分页加载的Fragment

  1 package com.z.fragment;
  2 
  3 import android.os.Bundle;
  4 import android.os.Environment;
  5 import android.support.annotation.Nullable;
  6 import android.support.v4.app.Fragment;
  7 import android.support.v4.widget.SwipeRefreshLayout;
  8 import android.support.v7.widget.LinearLayoutManager;
  9 import android.view.LayoutInflater;
 10 import android.view.View;
 11 import android.view.ViewGroup;
 12 import android.widget.Toast;
 13 
 14 import com.google.gson.Gson;
 15 import com.    .MyApp;
 16 import com.z.  .R;
 17 import com.z..adapter.AppNewAdapter;
 18 import com.z..bean.HomeNewData;
 19 import com.z..utils.ApiUrls;
 20 import com.z..utils.DefaultCallBack;
 21 import com.z..utils.HttpUtils;
 22 import com.z..view.AutoLoadRecylerView;
 23 
 24 import butterknife.BindView;
 25 import butterknife.ButterKnife;
 26 
 27 public class HomeFragment extends Fragment {
 28     @BindView(R.id.rv)
 29     AutoLoadRecylerView rv;
 30     @BindView(R.id.refresh_layout)
 31     SwipeRefreshLayout refreshLayout;
 32     private AppNewAdapter newAdapter;
 33     private int currPageIndex = 0;
 34     @Nullable
 35     @Override
 36     public View onCreateView(LayoutInflater inflater, @Nullable final ViewGroup container, @Nullable Bundle savedInstanceState) {
 37         //1.布局xml|使用Code
 38         int layoutId = R.layout.fragment_home_new;
 39         //2.阅读接口文档
 40         //3.可在调试模式获取json
 41         currPageIndex = 0;
 42         HttpUtils.get(ApiUrls.HOME + "?index=" + currPageIndex, callback);
 43         //6.支持下拉刷新与滚动加载
 44         View view = inflater.inflate(layoutId, container, false);
 45         ButterKnife.bind(this, view);
 46         //编写下拉刷新事件的处理
 47         refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
 48             @Override
 49             public void onRefresh() {
 50                 //  1.清空数据
 51                 //  2.添加新获取的首页数据
 52                 //  3.列表刷新
 53                 Toast.makeText(getContext(), "下拉刷新中", Toast.LENGTH_SHORT).show();
 54                 currPageIndex = 0;
 55                 HttpUtils.get(ApiUrls.HOME + "?index=" + currPageIndex, callback);
 56 
 57             }
 58         });
 59         rv.setLoadMoreListener(new AutoLoadRecylerView.loadMoreListener() {
 60             //滚动到底部可以加载下一页数据
 61             @Override
 62             public void onLoadMore() {
 63                 if (currPageIndex == 2) {
 64                     Toast.makeText(getContext(), "没有更多记录", Toast.LENGTH_SHORT).show();
 65             } else {
 66                 Toast.makeText(getContext(), "加载更多中..", Toast.LENGTH_SHORT).show();
 67                 currPageIndex += 1;
 68                 HttpUtils.get(ApiUrls.HOME + "?index=" + currPageIndex, callback);
 69             }
 70             }
 71         });
 72         return view;
 73     }
 74     DefaultCallBack callback = new DefaultCallBack() {
 75         @Override
 76         public void onStart(int what) {
 77             super.onStart(what);
 78             if (currPageIndex == 0) {
 79                 refreshLayout.setRefreshing(true);
 80             }
 81         }
 82         @Override
 83         public void onFinish(int what) {
 84             super.onFinish(what);
 85             if (currPageIndex == 0) {
 86                 refreshLayout.setRefreshing(false);
 87             }
 88         }
 89 
 90         @Override
 91         protected void createView(String json) {
 92             //4.使用Gsonformat
 93             HomeNewData data = new Gson().fromJson(json, HomeNewData.class);
 94             System.out.println(data);
 95             if (currPageIndex == 0) //首页逻辑
 96             {
 97                 if (newAdapter == null) {//1.
 98                     //5.高级控件的显示
 99                     rv.setLayoutManager(new LinearLayoutManager(getContext()));
100                     //设置适配器
101                     newAdapter = new AppNewAdapter(data.list);
102                     rv.setAdapter(newAdapter);
103                 } else {
104                     newAdapter.getData().clear();
105                     //添加新获取的首页数据
106                     newAdapter.getData().addAll(data.list);
107                     newAdapter.notifyDataSetChanged();
108                     Toast.makeText(getContext(), "下拉刷新成功", Toast.LENGTH_SHORT).show();
109                 }
110             } else {
111                 //添加 下一页数据
112                 newAdapter.getData().addAll(data.list);
113                 newAdapter.notifyDataSetChanged();
114                 Toast.makeText(getContext(), "加载更多完成", Toast.LENGTH_SHORT).show();
115                 //加载完成，设置loading 为false可以加载下一页
116                 rv.setLoading(false);
117             }
118         }
119     };
120 }