net

package com.example.applicationlx3.net;

/**
 * author:Created by WangZhiQiang on 2018/6/22.
 */

public interface APi {
    String DATA_URL = "http://365jia.cn/news/api3/365jia/news/headline";

}

******************************************

package com.example.applicationlx3.net;

import android.os.Handler;
import android.os.Looper;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class OkhttpUtils {
   private static OkhttpUtils instance;
    private final OkHttpClient okHttpClient;
    private Handler handler;
    private OkhttpUtils() {
        okHttpClient = new OkHttpClient.Builder()
                .connectTimeout(15, TimeUnit.SECONDS)
                .writeTimeout(15, TimeUnit.SECONDS)
                .readTimeout(15, TimeUnit.SECONDS)
                .build();
        handler = new Handler(Looper.getMainLooper());
    }
    public static OkhttpUtils getInstance(){
        if (instance == null) {
            instance = new OkhttpUtils();
        }
        return instance;
    }
    public void doGet(String url, final OnNetListener onNetListener){
        Request builder = new Request.Builder()
                .url(url)
                .build();
        okHttpClient.newCall(builder).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, final IOException e) {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        onNetListener.OnFilder(e);
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                final String string = response.body().string();
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        onNetListener.OnSuccess(string);
                    }
                });
            }
        });

    }
}

*******************************************

package com.example.applicationlx3.net;

/**
 * author:Created by WangZhiQiang on 2018/6/22.
 */

public interface OnNetListener {
    void OnSuccess(String result);
    void OnFilder(Exception e);
}