MainFragment.java

package com.bigfat.itemtouchhelperdemo;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.List;

/**
 * A simple {@link Fragment} subclass.
 */
public class MainFragment extends Fragment {
    //控件
    private RecyclerView mRecyclerView;
    private RecyclerListAdapter mAdapter;

    public MainFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_main, container, false);
    }

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

        mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        mAdapter = new RecyclerListAdapter(generateList(30));
        mRecyclerView.setAdapter(mAdapter);
        ItemTouchHelper.Callback callback = new ItemTouchHelperCallback(mAdapter);
        ItemTouchHelper itemTouchHelper = new ItemTouchHelper(callback);
        itemTouchHelper.attachToRecyclerView(mRecyclerView);
    }

    private List<String> generateList(int capacity) {
        List<String> list = new ArrayList<>();
        for (int i = 0; i < capacity; i++) {
            list.add(String.valueOf(i));
        }
        return list;
    }
}