Okhttp封装，结合ImageLoader，

布局文件在这里就不声明了，根据自己的需求创建吧！！！

导入OkHttp，Gson依赖

compile 'com.zhy:okhttputils:2.0.0'

compile 'com.google.code.gson:gson:2.8.2'compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.3'

清单文件声明权限：

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

Acticity的操作

package shizhaoyu1506b20170825.okhttp;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.ImageView;import com.nostra13.universalimageloader.core.ImageLoader;import java.io.IOException;import java.util.List;public class MainActivity extends AppCompatActivity {    private ImageView image_pic;    private  String URL="http://169.254.4.76/mobile/index.php?act=goods&op=goods_list&page=100";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        initData();    }    private void initData() {        HttpUils.getHttpUtils(MainActivity.this).get(URL, ShopBean.class, new ResultData() {            @Override            public void onSuccess(BaseBean baseBean) throws IOException {                ShopBean shopBean = (ShopBean) baseBean;                List<ShopBean.DatasBean.GoodsListBean> goods_list = shopBean.getDatas().getGoods_list();                App application = (App) getApplication();                ImageLoader imageLoader = application.setImage();                imageLoader.displayImage(goods_list.get(0).getGoods_image_url(),image_pic);            }        });    }    private void initView() {         image_pic = (ImageView) findViewById(R.id.watch_pic);    }}

声明接口回调

package shizhaoyu1506b20170825.okhttp;import java.io.IOException;/** * 类用途： * 作者：史曌宇 */public interface ResultData {    public void onSuccess(BaseBean baseBean) throws IOException;}

 创建App类  完成ImageLoder的初始化

package shizhaoyu1506b20170825.okhttp;import android.app.Application;import android.content.Context;import com.nostra13.universalimageloader.core.DisplayImageOptions;import com.nostra13.universalimageloader.core.ImageLoader;import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;/** * 类用途： * 作者：史曌宇 */public class App extends Application {    private Context context;    private ImageLoader mImageLoader;    @Override    public void onCreate() {        super.onCreate();        initImageLoader();    }    private  void initImageLoader() {        DisplayImageOptions options=new DisplayImageOptions.Builder()                .cacheOnDisk(true)                .cacheInMemory(true)                .showImageOnLoading(R.mipmap.ic_launcher)                .build();        ImageLoaderConfiguration configuration=new ImageLoaderConfiguration.Builder(this)                .defaultDisplayImageOptions(options)                .build();        mImageLoader = ImageLoader.getInstance();        mImageLoader.init(configuration);    }    public   ImageLoader setImage(){        return mImageLoader;    }}

在清单文件注册

android:name=".App"

创建网络请求类，基于OkHttp框架请求数据

package shizhaoyu1506b20170825.okhttp;import android.app.AlertDialog;import android.content.Context;import android.util.Log;import com.google.gson.Gson;import com.squareup.okhttp.OkHttpClient;import com.squareup.okhttp.Request;import com.zhy.http.okhttp.OkHttpUtils;import com.zhy.http.okhttp.callback.StringCallback;import java.io.IOException;/** * 类用途：封装 HttpUils * 作者：史曌宇 */public class HttpUils {    private static volatile HttpUils httputils;    private static Context context;    private  Gson gson;    private HttpUils(Context context) {        //单例模式，封装构造方法        gson = new Gson();    }    public static HttpUils getHttpUtils(Context activity) {        //单例模式        if (httputils == null) {            synchronized (HttpUils.class) {                if (httputils == null) {                    httputils = new HttpUils(context);                }            }        }        return httputils;    }    //拼接接口请求    public void get(String url, String gtc_id, final Class zz,final ResultData resultData) throws IOException {        /**         *  Get请求         */        StringBuffer sb = new StringBuffer();        sb.append(url);//        for (Map.Entry<String, String> entry : params.entrySet()) {//            entry.getKey();//            entry.getValue();//            sb.append(entry.getKey());//            sb.append("=");//            sb.append(entry.getValue());        sb.append("&");        sb.append("gc_id=");        sb.append(gtc_id);        String s = sb.toString();        OkHttpUtils.get().url(s).build().execute(new StringCallback() {            @Override            public void onError(Request request, Exception e) {                //异常                Log.d("HttpUtils", "onError");            }            @Override            public void onResponse(String response) {                //成功                Log.d("HttpUtils", response);                BaseBean basebean = (BaseBean) gson.fromJson(response, zz);                int code = basebean.getCode();                if (code == 200) {                    if (resultData != null) {                        try {                            resultData.onSuccess(basebean);                        } catch (IOException e) {                            e.printStackTrace();                        }                    }                } else if (code == 400) {                    new AlertDialog.Builder(context).setTitle("提示")                            .setMessage("服务器错误请稍后再试").show();                }            }        });    }    //直接请求不拼接接口    public void get(String url, final Class zz, final ResultData resultData) {        OkHttpClient okHttpClient=new OkHttpClient();//        okHttpClient.setConnectTimeout(20,30);        OkHttpUtils.get().url(url).build().execute(new StringCallback() {            @Override            public void onError(Request request, Exception e) {                //异常                Log.e("onError", e.getMessage());            }            @Override            public void onResponse(String response) {                //成功                Log.e("HttpUtils", response);                BaseBean basebean = (BaseBean) gson.fromJson(response, zz);                int code = basebean.getCode();                if (code == 200) {                    if (resultData != null) {                        try {                            resultData.onSuccess(basebean);                        } catch (IOException e) {                            e.printStackTrace();                        }                    }                } else if (code == 400) {                    new AlertDialog.Builder(context).setTitle("提示")                            .setMessage("服务器错误请稍后再试").show();                }            }        });    }}

创建Bean类；

注意：总Bean类用BaseBean  其他所有的Bean类都要继承BaseBean   Bean类根据Json串去定义，举个列子，根据事例，自己创建吧！！

BaseBean

package shizhaoyu1506b20170825.okhttp;/** * 类用途： * 作者：史曌宇 */public class BaseBean {   private  int code;    public int getCode() {        return code;    }    public void setCode(int code) {        this.code = code;    }}

子类Bean

太长了，就不放上来了！！！

public class ShopBean extends  BaseBean {}