小记：获取post和get请求。

  1 package com.lixu.httpget_post;
  2 import java.io.ByteArrayOutputStream;
  3 import java.io.IOException;
  4 import java.io.InputStream;
  5 import java.io.UnsupportedEncodingException;
  6 import java.util.ArrayList;
  7 import java.util.List;
  8 import org.apache.http.HttpResponse;
  9 import org.apache.http.NameValuePair;
 10 import org.apache.http.client.ClientProtocolException;
 11 import org.apache.http.client.HttpClient;
 12 import org.apache.http.client.entity.UrlEncodedFormEntity;
 13 import org.apache.http.client.methods.HttpGet;
 14 import org.apache.http.client.methods.HttpPost;
 15 import org.apache.http.impl.client.DefaultHttpClient;
 16 import org.apache.http.message.BasicNameValuePair;
 17 import android.app.Activity;
 18 import android.os.Bundle;
 19 import android.view.View;
 20 import android.view.View.OnClickListener;
 21 import android.widget.Button;
 22 import android.widget.EditText;
 23 import android.widget.Toast;
 24
 25 public class MainActivity extends Activity implements OnClickListener {
 26
 27     EditText et1;
 28     EditText et2;
 29
 30     protected void onCreate(Bundle savedInstanceState) {
 31         super.onCreate(savedInstanceState);
 32         setContentView(R.layout.activity_main);
 33         et1 = (EditText) findViewById(R.id.et1);
 34         et2 = (EditText) findViewById(R.id.et2);
 35         Button bt1 = (Button) findViewById(R.id.btn1);
 36         Button bt2 = (Button) findViewById(R.id.btn2);
 37         bt1.setOnClickListener(this);
 38         bt2.setOnClickListener(this);
 39
 40     }
 41
 42     @Override
 43     public void onClick(View v) {
 44         switch (v.getId()) {
 45         case R.id.btn1:
 46             new Thread(new Runnable() {
 47
 48                 @Override
 49                 public void run() {
 50                     // 1.定义一个客户端 你可以理解为是一个浏览器
 51                     HttpClient client = new DefaultHttpClient();
 52                     // 2. 定义一个get请求，并封装好他的参数
 53                     String data = "username" + et1.getText().toString() + "password" + et2.getText().toString();
 54                     HttpGet get = new HttpGet("http://10.0.2.2:8080/test/lianjie?" + data);
 55                     // 3. 用定义好的浏览器来执行一个地址
 56                     try {
 57                         HttpResponse response = client.execute(get);
 58                         // 4. 获取状态码，看返回回来的是否是200
 59                         final int statuscode = response.getStatusLine().getStatusCode();
 60                         if (statuscode == 200) {
 61                             InputStream in = response.getEntity().getContent();
 62                             final String content = getStringFromStream(in);
 63                             runOnUiThread(new Runnable() {
 64
 65                                 public void run() {
 66                                     Toast.makeText(MainActivity.this, "状态为：" + statuscode + "内容是：" + content, 0).show();
 67                                 }
 68                             });
 69                         }
 70
 71                     } catch (ClientProtocolException e) {
 72                         // TODO Auto-generated catch block
 73                         e.printStackTrace();
 74                     } catch (IOException e) {
 75                         // TODO Auto-generated catch block
 76                         e.printStackTrace();
 77                     }
 78
 79                 }
 80             }).start();
 81             break;
 82         case R.id.btn2:
 83             new Thread(new Runnable() {
 84                 public void run() {
 85                     HttpClient client = new DefaultHttpClient();
 86                     // 定义一个post请求的对象
 87                     HttpPost post = new HttpPost("http://10.0.2.2:8080/test/lianjie");
 88                     List<NameValuePair> parameters = new ArrayList<NameValuePair>();
 89                     NameValuePair name = new BasicNameValuePair("username", et1.getText().toString());
 90                     NameValuePair pwd = new BasicNameValuePair("pasword", et2.getText().toString());
 91                     parameters.add(name);
 92                     parameters.add(pwd);
 93
 94                     UrlEncodedFormEntity entity;
 95                     try {
 96                         entity = new UrlEncodedFormEntity(parameters, "UTF-8");
 97                         post.setEntity(entity);
 98                         HttpResponse response = client.execute(post);
 99                         final int statuscode = response.getStatusLine().getStatusCode();// 获取状态码
100                         if (statuscode == 200) {
101                             InputStream in = response.getEntity().getContent();
102                             final String content=getStringFromStream(in);
103                             runOnUiThread(new Runnable() {
104
105                                 public void run() {
106                                     Toast.makeText(MainActivity.this, "状态为："+statuscode+"内容是："+content, 0).show();
107                                 }
108                             });
109                         }
110
111                     } catch (UnsupportedEncodingException e) {
112                         // TODO Auto-generated catch block
113                         e.printStackTrace();
114                     } catch (ClientProtocolException e) {
115                         // TODO Auto-generated catch block
116                         e.printStackTrace();
117                     } catch (IOException e) {
118                         // TODO Auto-generated catch block
119                         e.printStackTrace();
120                     }
121                 }
122
123             }).start();
124             break;
125
126         default:
127             break;
128         }
129
130     }
131
132     public String getStringFromStream(InputStream in) {
133         byte[] buffer = new byte[1024];
134         ByteArrayOutputStream bytearray = new ByteArrayOutputStream();
135         int len = 0;
136         try {
137             if ((len = in.read(buffer, 0, 1024)) != -1) {
138                 bytearray.write(buffer);
139             }
140         } catch (IOException e) {
141             // TODO Auto-generated catch block
142             e.printStackTrace();
143         }
144         String content = bytearray.toString();
145         return content;
146     }
147
148 }