HttpClient的GET用法以及异步（Asynctask）

import android.os.AsyncTask;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

 

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

 

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.URL;

 

public class MainActivity extends AppCompatActivity {

 

    String url="http://v.juhe.cn/toutiao/index?key=22a108244dbb8d1f49967cd74a0c144d";

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

 

        //使用异步获取网络数据

        new MyAsyncTask().execute(url);

    }

    /**

     * 异步

     */

    class MyAsyncTask extends AsyncTask<String,Integer,String>

    {

        /**

         * 请求网络数据的方法

         */

        @Override

        protected String doInBackground(String... strings) {

            //接收从网络上获取的json串

            StringBuffer result=new StringBuffer();

            HttpClient client=new DefaultHttpClient();

            //创建HttpGet  使用GET方法

            HttpGet get=new HttpGet(strings[0]);

            try {

                //发起请求 拿到HttpResponse对象  是服务器返回的数据对象

                HttpResponse httpResponse = client.execute(get);

                int responseCode = httpResponse.getStatusLine().getStatusCode();

                String responseMsg = httpResponse.getStatusLine().getReasonPhrase();

                if(200==responseCode)

                {

                    //得到返回的实体对象

                    HttpEntity entity = httpResponse.getEntity();

                    //得到实体对象的具体内容

                    InputStream inputStream = entity.getContent();

                    BufferedReader reader=new BufferedReader(new InputStreamReader(inputStream));

                    String line=null;

                    while((line=reader.readLine())!=null)

                    {

                        result.append(line);

                    }

                    System.out.println("result================="+result);

 

                }

 

            } catch (IOException e) {

                e.printStackTrace();

            }

            return result.toString();

        }

 

        /**

         * 请求完数据执行的方法

         * @param s

         */

        @Override

        protected void onPostExecute(String s) {

            super.onPostExecute(s);

            getJson(s);//解析

        }

    }

    /**

     * 解析json串

     * @param s

     */

    private void getJson(String s) {

  解析字符串可以自己写，用自己习惯的。

    }

}