小记：获取post和get请求。

 package com.lixu.httpget_post;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
 import java.util.ArrayList;
 import java.util.List;
 import org.apache.http.HttpResponse;
 import org.apache.http.NameValuePair;
 import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.entity.UrlEncodedFormEntity;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.message.BasicNameValuePair;
 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.Toast;

 public class MainActivity extends Activity implements OnClickListener {

     EditText et1;
     EditText et2;

     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         et1 = (EditText) findViewById(R.id.et1);
         et2 = (EditText) findViewById(R.id.et2);
         Button bt1 = (Button) findViewById(R.id.btn1);
         Button bt2 = (Button) findViewById(R.id.btn2);
         bt1.setOnClickListener(this);
         bt2.setOnClickListener(this);

     }

     @Override
     public void onClick(View v) {
         switch (v.getId()) {
         case R.id.btn1:
             new Thread(new Runnable() {

                 @Override
                 public void run() {
                     // 1.定义一个客户端 你可以理解为是一个浏览器
                     HttpClient client = new DefaultHttpClient();
                     // 2. 定义一个get请求，并封装好他的参数
                     String data = "username" + et1.getText().toString() + "password" + et2.getText().toString();
                     HttpGet get = new HttpGet("http://10.0.2.2:8080/test/lianjie?" + data);
                     // 3. 用定义好的浏览器来执行一个地址
                     try {
                         HttpResponse response = client.execute(get);
                         // 4. 获取状态码，看返回回来的是否是200
                         final int statuscode = response.getStatusLine().getStatusCode();
                         if (statuscode == 200) {
                             InputStream in = response.getEntity().getContent();
                             final String content = getStringFromStream(in);
                             runOnUiThread(new Runnable() {

                                 public void run() {
                                     Toast.makeText(MainActivity.this, "状态为：" + statuscode + "内容是：" + content, 0).show();
                                 }
                             });
                         }

                     } catch (ClientProtocolException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
                     } catch (IOException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
                     }

                 }
             }).start();
             break;
         case R.id.btn2:
             new Thread(new Runnable() {
                 public void run() {
                     HttpClient client = new DefaultHttpClient();
                     // 定义一个post请求的对象
                     HttpPost post = new HttpPost("http://10.0.2.2:8080/test/lianjie");
                     List<NameValuePair> parameters = new ArrayList<NameValuePair>();
                     NameValuePair name = new BasicNameValuePair("username", et1.getText().toString());
                     NameValuePair pwd = new BasicNameValuePair("pasword", et2.getText().toString());
                     parameters.add(name);
                     parameters.add(pwd);

                     UrlEncodedFormEntity entity;
                     try {
                         entity = new UrlEncodedFormEntity(parameters, "UTF-8");
                         post.setEntity(entity);
                         HttpResponse response = client.execute(post);
                         final int statuscode = response.getStatusLine().getStatusCode();// 获取状态码
                         if (statuscode == 200) {
                             InputStream in = response.getEntity().getContent();
                             final String content=getStringFromStream(in);
                             runOnUiThread(new Runnable() {

                                 public void run() {
                                     Toast.makeText(MainActivity.this, "状态为："+statuscode+"内容是："+content, 0).show();
                                 }
                             });
                         }

                     } catch (UnsupportedEncodingException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
                     } catch (ClientProtocolException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
                     } catch (IOException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
                     }
                 }

             }).start();
             break;

         default:
             break;
         }

     }

     public String getStringFromStream(InputStream in) {
         byte[] buffer = new byte[1024];
         ByteArrayOutputStream bytearray = new ByteArrayOutputStream();
         int len = 0;
         try {
             if ((len = in.read(buffer, 0, 1024)) != -1) {
                 bytearray.write(buffer);
             }
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         String content = bytearray.toString();
         return content;
     }

 }