Android http get/post传递参数

本程序介绍如何通过HttpClient模块来创建Http连接，并分别以Http Get和Post方法传递参数，连接之后取回web server的返回网页结果。

     注意，在用Post时，传递变量必须用NameValuePais[]数组存储，通过HttpRequest.setEntity()方法来发出http请求。

     此外，也必须通过DefaultHttpClient().execute(httpRequest)添加HttpRequest对象来接收web server的回复，在通过httpResponse.getEntity()取出回复信息。

 /*必需引用apache.http相关类别来建立HTTP联机*/
 import org.apache.http.HttpResponse;
 import org.apache.http.NameValuePair;
 import org.apache.http.client.ClientProtocolException;
 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 org.apache.http.protocol.HTTP;
 import org.apache.http.util.EntityUtils;
 /*必需引用java.io 与java.util相关类来读写文件*/
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;

 public class EX08_01 extends Activity
 {
   /*声明两个Button对象,与一个TextView对象*/
   private Button mButton1,mButton2;
   private TextView mTextView1;

   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState)
   {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);

     /*透过findViewById建构子建立TextView与Button对象*/
     mButton1 =(Button) findViewById(R.id.myButton1);
     mButton2 =(Button) findViewById(R.id.myButton2);
     mTextView1 = (TextView) findViewById(R.id.myTextView1);

     /*设定OnClickListener来聆听OnClick事件*/
     mButton1.setOnClickListener(new Button.OnClickListener()
     {
       /*重写onClick事件*/
       @Override
       public void onClick(View v)
       {
         /*声明网址字符串*/
         String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Post/index.php";
         /*建立HTTP Post联机*/
         HttpPost httpRequest = new HttpPost(uriAPI);
         /*
          * Post运作传送变量必须用NameValuePair[]数组储存
         */
         List <NameValuePair> params = new ArrayList <NameValuePair>();
         params.add(new BasicNameValuePair("str", "I am Post String"));
         try
         {
           /*发出HTTP request*/
           httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
           /*取得HTTP response*/
           HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
           /*若状态码为200 ok*/
           if(httpResponse.getStatusLine().getStatusCode() == 200)
           {
             /*取出响应字符串*/
             String strResult = EntityUtils.toString(httpResponse.getEntity());
             mTextView1.setText(strResult);
           }
           else
           {
             mTextView1.setText("Error Response: "+httpResponse.getStatusLine().toString());
           }
         }
         catch (ClientProtocolException e)
         {
           mTextView1.setText(e.getMessage().toString());
           e.printStackTrace();
         }
         catch (IOException e)
         {
           mTextView1.setText(e.getMessage().toString());
           e.printStackTrace();
         }
         catch (Exception e)
         {
           mTextView1.setText(e.getMessage().toString());
           e.printStackTrace();
         }

       }
     });
     mButton2.setOnClickListener(new Button.OnClickListener()
     {
       @Override
       public void onClick(View v)
       {
         // TODO Auto-generated method stub
         /*声明网址字符串*/
         String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Get/index.php?str=I+am+Get+String";
         /*建立HTTP Get联机*/
         HttpGet httpRequest = new HttpGet(uriAPI);
         try
         {
           /*发出HTTP request*/
           HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
           /*若状态码为200 ok*/
           if(httpResponse.getStatusLine().getStatusCode() == 200)
           {
             /*取出响应字符串*/
             String strResult = EntityUtils.toString(httpResponse.getEntity());
             /*删除多余字符*/
             strResult = eregi_replace("(/r/n|/r|/n|/n/r)","",strResult);
             mTextView1.setText(strResult);
           }
           else
           {
             mTextView1.setText("Error Response: "+httpResponse.getStatusLine().toString());
           }
         }
         catch (ClientProtocolException e)
         {
           mTextView1.setText(e.getMessage().toString());
           e.printStackTrace();
         }
         catch (IOException e)
         {
           mTextView1.setText(e.getMessage().toString());
           e.printStackTrace();
         }
         catch (Exception e)
         {
           mTextView1.setText(e.getMessage().toString());
           e.printStackTrace();
         }
       }
     });
   }
     /* 自定义字符串取代函数 */
     public String eregi_replace(String strFrom, String strTo, String strTarget)
     {
       String strPattern = "(?i)"+strFrom;
       Pattern p = Pattern.compile(strPattern);
       Matcher m = p.matcher(strTarget);
       if(m.find())
       {
         return strTarget.replaceAll(strFrom, strTo);
       }
       else
       {
         return strTarget;
       }
     }
 }

  

在androidManifest.xml中必须添加权限：

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

转自：http://blog.csdn.net/flying_tao/article/details/6553601