content: package com.sqh.market.fragments;
  
  import android.content.Context;
  import android.content.Intent;
  import android.os.Bundle;
  import android.os.Handler;
  import android.os.Message;
  import android.support.annotation.Nullable;
  import android.support.v4.app.Fragment;
  import android.support.v4.widget.SwipeRefreshLayout;
  import android.util.Log;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.AdapterView;
  import android.widget.ListView;
  import android.widget.SearchView;
  import android.widget.Toast;
  
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.JSONObject;
  import com.sqh.market.R;
  import com.sqh.market.activity.DetailsActivity;
  import com.sqh.market.activity.SearchViewActivity;
  import com.sqh.market.adapter.CommodityItemAdapter;
  import com.sqh.market.adapter.MenuDialogAdapter;
  import com.sqh.market.constant.Constants;
  import com.sqh.market.models.CommodityModel;
  import com.sqh.market.models.CommodityTypeModel;
  import com.sqh.market.utils.NetUtil;
  
  import java.io.IOException;
  import java.util.List;
  
  import okhttp3.Call;
  import okhttp3.Callback;
  import okhttp3.Response;
  
  /**
   * 主要Activity，使用时需要改成FragmentActivity
   * Created by 郑龙 on 2017/7/10.
   */
  
  public class Classify extends Fragment {
      private Handler handler;
  
      private Context mContext;
      private ListView mCommodityTypeListView, mCommodityListView;
      private MenuDialogAdapter mListView1Adapter;
      private CommodityItemAdapter mListView2Adapter;
      /**
       * 搜索框
       */
      private SearchView searchView;
  
      private View mProgressBar;
  
      /**
       * 商品类型菜单list数据源
       */
      private List<CommodityTypeModel> commodityTypeList;
  
      /**
       * 商品List数据源
       */
      private List<CommodityModel> commodityList;
  
      /**
       * 用于从网络初始化UI的handler
       */
      private Handler uiHandler = new Handler() {
          @Override
          public void handleMessage(Message msg) {
              switch (msg.what) {
                  case -1:
                      //网络请求失败
                      Toast.makeText(mContext, "网络请求失败！获取商品类别失败！", Toast.LENGTH_SHORT).show();
                      break;
                  case 0:
                      //网络请求成功，但是返回状态为失败
                      Toast.makeText(mContext, msg.obj.toString(), Toast.LENGTH_SHORT).show();
                      break;
                  case 1:
                      //网络请求商品类别返回成功时，初始化控件
                      //绑定数据以及设置Adapter
                      mListView1Adapter = new MenuDialogAdapter(mContext, commodityTypeList);
                      mCommodityTypeListView.setAdapter(mListView1Adapter);
                      break;
                  case 2:
                      //成功获取商品列表
                      if (mListView2Adapter == null) {
                          mListView2Adapter = new CommodityItemAdapter(mContext, commodityList, handler);//方便调试时Toast输出提示所以传入Handler，否则可用上一个
                          mCommodityListView.setAdapter(mListView2Adapter);
                      } else {
                          mListView2Adapter.setData(commodityList);
                          mListView2Adapter.notifyDataSetChanged();//刷新
                      }
                      break;
  
              }
  
              //显示列表，隐藏进度条
              loadingAnim(false);
          }
      };
  
      @Nullable
      @Override
      public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
          View view = inflater.inflate(R.layout.fragment_classify, null);
          mContext = getActivity();
  
          //加载view
          initViews(view);
  
          //从服务器获取商品类别列表
          getDataFromServer();
  
          handler = new Handler();
  
  
          //设置searchView点击事件
          setSearchViewIntent();
  
          return view;
      }
  
      /**
       * searchView点击跳转
       */
      public void setSearchViewIntent() {
          searchView.setFocusable(false);
          searchView.clearFocus();
  
          //设置搜索框焦点
          searchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {
              @Override
              public void onFocusChange(View v, boolean hasFocus) {
                  if (hasFocus)
                      searchView.clearFocus();
                  else {
                      Intent intent = new Intent(getActivity(), SearchViewActivity.class);
                      intent.putExtra("fatherName", ".Classify");
                      startActivityForResult(intent, 1);
                  }
              }
          });
      }
  
  
      /**
       * 从网络获取初始数据
       */
      private void getDataFromServer() {
          String categoryTypeUrl = Constants.BASE_URL + Constants.GET_COMMODITY_TYPES_URL;
          NetUtil.doGet(categoryTypeUrl, new Callback() {
              @Override
              public void onFailure(Call call, IOException e) {
                  Log.e("网络请求失败！", "网络请求失败！获取商品类别列表失败！");
                  Message message = Message.obtain();
                  message.what = -1;
                  uiHandler.sendMessage(message);
              }
  
              @Override
              public void onResponse(Call call, Response response) throws IOException {
                  String result = response.body().string().trim();
                  com.alibaba.fastjson.JSONObject obj = JSON.parseObject(result);
  
                  Message message = Message.obtain();
                  if (obj.getBoolean("flag")) {
                      message.what = 1;
                      //获得商品类型数据
                      List<CommodityTypeModel> types = com.alibaba.fastjson.JSONArray
                              .parseArray(JSON.toJSONString(obj.get("data"))
                                      , CommodityTypeModel.class);
                      commodityTypeList = types;
                  } else {
                      message.what = 0;
                  }
  
                  message.obj = obj.getString("message");
                  uiHandler.sendMessage(message);
              }
          });
      }
  
  
      /**
       * 通过商品类别id获取商品列表
       *
       * @param typeId 商品类别id
       */
      private void getCommodityFromServerByTypeId(Long typeId) {
          //拼接访问字符串
          String url = Constants.BASE_URL + Constants.GET_COMMODITY_URL;
          if (typeId != null && typeId > 0L) {
              url = url + "?commodityType=" + typeId;
          }
  
          NetUtil.doGet(url, new Callback() {
              @Override
              public void onFailure(Call call, IOException e) {
                  Log.e("网络请求失败！", "网络请求失败！获取商品列表失败！");
                  Message message = Message.obtain();
                  message.what = -1;
                  uiHandler.sendMessage(message);
              }
  
              @Override
              public void onResponse(Call call, Response response) throws IOException {
                  String result = response.body().string().trim();
                  com.alibaba.fastjson.JSONObject obj = JSON.parseObject(result);
  
                  Message message = Message.obtain();
                  if (obj.getBoolean("flag")) {
                      message.what = 2;
  
                      //拿到data内数据
                      JSONObject data = (JSONObject) obj.get("data");
  
                      //获得商品类型数据
                      List<CommodityModel> types = com.alibaba.fastjson.JSONArray
                              .parseArray(JSON.toJSONString(data.get("lists"))
                                      , CommodityModel.class);
                      commodityList = types;
                  } else {
                      message.what = 0;
                  }
  
                  message.obj = obj.getString("message");
                  uiHandler.sendMessage(message);
              }
          });
      }
  
      /**
       * 当进行网络请求时，播放进度条动画
       *
       * @param isLoading 是否正在网络请求
       */
      private void loadingAnim(boolean isLoading) {
          mProgressBar.setVisibility(isLoading ? View.VISIBLE : View.GONE);
          mCommodityListView.setVisibility(isLoading ? View.GONE : View.VISIBLE);
      }
  
      /**
       * 绑定操作控件
       *
       * @param view
       */
      private void initViews(View view) {
          //一级菜单，绑定两个ListView控件
          mCommodityTypeListView = view.findViewById(R.id.left);
          mCommodityListView = view.findViewById(R.id.right);
          mProgressBar = view.findViewById(R.id.progress);
  
          searchView = view.findViewById(R.id.home_serachview);
  
          //商品类别菜单点击事件
          mCommodityTypeListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
              @Override
              public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                  if (mListView1Adapter != null) {
                      mListView1Adapter.setSelectedPos(position);
                  }
                  if (mListView2Adapter != null) {
                      mListView2Adapter.setSelectedPos(-1);
                  }
  
                  CommodityTypeModel menuData = (CommodityTypeModel) parent.getItemAtPosition(position);
  
                  //根据类型id从服务器获取商品列表
                  getCommodityFromServerByTypeId(menuData.getId());
                  //加载中动效
                  loadingAnim(true);
              }
          });
  
          //商品item点击事件
          mCommodityListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
              @Override
              public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
                  CommodityModel commodity = (CommodityModel) adapterView.getItemAtPosition(position);
                  //跳转到详情
                  Intent intent = new Intent(getActivity(), DetailsActivity.class);
                  intent.putExtra("id", commodity.getId() + "");
                  startActivity(intent);
              }
          });
      }
  
  }
  