HttpUrlConnection

package com.example.administrator.day4httpurlconnectiondemo.utils;

import android.support.annotation.NonNull;
import android.util.Log;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * Created by Administrator on 2017/11/30.
 * 网络请求类的封装 使用：类直接调用静态方法
 */

public class HttpUtils {

    public static void SendHttpRequest(final String urlAddress, final CallBackListener listener){
        new Thread(new Runnable() {
            @Override
            public void run() {
                StringBuilder sb=null;
                HttpURLConnection connection = null;
                try {
                    URL url = new URL(urlAddress);//获得一个url对象
                    connection = (HttpURLConnection) url.openConnection();//获得HttpURLConnection对象
           /* 请求的一些设置*/
                    connection.setRequestMethod("GET");//get 必须大写
                    connection.setConnectTimeout(5000);
                    connection.setReadTimeout(5000);
                    connection.setDoInput(true);
                    connection.setDoOutput(true);
                    //在网上请求数据 得到返回数据都是以流的形式返回
                    InputStream in= connection.getInputStream();
                    BufferedReader buff= new BufferedReader(new InputStreamReader(in));
                    sb =  new StringBuilder();
                    String line = null;

                    while((line=buff.readLine())!=null){
                        sb.append(line);
                    }
                    if (listener!=null){
                        //请求成功
                        listener.onfinish(sb.toString());
                    }

                } catch (Exception e) {
                    if (listener!=null){
                        // 请求失败
                        Log.i("网址有误！！！", "run: ");
                        listener.onError(e);

                    }
                    e.printStackTrace();
                }
            }
        }).start();
    }
    public interface CallBackListener{
        void onfinish(String s);
        void onError(Exception e);
    }
}