搜索商品，实现网格布局

逃离我推掉我的手 2022-06-03 05:55 250阅读 0赞

效果图：
这里写图片描述
这里写图片描述

网络权限：

  1. <uses-permission android:name="android.permission.INTERNET"/>
  2.     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

注意事项

这里写图片描述

添加依赖：

  1. //okhttp3 compile 'com.squareup.okhttp3:okhttp:3.9.0' //图片Glide compile 'com.github.bumptech.glide:glide:3.7.0' //Gson compile 'com.google.code.gson:gson:2.8.1' //刷新pullToRefresh compile 'com.jwenfeng.pulltorefresh:library:1.0.3' compile 'com.jcodecraeer:xrecyclerview:1.2.6' //黄油刀 compile 'com.jakewharton:butterknife:8.8.1' compile 'com.squareup.okio:okio:1.5.0' compile 'com.squareup.okhttp3:logging-interceptor:3.4.1' compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5' compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'

在activity_main.xml中的布局：

  1. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.zhokaosansousuo.MainActivity" android:orientation="vertical">
  3.     <LinearLayout android:layout_width="match_parent" android:layout_height="40dp" android:orientation="horizontal">
  5.         <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:text="搜索商品" android:textSize="22sp" />
  7.         <ImageView android:id="@+id/qieHuanIv" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="9" android:src="@mipmap/lv_icon" android:onClick="qieHuan" android:padding="10dp" />
  8.     </LinearLayout>
  10.     <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:padding="7dp">
  12.         <EditText android:id="@+id/edt_shurukuang" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="2" android:hint="请输入关键词搜索" />
  14.         <Button android:id="@+id/sousuoBut" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="8" android:onClick="souSuoBut" android:text="搜索" />
  15.     </LinearLayout>
  17.     <com.jcodecraeer.xrecyclerview.XRecyclerView android:id="@+id/xRecView" android:layout_width="wrap_content" android:layout_height="wrap_content">
  19.     </com.jcodecraeer.xrecyclerview.XRecyclerView>
  22. </LinearLayout>

在创建一个Xrecview.xml布局：（适配器的item布局）

  1. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">
  3.     <ImageView android:id="@+id/xRecView_itemsj_iv" android:layout_width="100dp" android:layout_height="100dp" android:scaleType="fitXY" android:src="@mipmap/ic_launcher"/>
  4.     <LinearLayout android:layout_width="match_parent" android:layout_height="100dp" android:orientation="vertical" android:gravity="center_vertical">
  5.         <TextView android:id="@+id/xRecView_itemsj_titel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="标题" android:singleLine="true" android:textSize="22sp"/>
  6.         <TextView android:id="@+id/xRecView_itemsj_yuanJia" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="10000"/>
  7.         <TextView android:id="@+id/xRecView_itemsj_xianJia" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="50" android:textColor="@color/colorAccent"/>
  8.     </LinearLayout>
  10. </LinearLayout>

MainActivity :

  1. public class MainActivity extends AppCompatActivity { 
  3.     private boolean b = false;
  4.     private boolean sjBJB = false;
  5.     private ImageView qhIv;
  6.     private EditText srkEdt;
  7.     private XRecyclerView xRecView;
  8.     private XRecAdapterSJ xRecAdapterSJ;
  9.     private XRecAdapterBJB xRecAdapterBJB;
  10.     private List<SJBean.DataBean> sjList;
  11.     private List<BJBean.DataBean> bjbList;
  12.     private String srkStr;
  15.     @Override
  16.     protected void onCreate(Bundle savedInstanceState) {
  17.         super.onCreate(savedInstanceState);
  18.         setContentView(R.layout.activity_main);
  21.         initView();
  22.         initDataSJ();
  23.     }
  25.     private void initDataBJB() {
  26.         Map<String, String> mapBJB = new HashMap<>();
  27.         mapBJB.put("keywords", "笔记本");
  28.         mapBJB.put("page", "1");
  29.         mapBJB.put("source", "2");
  30.         OkHttp3Utils.doPost(URLs.SHANGPIN, mapBJB, new GsonObjectCallback<BJBean>() {
  32.             @Override
  33.             public void onUi(BJBean bjbBean) {
  34.                 bjbList = bjbBean.getData();
  35.                 xRecView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
  36.                 xRecAdapterBJB = new XRecAdapterBJB(bjbList, MainActivity.this);
  37.                 xRecView.setAdapter(xRecAdapterBJB);
  38.             }
  40.             @Override
  41.             public void onFailed(Call call, IOException e) {
  43.             }
  44.         });
  45.     }
  47.     private void initDataSJ() {
  48.         Map<String, String> mapSJ = new HashMap<>();
  49.         mapSJ.put("keywords", "手机");
  50.         mapSJ.put("page", "1");
  51.         mapSJ.put("source", "1");
  52.         OkHttp3Utils.doPost(URLs.SHANGPIN, mapSJ, new GsonObjectCallback<SJBean>() {
  54.             @Override
  55.             public void onUi(SJBean sjBean) {
  56.                 sjList = sjBean.getData();
  57.                 xRecAdapterSJ = new XRecAdapterSJ(sjList, MainActivity.this);
  58.                 xRecView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
  59.                 xRecView.setAdapter(xRecAdapterSJ);
  60.             }
  62.             @Override
  63.             public void onFailed(Call call, IOException e) {
  65.             }
  66.         });
  69.     }
  71.     private void initView() {
  72.         qhIv = (ImageView) findViewById(R.id.qieHuanIv);
  73.         srkEdt = (EditText) findViewById(R.id.edt_shurukuang);
  74.         xRecView = (XRecyclerView) findViewById(R.id.xRecView);
  75.         initFresh();
  77.     }
  79.     private void initFresh() {
  80.         xRecView.setLoadingListener(new XRecyclerView.LoadingListener() {
  81.             @Override
  82.             public void onRefresh() {
  83.                 if (sjList != null) {
  84.                     initDataSJ();
  85.                     xRecAdapterSJ.notifyDataSetChanged();
  86.                 }
  87.                 xRecView.refreshComplete();
  88.                 Toast.makeText(MainActivity.this, "刷新了数据", Toast.LENGTH_SHORT).show();
  89.             }
  91.             @Override
  92.             public void onLoadMore() {
  93.                 if (sjList != null) {
  94.                     sjList.addAll(sjList.size(), sjList);
  95.                     xRecAdapterSJ.notifyDataSetChanged();
  96.                 }
  97.                 xRecView.loadMoreComplete();
  98.                 Toast.makeText(MainActivity.this, "加载了数据", Toast.LENGTH_SHORT).show();
  99.             }
  100.         });
  101.     }
  103.     public void qieHuan(View view) {
  105.         Toast.makeText(MainActivity.this, "点击了切换视图按钮", Toast.LENGTH_SHORT).show();
  106.         if (b == true) {
  107.             //点击后想要变成什么要的布局样式就搞一个你的需求
  108.             xRecView.setLayoutManager(new GridLayoutManager(MainActivity.this, 2));
  109.             //给布尔值重新赋值
  110.             b = false;
  111.             //给点击按钮的图片重新赋值
  112.             qhIv.setImageResource(R.mipmap.lv_icon);
  113.         } else if (b == false) {
  114.             xRecView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
  115.             //给布尔值重新赋值
  116.             b = true;
  117.             //给点击按钮的图片重新赋值
  118.             qhIv.setImageResource(R.mipmap.grid_icon);
  119.         }//
  121.     }
  123.     public void souSuoBut(View view) {
  124.         srkStr = srkEdt.getText().toString();
  125.         Log.e("++++++", "这是输入框的返回字符串内容：" + srkStr);
  126.         if (srkStr.equals("")) {
  127.    //
  128.             Toast.makeText(MainActivity.this, "请输入内容", Toast.LENGTH_SHORT).show();
  129.         } else if (srkStr.equals("sj")) {
  130.             initDataSJ();
  131.             Toast.makeText(MainActivity.this, "展示手机的数据", Toast.LENGTH_SHORT).show();
  132.         } else if (srkStr.equals("bjb")) {
  133.             initDataBJB();
  134.             Toast.makeText(MainActivity.this, "展示笔记本的数据", Toast.LENGTH_SHORT).show();
  135.         }
  136.     }
  140. }

在创建一个URLs类：

  1. public class URLs {
  3.     public static final String SHANGPIN = "http://120.27.23.105/product/searchProducts";
  5. }

创建一个bean包\包里有两个bean

一个是BJBean类：

  1. public class BJBean {
  3.     /**
  4.      * msg : 查询成功
  5.      * code : 0
  6.      * data : [{
  7.    "bargainPrice":11800,"createtime":"2017-10-10T17:33:37","detailUrl":"https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5Nc3a7dab5.jpg!q70.jpg","itemtype":0,"pid":57,"price":5199,"pscid":40,"salenum":4343,"sellerid":1,"subhead":"【i5 MX150 2G显存】全高清窄边框 8G内存 256固态硬盘 支持指纹识别 预装WIN10系统","title":"小米(MI)Air 13.3英寸全金属轻薄笔记本(i5-7200U 8G 256G PCle SSD MX150 2G独显 FHD 指纹识别 Win10）银\r\n"},{
  8.    "bargainPrice":11800,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/5025518.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t8830/106/1760940277/195595/5cf9412f/59bf2ef5N5ab7dc16.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5428/70/1520969931/274676/b644dd0d/591128e7Nd2f70da0.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5566/365/1519564203/36911/620c750c/591128eaN54ac3363.jpg!q70.jpg","itemtype":1,"pid":58,"price":6399,"pscid":40,"salenum":545,"sellerid":2,"subhead":"升级4G大显存！Nvme协议Pcie SSD,速度快人一步】GTX1050Ti就选拯救者！专业游戏键盘&新模具全新设计！","title":"联想(Lenovo)拯救者R720 15.6英寸游戏笔记本电脑(i5-7300HQ 8G 1T+128G SSD GTX1050Ti 4G IPS 黑)"},{
  9.    "bargainPrice":5599,"createtime":"2017-10-10T17:30:32","detailUrl":"https://item.m.jd.com/product/4824715.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n12/jfs/t7768/184/1153704394/148460/f42e1432/599a930fN8a85626b.jpg!q70.jpg","itemtype":0,"pid":59,"price":5599,"pscid":40,"salenum":675,"sellerid":3,"subhead":"游戏本选择4G独显，拒绝掉帧】升级版IPS全高清防眩光显示屏，WASD方向键颜色加持，三大出风口立体散热！","title":"戴尔DELL灵越游匣15PR-6648B GTX1050 15.6英寸游戏笔记本电脑(i5-7300HQ 8G 128GSSD+1T 4G独显 IPS)黑"},{
  10.    "bargainPrice":11800,"createtime":"2017-10-14T21:48:08","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","itemtype":2,"pid":60,"price":13888,"pscid":40,"salenum":466,"sellerid":4,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"},{
  11.    "bargainPrice":11800,"createtime":"2017-10-14T21:38:26","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","itemtype":1,"pid":61,"price":14999,"pscid":40,"salenum":5535,"sellerid":5,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"},{
  12.    "bargainPrice":11800,"createtime":"2017-10-03T23:53:28","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","itemtype":0,"pid":62,"price":15999,"pscid":40,"salenum":43,"sellerid":6,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"},{
  13.    "bargainPrice":11800,"createtime":"2017-10-14T21:38:26","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","itemtype":1,"pid":63,"price":10000,"pscid":40,"salenum":3232,"sellerid":7,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"},{
  14.    "bargainPrice":11800,"createtime":"2017-10-03T23:43:53","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","itemtype":0,"pid":64,"price":11000,"pscid":40,"salenum":0,"sellerid":8,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"},{
  15.    "bargainPrice":11800,"createtime":"2017-10-14T21:48:08","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","itemtype":2,"pid":65,"price":12000,"pscid":40,"salenum":868,"sellerid":9,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"},{
  16.    "bargainPrice":11800,"createtime":"2017-10-14T21:38:26","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","itemtype":1,"pid":66,"price":13000,"pscid":40,"salenum":7676,"sellerid":10,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"}]
  17.      * page : 1
  18.      */
  20.     private String msg;
  21.     private String code;
  22.     private String page;
  23.     private List<DataBean> data;
  25.     public String getMsg() {
  26.         return msg;
  27.     }
  29.     public void setMsg(String msg) {
  30.         this.msg = msg;
  31.     }
  33.     public String getCode() {
  34.         return code;
  35.     }
  37.     public void setCode(String code) {
  38.         this.code = code;
  39.     }
  41.     public String getPage() {
  42.         return page;
  43.     }
  45.     public void setPage(String page) {
  46.         this.page = page;
  47.     }
  49.     public List<DataBean> getData() {
  50.         return data;
  51.     }
  53.     public void setData(List<DataBean> data) {
  54.         this.data = data;
  55.     }
  57.     public static class DataBean {
  58.         /**
  59.          * bargainPrice : 11800.0
  60.          * createtime : 2017-10-10T17:33:37
  61.          * detailUrl : https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends
  62.          * images : https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5Nc3a7dab5.jpg!q70.jpg
  63.          * itemtype : 0
  64.          * pid : 57
  65.          * price : 5199.0
  66.          * pscid : 40
  67.          * salenum : 4343
  68.          * sellerid : 1
  69.          * subhead : 【i5 MX150 2G显存】全高清窄边框 8G内存 256固态硬盘 支持指纹识别 预装WIN10系统
  70.          * title : 小米(MI)Air 13.3英寸全金属轻薄笔记本(i5-7200U 8G 256G PCle SSD MX150 2G独显 FHD 指纹识别 Win10）银
  72.          */
  74.         private double bargainPrice;
  75.         private String createtime;
  76.         private String detailUrl;
  77.         private String images;
  78.         private int itemtype;
  79.         private int pid;
  80.         private double price;
  81.         private int pscid;
  82.         private int salenum;
  83.         private int sellerid;
  84.         private String subhead;
  85.         private String title;
  87.         public double getBargainPrice() {
  88.             return bargainPrice;
  89.         }
  91.         public void setBargainPrice(double bargainPrice) {
  92.             this.bargainPrice = bargainPrice;
  93.         }
  95.         public String getCreatetime() {
  96.             return createtime;
  97.         }
  99.         public void setCreatetime(String createtime) {
  100.             this.createtime = createtime;
  101.         }
  103.         public String getDetailUrl() {
  104.             return detailUrl;
  105.         }
  107.         public void setDetailUrl(String detailUrl) {
  108.             this.detailUrl = detailUrl;
  109.         }
  111.         public String getImages() {
  112.             return images;
  113.         }
  115.         public void setImages(String images) {
  116.             this.images = images;
  117.         }
  119.         public int getItemtype() {
  120.             return itemtype;
  121.         }
  123.         public void setItemtype(int itemtype) {
  124.             this.itemtype = itemtype;
  125.         }
  127.         public int getPid() {
  128.             return pid;
  129.         }
  131.         public void setPid(int pid) {
  132.             this.pid = pid;
  133.         }
  135.         public double getPrice() {
  136.             return price;
  137.         }
  139.         public void setPrice(double price) {
  140.             this.price = price;
  141.         }
  143.         public int getPscid() {
  144.             return pscid;
  145.         }
  147.         public void setPscid(int pscid) {
  148.             this.pscid = pscid;
  149.         }
  151.         public int getSalenum() {
  152.             return salenum;
  153.         }
  155.         public void setSalenum(int salenum) {
  156.             this.salenum = salenum;
  157.         }
  159.         public int getSellerid() {
  160.             return sellerid;
  161.         }
  163.         public void setSellerid(int sellerid) {
  164.             this.sellerid = sellerid;
  165.         }
  167.         public String getSubhead() {
  168.             return subhead;
  169.         }
  171.         public void setSubhead(String subhead) {
  172.             this.subhead = subhead;
  173.         }
  175.         public String getTitle() {
  176.             return title;
  177.         }
  179.         public void setTitle(String title) {
  180.             this.title = title;
  181.         }
  182.     }
  183. }

第二个是SJBean类：

  1. public class SJBean {
  2.     /**
  3.      * msg : 查询成功
  4.      * code : 0
  5.      * data : [{
  6.    "bargainPrice":99,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/4345173.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6037/35/2944615848/95178/6cd6cff0/594a3a10Na4ec7f39.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6607/258/1025744923/75738/da120a2d/594a3a12Ne3e6bc56.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6370/292/1057025420/64655/f87644e3/594a3a12N5b900606.jpg!q70.jpg","itemtype":1,"pid":45,"price":2999,"pscid":39,"salenum":4666,"sellerid":1,"subhead":"高清双摄，就是清晰！2000+1600万高清摄像头，6GB大内存+高通骁龙835处理器，性能怪兽！","title":"一加手机5 (A5000) 6GB+64GB 月岩灰 全网通 双卡双待 移动联通电信4G手机"},{
  7.    "bargainPrice":6666,"createtime":"2017-10-10T16:01:31","detailUrl":"https://item.m.jd.com/product/5089273.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t8284/363/1326459580/71585/6d3e8013/59b857f2N6ca75622.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t9346/182/1406837243/282106/68af5b54/59b8480aNe8af7f5c.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8434/54/1359766007/56140/579509d9/59b85801Nfea207db.jpg!q70.jpg","itemtype":0,"pid":46,"price":234,"pscid":39,"salenum":868,"sellerid":2,"subhead":"【iPhone新品上市】新一代iPhone，让智能看起来更不一样","title":"Apple iPhone 8 Plus (A1864) 64GB 金色 移动联通电信4G手机"},{
  8.    "bargainPrice":1599,"createtime":"2017-10-14T21:48:08","detailUrl":"https://item.m.jd.com/product/1993026402.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t5863/302/8961270302/97126/41feade1/5981c81cNc1b1fbef.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7003/250/1488538438/195825/53bf31ba/5981c57eN51e95176.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5665/100/8954482513/43454/418611a9/5981c57eNd5fc97ba.jpg!q70.jpg","itemtype":2,"pid":47,"price":111,"pscid":39,"salenum":757,"sellerid":3,"subhead":"碳黑色 32GB 全网通 官方标配 1件","title":"锤子 坚果Pro 特别版 巧克力色 酒红色 全网通 移动联通电信4G手机 双卡双待 碳黑色 32GB 全网通"},{
  9.    "bargainPrice":3455,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/12224420750.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8803/356/1478945529/489755/2a163ace/59ba5e84N7bb9a666.jpg!q70.jpg","itemtype":1,"pid":48,"price":222,"pscid":39,"salenum":656,"sellerid":4,"subhead":"【现货新品抢购】全面屏2.0震撼来袭，骁龙835处理器，四曲面陶瓷机","title":"小米（MI） 小米MIX2 手机 黑色 全网通 (6GB+64GB)【标配版】"},{
  10.    "bargainPrice":1999,"createtime":"2017-10-10T16:09:02","detailUrl":"https://item.m.jd.com/product/5025971.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t7210/232/3738666823/232298/9004583e/59c3a9a7N8de42e15.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8356/82/2107423621/109733/c019b8c6/59c3a9a6Ne9a4bdd7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t10219/74/25356012/171379/7d55e296/59c3a9a8N82fa6e02.jpg!q70.jpg","itemtype":0,"pid":49,"price":333,"pscid":39,"salenum":123,"sellerid":5,"subhead":"vivo X20 带你开启全面屏时代！逆光也清晰，照亮你的美！","title":"vivo X20 全面屏手机 全网通 4GB+64GB 金色 移动联通电信4G手机 双卡双待"},{
  11.    "bargainPrice":3455,"createtime":"2017-10-14T21:48:08","detailUrl":"https://item.m.jd.com/product/12224420750.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8803/356/1478945529/489755/2a163ace/59ba5e84N7bb9a666.jpg!q70.jpg","itemtype":2,"pid":50,"price":444,"pscid":39,"salenum":54,"sellerid":6,"subhead":"【现货新品抢购】全面屏2.0震撼来袭，骁龙835处理器，四曲面陶瓷机","title":"小米（MI） 小米MIX2 手机 黑色 全网通 (6GB+64GB)【标配版】"},{
  12.    "bargainPrice":3455,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/12224420750.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8803/356/1478945529/489755/2a163ace/59ba5e84N7bb9a666.jpg!q70.jpg","itemtype":1,"pid":51,"price":555,"pscid":39,"salenum":424,"sellerid":7,"subhead":"【现货新品抢购】全面屏2.0震撼来袭，骁龙835处理器，四曲面陶瓷机","title":"小米（MI） 小米MIX2 手机 黑色 全网通 (6GB+64GB)【标配版】"},{
  13.    "bargainPrice":3455,"createtime":"2017-10-03T23:53:28","detailUrl":"https://item.m.jd.com/product/12224420750.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8803/356/1478945529/489755/2a163ace/59ba5e84N7bb9a666.jpg!q70.jpg","itemtype":0,"pid":52,"price":666,"pscid":39,"salenum":212,"sellerid":8,"subhead":"【现货新品抢购】全面屏2.0震撼来袭，骁龙835处理器，四曲面陶瓷机","title":"小米（MI） 小米MIX2 手机 黑色 全网通 (6GB+64GB)【标配版】"},{
  14.    "bargainPrice":2999,"createtime":"2017-10-14T21:48:08","detailUrl":"https://item.m.jd.com/product/2385655.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t2068/298/2448145915/157953/7be197df/56d51a42Nd86f1c8e.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2437/128/1687178395/117431/bcc190c1/56d3fcbaNb2963d21.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2467/222/2263160610/95597/927b8a2f/56d3eafeNdecebeb6.jpg!q70.jpg","itemtype":2,"pid":53,"price":777,"pscid":39,"salenum":0,"sellerid":9,"subhead":"Super AMOLED三星双曲面2K 屏，支持无线充电！","title":"三星 Galaxy S7 edge（G9350）4GB+32GB 铂光金 移动联通电信4G手机 双卡双待"},{
  15.    "bargainPrice":3455,"createtime":"2017-10-03T23:53:28","detailUrl":"https://item.m.jd.com/product/12224420750.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t9106/106/1785172479/537280/253bc0ab/59bf78a7N057e5ff7.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8461/5/1492479653/68388/7255e013/59ba5e84N91091843.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8803/356/1478945529/489755/2a163ace/59ba5e84N7bb9a666.jpg!q70.jpg","itemtype":0,"pid":54,"price":888,"pscid":39,"salenum":7575,"sellerid":10,"subhead":"【现货新品抢购】全面屏2.0震撼来袭，骁龙835处理器，四曲面陶瓷机","title":"小米（MI） 小米MIX2 手机 黑色 全网通 (6GB+64GB)【标配版】"}]
  16.      * page : 1
  17.      */
  19.     private String msg;
  20.     private String code;
  21.     private String page;
  22.     private List<DataBean> data;
  24.     public String getMsg() {
  25.         return msg;
  26.     }
  28.     public void setMsg(String msg) {
  29.         this.msg = msg;
  30.     }
  32.     public String getCode() {
  33.         return code;
  34.     }
  36.     public void setCode(String code) {
  37.         this.code = code;
  38.     }
  40.     public String getPage() {
  41.         return page;
  42.     }
  44.     public void setPage(String page) {
  45.         this.page = page;
  46.     }
  48.     public List<DataBean> getData() {
  49.         return data;
  50.     }
  52.     public void setData(List<DataBean> data) {
  53.         this.data = data;
  54.     }
  56.     public static class DataBean {
  57.         /**
  58.          * bargainPrice : 99.0
  59.          * createtime : 2017-10-14T21:38:26
  60.          * detailUrl : https://item.m.jd.com/product/4345173.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends
  61.          * images : https://m.360buyimg.com/n0/jfs/t6037/35/2944615848/95178/6cd6cff0/594a3a10Na4ec7f39.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6607/258/1025744923/75738/da120a2d/594a3a12Ne3e6bc56.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6370/292/1057025420/64655/f87644e3/594a3a12N5b900606.jpg!q70.jpg
  62.          * itemtype : 1
  63.          * pid : 45
  64.          * price : 2999.0
  65.          * pscid : 39
  66.          * salenum : 4666
  67.          * sellerid : 1
  68.          * subhead : 高清双摄，就是清晰！2000+1600万高清摄像头，6GB大内存+高通骁龙835处理器，性能怪兽！
  69.          * title : 一加手机5 (A5000) 6GB+64GB 月岩灰 全网通 双卡双待 移动联通电信4G手机
  70.          */
  72.         private double bargainPrice;
  73.         private String createtime;
  74.         private String detailUrl;
  75.         private String images;
  76.         private int itemtype;
  77.         private int pid;
  78.         private double price;
  79.         private int pscid;
  80.         private int salenum;
  81.         private int sellerid;
  82.         private String subhead;
  83.         private String title;
  85.         public double getBargainPrice() {
  86.             return bargainPrice;
  87.         }
  89.         public void setBargainPrice(double bargainPrice) {
  90.             this.bargainPrice = bargainPrice;
  91.         }
  93.         public String getCreatetime() {
  94.             return createtime;
  95.         }
  97.         public void setCreatetime(String createtime) {
  98.             this.createtime = createtime;
  99.         }
  101.         public String getDetailUrl() {
  102.             return detailUrl;
  103.         }
  105.         public void setDetailUrl(String detailUrl) {
  106.             this.detailUrl = detailUrl;
  107.         }
  109.         public String getImages() {
  110.             return images;
  111.         }
  113.         public void setImages(String images) {
  114.             this.images = images;
  115.         }
  117.         public int getItemtype() {
  118.             return itemtype;
  119.         }
  121.         public void setItemtype(int itemtype) {
  122.             this.itemtype = itemtype;
  123.         }
  125.         public int getPid() {
  126.             return pid;
  127.         }
  129.         public void setPid(int pid) {
  130.             this.pid = pid;
  131.         }
  133.         public double getPrice() {
  134.             return price;
  135.         }
  137.         public void setPrice(double price) {
  138.             this.price = price;
  139.         }
  141.         public int getPscid() {
  142.             return pscid;
  143.         }
  145.         public void setPscid(int pscid) {
  146.             this.pscid = pscid;
  147.         }
  149.         public int getSalenum() {
  150.             return salenum;
  151.         }
  153.         public void setSalenum(int salenum) {
  154.             this.salenum = salenum;
  155.         }
  157.         public int getSellerid() {
  158.             return sellerid;
  159.         }
  161.         public void setSellerid(int sellerid) {
  162.             this.sellerid = sellerid;
  163.         }
  165.         public String getSubhead() {
  166.             return subhead;
  167.         }
  169.         public void setSubhead(String subhead) {
  170.             this.subhead = subhead;
  171.         }
  173.         public String getTitle() {
  174.             return title;
  175.         }
  177.         public void setTitle(String title) {
  178.             this.title = title;
  179.         }
  180.     }
  182. }

创建一个Utils包：包里面有四个类

第一个类是OKHttp3Utils

  1. public class OkHttp3Utils { 
  2.     /** * 懒汉 安全 加同步 * 私有的静态成员变量 只声明不创建 * 私有的构造方法 * 提供返回实例的静态方法 */
  4.     private static OkHttp3Utils okHttp3Utils = null;
  6.     private OkHttp3Utils() {
  7.     }
  9.     public static OkHttp3Utils getInstance() {
  10.         if (okHttp3Utils == null) {
  11.             //加同步安全
  12.             synchronized (OkHttp3Utils.class) {
  13.                 if (okHttp3Utils == null) {
  14.                     okHttp3Utils = new OkHttp3Utils();
  15.                 }
  16.             }
  18.         }
  20.         return okHttp3Utils;
  21.     }
  23.     private static OkHttpClient okHttpClient = null;
  25.     public synchronized static OkHttpClient getOkHttpClient() {
  26.         if (okHttpClient == null) {
  27.             //判空 为空创建实例
  28.             // okHttpClient = new OkHttpClient();
  29. /** * 和OkHttp2.x有区别的是不能通过OkHttpClient直接设置超时时间和缓存了，而是通过OkHttpClient.Builder来设置， * 通过builder配置好OkHttpClient后用builder.build()来返回OkHttpClient， * 所以我们通常不会调用new OkHttpClient()来得到OkHttpClient，而是通过builder.build()： */
  30.             // File sdcache = getExternalCacheDir();
  31.             //缓存目录
  32.             File sdcache = new File(Environment.getExternalStorageDirectory(), "cache");
  33.             int cacheSize = 10 * 1024 * 1024;
  34.             //OkHttp3拦截器
  35.             HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
  36.                 @Override
  37.                 public void log(String message) {
  38.                     Log.i("xxx", message.toString());
  39.                 }
  40.             });
  41.             //Okhttp3的拦截器日志分类 4种
  42.             httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
  45.             okHttpClient = new OkHttpClient.Builder().connectTimeout(15, TimeUnit.SECONDS)
  46.                     //添加OkHttp3的拦截器
  47.                     .addInterceptor(httpLoggingInterceptor)
  48.                     .addNetworkInterceptor(new CacheInterceptor())
  49.                     .writeTimeout(20, TimeUnit.SECONDS).readTimeout(20, TimeUnit.SECONDS)
  50.                     .cache(new Cache(sdcache.getAbsoluteFile(), cacheSize))
  51.                     .build();
  52.         }
  53.         return okHttpClient;
  54.     }
  56.     private static Handler mHandler = null;
  58.     public synchronized static Handler getHandler() {
  59.         if (mHandler == null) {
  60.             mHandler = new Handler();
  61.         }
  63.         return mHandler;
  64.     }
  66.     /** * get请求 * 参数1 url * 参数2 回调Callback */
  68.     public static void doGet(String url, Callback callback) {
  70.         //创建OkHttpClient请求对象
  71.         OkHttpClient okHttpClient = getOkHttpClient();
  72.         //创建Request
  73.         Request request = new Request.Builder().url(url).build();
  74.         //得到Call对象
  75.         Call call = okHttpClient.newCall(request);
  76.         //执行异步请求
  77.         call.enqueue(callback);
  80.     }
  82.     /** * post请求 * 参数1 url * 参数2 回调Callback */
  84.     public static void doPost(String url, Map<String, String> params, Callback callback) {
  86.         //创建OkHttpClient请求对象
  87.         OkHttpClient okHttpClient = getOkHttpClient();
  88.         //3.x版本post请求换成FormBody 封装键值对参数
  90.         FormBody.Builder builder = new FormBody.Builder();
  91.         //遍历集合
  92.         for (String key : params.keySet()) {
  93.             builder.add(key, params.get(key));
  95.         }
  98.         //创建Request
  99.         Request request = new Request.Builder().url(url).post(builder.build()).build();
  101.         Call call = okHttpClient.newCall(request);
  102.         call.enqueue(callback);
  104.     }
  106.     /** * post请求上传文件 * 参数1 url * 参数2 回调Callback */
  107.     public static void uploadPic(String url, File file, String fileName) {
  108.         //创建OkHttpClient请求对象
  109.         OkHttpClient okHttpClient = getOkHttpClient();
  110.         //创建RequestBody 封装file参数
  111.         RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file);
  112.         //创建RequestBody 设置类型等
  113.         RequestBody requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM).addFormDataPart("file", fileName, fileBody).build();
  114.         //创建Request
  115.         Request request = new Request.Builder().url(url).post(requestBody).build();
  117.         //得到Call
  118.         Call call = okHttpClient.newCall(request);
  119.         //执行请求
  120.         call.enqueue(new Callback() {
  121.             @Override
  122.             public void onFailure(Call call, IOException e) {
  124.             }
  126.             @Override
  127.             public void onResponse(Call call, Response response) throws IOException {
  128.                 //上传成功回调 目前不需要处理
  129.             }
  130.         });
  132.     }
  134.     /** * Post请求发送JSON数据 * 参数一：请求Url * 参数二：请求的JSON * 参数三：请求回调 */
  135.     public static void doPostJson(String url, String jsonParams, Callback callback) {
  136.         RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonParams);
  137.         Request request = new Request.Builder().url(url).post(requestBody).build();
  138.         Call call = getOkHttpClient().newCall(request);
  139.         call.enqueue(callback);
  142.     }
  144.     /** * 下载文件 以流的形式把apk写入的指定文件 得到file后进行安装 * 参数一：请求Url * 参数二：保存文件的路径名 * 参数三：保存文件的文件名 */
  145.     public static void download(final Context context, final String url, final String saveDir) {
  146.         Request request = new Request.Builder().url(url).build();
  147.         Call call = getOkHttpClient().newCall(request);
  148.         call.enqueue(new Callback() {
  149.             @Override
  150.             public void onFailure(Call call, IOException e) {
  151.                 Log.i("xxx", e.toString());
  152.             }
  154.             @Override
  155.             public void onResponse(Call call, final Response response) throws IOException {
  157.                 InputStream is = null;
  158.                 byte[] buf = new byte[2048];
  159.                 int len = 0;
  160.                 FileOutputStream fos = null;
  161.                 try {
  162.                     is = response.body().byteStream();
  163.                     //apk保存路径
  164.                     final String fileDir = isExistDir(saveDir);
  165.                     //文件
  166.                     File file = new File(fileDir, getNameFromUrl(url));
  167.                     fos = new FileOutputStream(file);
  168.                     while ((len = is.read(buf)) != -1) {
  169.                         fos.write(buf, 0, len);
  170.                     }
  171.                     fos.flush();
  172.                     //apk下载完成后 调用系统的安装方法
  173.                     Intent intent = new Intent(Intent.ACTION_VIEW);
  174.                     intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
  175.                     context.startActivity(intent);
  176.                 } catch (IOException e) {
  177.                     e.printStackTrace();
  178.                 } finally {
  179.                     if (is != null) is.close();
  180.                     if (fos != null) fos.close();
  183.                 }
  184.             }
  185.         });
  187.     }
  189.     /** * @param saveDir * @return * @throws IOException 判断下载目录是否存在 */
  190.     public static String isExistDir(String saveDir) throws IOException {
  191.         // 下载位置
  192.         if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
  194.             File downloadFile = new File(Environment.getExternalStorageDirectory(), saveDir);
  195.             if (!downloadFile.mkdirs()) {
  196.                 downloadFile.createNewFile();
  197.             }
  198.             String savePath = downloadFile.getAbsolutePath();
  199.             Log.e("savePath", savePath);
  200.             return savePath;
  201.         }
  202.         return null;
  203.     }
  205.     /** * @param url * @return 从下载连接中解析出文件名 */
  206.     private static String getNameFromUrl(String url) {
  207.         return url.substring(url.lastIndexOf("/") + 1);
  208.     }
  210.     /** * 为okhttp添加缓存，这里是考虑到服务器不支持缓存时，从而让okhttp支持缓存 */
  211.     private static class CacheInterceptor implements Interceptor { 
  212.         @Override
  213.         public Response intercept(Chain chain) throws IOException {
  214.             // 有网络时 设置缓存超时时间1个小时
  215.             int maxAge = 60 * 60;
  216.             // 无网络时，设置超时为1天
  217.             int maxStale = 60 * 60 * 24;
  218.             Request request = chain.request();
  219.             if (NetWorkUtils.isNetWorkAvailable(MyApp.getInstance())) {
  220.                 //有网络时只从网络获取
  221.                 request = request.newBuilder().cacheControl(CacheControl.FORCE_NETWORK).build();
  222.             } else {
  223.                 //无网络时只从缓存中读取
  224.                 request = request.newBuilder().cacheControl(CacheControl.FORCE_CACHE).build();
  225.                /* Looper.prepare(); Toast.makeText(MyApp.getInstance(), "走拦截器缓存", Toast.LENGTH_SHORT).show(); Looper.loop();*/
  226.             }
  227.             Response response = chain.proceed(request);
  228.             if (NetWorkUtils.isNetWorkAvailable(MyApp.getInstance())) {
  229.                 response = response.newBuilder()
  230.                         .removeHeader("Pragma")
  231.                         .header("Cache-Control", "public, max-age=" + maxAge)
  232.                         .build();
  233.             } else {
  234.                 response = response.newBuilder()
  235.                         .removeHeader("Pragma")
  236.                         .header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
  237.                         .build();
  238.             }
  239.             return response;
  240.         }
  241.     }
  243.     public interface OnGetServerDateLisnter { 
  244.         void getData(String string);
  245.     }
  246. }

第二类是NetWorkUtils

  1. public class NetWorkUtils { //判断网络是否连接 public static boolean isNetWorkAvailable(Context context) { //网络连接管理器 ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); //网络信息 NetworkInfo info = connectivityManager.getActiveNetworkInfo(); if (info != null) { return true; } return false; } }

第三个MyAPP类

  1. public class MyApp extends Application { private static MyApp mInstance; @Override public void onCreate() { super.onCreate(); mInstance=this; ImageLoaderConfiguration defaultcof = ImageLoaderConfiguration.createDefault(getApplicationContext()); ImageLoader.getInstance().init(defaultcof); } public static MyApp getInstance(){ return mInstance; }; }

第四个GsonObjectCallback类

  1. public abstract class GsonObjectCallback<T> implements Callback {
  3.     private Handler handler = OkHttp3Utils.getInstance().getHandler();
  5.     //主线程处理
  6.     public abstract void onUi(T t);
  8.     //主线程处理
  9.     public abstract void onFailed(Call call, IOException e);
  11.     //请求失败
  12.     @Override
  13.     public void onFailure(final Call call, final IOException e) {
  14.         handler.post(new Runnable() {
  15.             @Override
  16.             public void run() {
  17.                 onFailed(call, e);
  18.             }
  19.         });
  20.     }
  22.     //请求json 并直接返回泛型的对象 主线程处理
  23.     @Override
  24.     public void onResponse(Call call, Response response) throws IOException {
  25.         String json = response.body().string();
  26.         Class<T> cls = null;
  28.         Class clz = this.getClass();
  29.         ParameterizedType type = (ParameterizedType) clz.getGenericSuperclass();
  30.         Type[] types = type.getActualTypeArguments();
  31.         cls = (Class<T>) types[0];
  32.         Gson gson = new Gson();
  33.         final T t = gson.fromJson(json, cls);
  34.         handler.post(new Runnable() {
  35.             @Override
  36.             public void run() {
  37.             onUi(t);
  38.             }
  39.         });
  40.     }
  41. }

创建adapter包，里面有两个适配器

第一个适配器是XRecAdapterBJB

  1. public class XRecAdapterBJB extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private List<BJBean.DataBean> bjbList; private MainActivity mainActivity; public XRecAdapterBJB(List<BJBean.DataBean> bjbList, MainActivity mainActivity) { this.mainActivity = mainActivity; this.bjbList = bjbList; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = View.inflate(mainActivity, R.layout.xrecview, null); XRecViewHolder xRecViewHolder = new XRecViewHolder(view); return xRecViewHolder; } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { XRecViewHolder xRecViewHolder = (XRecViewHolder) holder; xRecViewHolder.titel.setText(bjbList.get(position).getTitle()); xRecViewHolder.yj.setText(bjbList.get(position).getBargainPrice() + ""); xRecViewHolder.xj.setText(bjbList.get(position).getPrice() + ""); String[] picUrl = bjbList.get(position).getImages().split("\\|"); Glide.with(mainActivity).load(picUrl[0]).into(xRecViewHolder.iv); } @Override public int getItemCount() { return bjbList != null ? bjbList.size() : 0; } class XRecViewHolder extends RecyclerView.ViewHolder { private final ImageView iv; private final TextView titel; private final TextView yj; private final TextView xj; public XRecViewHolder(View itemView) { super(itemView); iv = itemView.findViewById(R.id.xRecView_itemsj_iv); titel = itemView.findViewById(R.id.xRecView_itemsj_titel); yj = itemView.findViewById(R.id.xRecView_itemsj_yuanJia); xj = itemView.findViewById(R.id.xRecView_itemsj_xianJia); } } }

第二个XRecAdapterSJ类

  1. public class XRecAdapterSJ extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 
  3.     private List<SJBean.DataBean> sjList;
  4.     private MainActivity mainActivity;
  6.     public XRecAdapterSJ(List<SJBean.DataBean> sjList, MainActivity mainActivity) {
  7.         this.mainActivity = mainActivity;
  8.         this.sjList = sjList;
  9.     }
  11.     @Override
  12.     public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  13.         View view = View.inflate(mainActivity,R.layout.xrecview,null);
  14.         XRecViewHolder xRecViewHolder = new XRecViewHolder(view);
  15.         return xRecViewHolder;
  16.     }
  18.     @Override
  19.     public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
  20.         XRecViewHolder xRecViewHolder = (XRecViewHolder) holder;
  21.         xRecViewHolder.titel.setText(sjList.get(position).getTitle());
  22.         xRecViewHolder.yj.setText(sjList.get(position).getBargainPrice()+"");
  23.         xRecViewHolder.xj.setText(sjList.get(position).getPrice()+"");
  24.         String[] picUrl = sjList.get(position).getImages().split("\\|");
  25.         Glide.with(mainActivity).load(picUrl[0]).into(xRecViewHolder.iv);
  26.     }
  28.     @Override
  29.     public int getItemCount() {
  30.         return sjList != null ? sjList.size() : 0;
  31.     }
  33.     class XRecViewHolder extends RecyclerView.ViewHolder { 
  35.         private final ImageView iv;
  36.         private final TextView titel;
  37.         private final TextView yj;
  38.         private final TextView xj;
  40.         public XRecViewHolder(View itemView) {
  41.             super(itemView);
  42.             iv = itemView.findViewById(R.id.xRecView_itemsj_iv);
  43.             titel = itemView.findViewById(R.id.xRecView_itemsj_titel);
  44.             yj = itemView.findViewById(R.id.xRecView_itemsj_yuanJia);
  45.             xj = itemView.findViewById(R.id.xRecView_itemsj_xianJia);
  46.         }
  47.     }
  50. }

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