Android實現拖拉移動Item

效果圖：

DragAdapter.java：

package cc.turbosnail.itemdemo.demodrag;

import android.content.Context;
import android.graphics.Color;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

import cc.turbosnail.itemdemo.R;
import cc.turbosnail.itemdemo.helper.OnDragVHListener;
import cc.turbosnail.itemdemo.helper.OnItemMoveListener;

/**
 * 僅拖拽排序
 * Created by YoKeyword on 16/1/4.
 */
public class DragAdapter extends RecyclerView.Adapter<DragAdapter.DragViewHolder> implements OnItemMoveListener {
    private List<String> mItems;
    private LayoutInflater mInflater;

    public DragAdapter(Context context, List<String> items) {
        mInflater = LayoutInflater.from(context);
        this.mItems = items;
    }

    @Override
    public DragViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new DragViewHolder(mInflater.inflate(R.layout.item_drag, parent, false));
    }

    @Override
    public void onBindViewHolder(DragViewHolder holder, int position) {
        holder.tv.setText(mItems.get(position));
    }

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

    @Override
    public void onItemMove(int fromPosition, int toPosition) {
        String item = mItems.get(fromPosition);
        mItems.remove(fromPosition);
        mItems.add(toPosition, item);
        notifyItemMoved(fromPosition, toPosition);
    }

    class DragViewHolder extends RecyclerView.ViewHolder implements OnDragVHListener {
        TextView tv;

        public DragViewHolder(View itemView) {
            super(itemView);
            tv = (TextView) itemView.findViewById(R.id.tv);
        }

        @Override
        public void onItemSelected() {
            itemView.setBackgroundColor(Color.LTGRAY);
        }

        @Override
        public void onItemFinish() {
            itemView.setBackgroundColor(0);
        }
    }
}

項目代碼：https://download.csdn.net/download/baidu_38262490/10474923
GitHub：https://github.com/YoKeyword/ItemTouchHelperDemo