分页加载的Fragment

 package com.z.fragment;

 import android.os.Bundle;
 import android.os.Environment;
 import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
 import android.support.v4.widget.SwipeRefreshLayout;
 import android.support.v7.widget.LinearLayoutManager;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Toast;

 import com.google.gson.Gson;
 import com.    .MyApp;
 import com.z.  .R;
 import com.z..adapter.AppNewAdapter;
 import com.z..bean.HomeNewData;
 import com.z..utils.ApiUrls;
 import com.z..utils.DefaultCallBack;
 import com.z..utils.HttpUtils;
 import com.z..view.AutoLoadRecylerView;

 import butterknife.BindView;
 import butterknife.ButterKnife;

 public class HomeFragment extends Fragment {
     @BindView(R.id.rv)
     AutoLoadRecylerView rv;
     @BindView(R.id.refresh_layout)
     SwipeRefreshLayout refreshLayout;
     private AppNewAdapter newAdapter;
     private int currPageIndex = 0;
     @Nullable
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable final ViewGroup container, @Nullable Bundle savedInstanceState) {
         //1.布局xml|使用Code
         int layoutId = R.layout.fragment_home_new;
         //2.阅读接口文档
         //3.可在调试模式获取json
         currPageIndex = 0;
         HttpUtils.get(ApiUrls.HOME + "?index=" + currPageIndex, callback);
         //6.支持下拉刷新与滚动加载
         View view = inflater.inflate(layoutId, container, false);
         ButterKnife.bind(this, view);
         //编写下拉刷新事件的处理
         refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
             @Override
             public void onRefresh() {
                 //  1.清空数据
                 //  2.添加新获取的首页数据
                 //  3.列表刷新
                 Toast.makeText(getContext(), "下拉刷新中", Toast.LENGTH_SHORT).show();
                 currPageIndex = 0;
                 HttpUtils.get(ApiUrls.HOME + "?index=" + currPageIndex, callback);

             }
         });
         rv.setLoadMoreListener(new AutoLoadRecylerView.loadMoreListener() {
             //滚动到底部可以加载下一页数据
             @Override
             public void onLoadMore() {
                 if (currPageIndex == 2) {
                     Toast.makeText(getContext(), "没有更多记录", Toast.LENGTH_SHORT).show();
             } else {
                 Toast.makeText(getContext(), "加载更多中..", Toast.LENGTH_SHORT).show();
                 currPageIndex += 1;
                 HttpUtils.get(ApiUrls.HOME + "?index=" + currPageIndex, callback);
             }
             }
         });
         return view;
     }
     DefaultCallBack callback = new DefaultCallBack() {
         @Override
         public void onStart(int what) {
             super.onStart(what);
             if (currPageIndex == 0) {
                 refreshLayout.setRefreshing(true);
             }
         }
         @Override
         public void onFinish(int what) {
             super.onFinish(what);
             if (currPageIndex == 0) {
                 refreshLayout.setRefreshing(false);
             }
         }

         @Override
         protected void createView(String json) {
             //4.使用Gsonformat
             HomeNewData data = new Gson().fromJson(json, HomeNewData.class);
             System.out.println(data);
             if (currPageIndex == 0) //首页逻辑
             {
                 if (newAdapter == null) {//1.
                     //5.高级控件的显示
                     rv.setLayoutManager(new LinearLayoutManager(getContext()));
                     //设置适配器
                     newAdapter = new AppNewAdapter(data.list);
                     rv.setAdapter(newAdapter);
                 } else {
                     newAdapter.getData().clear();
                     //添加新获取的首页数据
                     newAdapter.getData().addAll(data.list);
                     newAdapter.notifyDataSetChanged();
                     Toast.makeText(getContext(), "下拉刷新成功", Toast.LENGTH_SHORT).show();
                 }
             } else {
                 //添加 下一页数据
                 newAdapter.getData().addAll(data.list);
                 newAdapter.notifyDataSetChanged();
                 Toast.makeText(getContext(), "加载更多完成", Toast.LENGTH_SHORT).show();
                 //加载完成，设置loading 为false可以加载下一页
                 rv.setLoading(false);
             }
         }
     };
 }