**
         * ItemTouchHelper 關鍵就是這個東西，處理關於在RecyclerView上添加拖動排序與滑動刪除的所有事情
         */
        ItemTouchHelper.Callback callback = new MyItemTouchHelper(adapter);
        itemTouchHelper = new ItemTouchHelper(callback);
        itemTouchHelper.attachToRecyclerView(recyclerView);
    }

    /*
    初始化數據
     */
    public List<Data> getData() {
        List<Data> data = new ArrayList<Data>();
        data.add(new Data(R.drawable.b, "11111", "aaaa"));
        data.add(new Data(R.drawable.b, "22", "bbb"));
        data.add(new Data(R.drawable.b, "33", "ccc"));
        data.add(new Data(R.drawable.b, "44", "ddd"));
        data.add(new Data(R.drawable.b, "55", "eee"));
        data.add(new Data(R.drawable.b, "66", "fff"));
        data.add(new Data(R.drawable.b, "77", "ggg"));

        return data;
    }

    @Override
    public void onStartDrag(RecyclerView.ViewHolder holder) {
        itemTouchHelper.startDrag(holder);
    }
}

3.定義適配器：

<span style="font-size:10px;">public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> implements DragListener {
    List<Data> datas;
    StartListener startListener;

    public MyAdapter(List<Data> data, StartListener listener) {
        this.startListener = listener;
        this.datas = data;
    }


    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int i) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
        return new MyViewHolder(view);
    }

    @Override
    public void onBindViewHolder(final MyViewHolder myViewHolder, int i) {
        Data data1 = datas.get(i);
        myViewHolder.imageView.setImageResource(data1.getImageView());
        myViewHolder.textView1.setText(data1.getTextView1());
        myViewHolder.textView2.setText(data1.getTextView2());
        myViewHolder.imageView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                if (motionEvent.getAction() == MotionEvent.ACTION_DOWN)
                    startListener.onStartDrag(myViewHolder);
                return false;
            }
        });
    }

    @Override
    public int getItemCount() {
        return datas.size();
    }

    @Override
    public void dragItem(int oldposition, int newposition) {
        Collections.swap(datas, oldposition, newposition);
        notifyItemMoved(oldposition, newposition);
    }

    @Override
    public void deleteItem(int position) {
        datas.remove(position);
        notifyItemRemoved(position);
    }

    class MyViewHolder extends RecyclerView.ViewHolder {
        private ImageView imageView;
        private TextView textView1, textView2;
        private LinearLayout linearLayout;

        public MyViewHolder(View itemView) {
            super(itemView);
            imageView = (ImageView) itemView.findViewById(R.id.image);
            textView1 = (TextView) itemView.findViewById(R.id.text);
            textView2 = (TextView) itemView.findViewById(R.id.text2);
            linearLayout = (LinearLayout) itemView.findViewById(R.id.linearlayout);
        }
    }
}</span>

4.接口聲明：

public interface DragListener {
    public void dragItem(int oldposition,int newposition);//item拖動時回調
    public void deleteItem(int position);//item移除時回調
}

public interface StartListener {
    public void onStartDrag(RecyclerView.ViewHolder holder);
}

5.ItemTouchHelper實現

public class MyItemTouchHelper extends ItemTouchHelper.Callback {
    DragListener dragListener;

    public MyItemTouchHelper(DragListener dragListener) {
        this.dragListener = dragListener;
    }

    /**
     * 監聽拖拽側滑效果
     * @param recyclerView
     * @param viewHolder
     * @return
     */
    @Override
    public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
        int up = ItemTouchHelper.UP;
        int down = ItemTouchHelper.DOWN;
        int left = ItemTouchHelper.LEFT;
        int right = ItemTouchHelper.RIGHT;
        int tflags = up | down;
        int dflags = left | right;
        return makeMovementFlags(tflags, dflags);
    }

    /**
     * 移動時回調
     * @param recyclerView
     * @param viewHolder
     * @param viewHolder2
     * @return
     */
    @Override
    public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder viewHolder2) {
        dragListener.dragItem(viewHolder.getAdapterPosition(), viewHolder2.getAdapterPosition());
        return true;
    }

    /**
     * 側滑時回調
     * @param viewHolder
     * @param i
     */
    @Override
    public void onSwiped(RecyclerView.ViewHolder viewHolder, int i) {
        dragListener.deleteItem(viewHolder.getAdapterPosition());
    }

    @Override
    public boolean isLongPressDragEnabled() {//長按拖拽效果
        return true;
    }

demo地址：點擊打開鏈接