使用HttpClient中的HttpGet()方法进行http通信的实例：

package me.gogogoog; 

import java.io.IOException;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

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

        TextView resultText = (TextView) this.findViewById(R.id.resultText);         

        String username=\"username\"; 
        String password=\"password\"; 

        String httpUrl = \"http://192.168.1.90:8080/AndroidLogin/loginAction.do?method=login&username=\"+username+\"&password=\"+password;   
        //创建httpRequest对象
        HttpGet httpRequest = new HttpGet(httpUrl);
  try
  {
   //取得HttpClient对象
   HttpClient httpclient = new DefaultHttpClient();
   //请求HttpClient，取得HttpResponse
   HttpResponse httpResponse = httpclient.execute(httpRequest);
   //请求成功
   if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)
   {
    //取得返回的字符串
    String strResult = EntityUtils.toString(httpResponse.getEntity());
    resultText.setText(strResult);
   }
   else
   {
    resultText.setText(\"请求错误!\");
   }
  }
  catch (ClientProtocolException e)
  {
   resultText.setText(e.getMessage().toString());
  }
  catch (IOException e)
  {
   resultText.setText(e.getMessage().toString());
  }
  catch (Exception e)
  {
   resultText.setText(e.getMessage().toString());
  }   
    }
}