httpclient（Post方法）

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import com.example.httpclientrequestforpost.utils.StreamTools;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity-->";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void btnHttpClientRequest(View view){

        new Thread(){
            @Override
            public void run() {

                super.run();

//调用方法

                httpClientRequestForPost();
            }
        }.start();
    }

    /**
     * 使用HttpClient进行请求数据
     * 请求方式：POST
     */
    private void httpClientRequestForPost() {


        try {
            //1.打开浏览器

            HttpClient httpClient = new DefaultHttpClient();

            //2.填地址

            HttpPost httpPost = new HttpPost("http://apis.juhe.cn/catering/query");

            //post设置请求参数
         
            //BasicNameValuePair 键值对类型的
            List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();
     
            parameters.add(new BasicNameValuePair("lng","121.538123"));
            parameters.add(new BasicNameValuePair("lat","31.677132"));

            parameters.add(new BasicNameValuePair("key","b1cc75a5744d69064bac2549993920f6"));

            //设置请求正文

            httpPost.setEntity(new UrlEncodedFormEntity(parameters));

            //3.敲回车
            HttpResponse response = httpClient.execute(httpPost);

            //4.判断服务器是否应答了我们的请求
            //getStatusLine() 得到状态行
            //getStatusCode() 得到状态行里面的状态码

            int code = response.getStatusLine().getStatusCode();

            //HttpStatus.SC_OK== 200
            if (code == HttpStatus.SC_OK){
                //得到服务给我们响应的内容
                InputStream is = response.getEntity().getContent();

               String json = StreamTools.readFromNetWork(is);

                Log.e(TAG, "httpClientRequestForPost: "+json);

            }



        } catch (Exception e) {
            e.printStackTrace();
        }

    }

需要在bulid添加

android{
    useLibrary 'org.apache.http.legacy'
}