An example of http communication using the HttpGet() method in HttpClient:

/** 
 *description : Android HttpGet() 
 *authour:YanEr ・ Gates 
 *website:https://www.ofstack.com
 */
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;   
        // create httpRequest object
        HttpGet httpRequest = new HttpGet(httpUrl);
  try
  {
   // achieve HttpClient object
   HttpClient httpclient = new DefaultHttpClient();
   // request HttpClient , HttpResponse
   HttpResponse httpResponse = httpclient.execute(httpRequest);
   // The request is successful
   if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)
   {
    // Gets the returned string
    String strResult = EntityUtils.toString(httpResponse.getEntity());
    resultText.setText(strResult);
   }
   else
   {
    resultText.setText(" Request error !");
   }
  }
  catch (ClientProtocolException e)
  {
   resultText.setText(e.getMessage().toString());
  }
  catch (IOException e)
  {
   resultText.setText(e.getMessage().toString());
  }
  catch (Exception e)
  {
   resultText.setText(e.getMessage().toString());
  }   
    }
}

An example of http communication using the HttpPost() method in HttpClient:

/** 
*description : Android HttpPost() 
*authour:YanEr ・ Gates 
*website:https://www.ofstack.com
*/
package me.gogogoog; 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.List; 
import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.HttpStatus; 
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.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.message.BasicNameValuePair; 
import org.apache.http.util.EntityUtils; 
import android.app.Activity; 
import android.widget.TextView; 

public class ResultActivity 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"; 
        // create httpRequest object  
        HttpPost httpRequest = new HttpPost(httpUrl); 

        List<NameValuePair> params = new ArrayList<NameValuePair>(); 
        params.add(new BasicNameValuePair("username", username)); 
        params.add(new BasicNameValuePair("password", password)); 
        try{ 
            // Set character set  
            HttpEntity httpentity = new UrlEncodedFormEntity(params, "gb2312"); 
            // request httpRequest 
            httpRequest.setEntity(httpentity); 
            // Get the default HttpClient 
            HttpClient httpclient = new DefaultHttpClient(); 
            // achieve HttpResponse 
            HttpResponse httpResponse = httpclient.execute(httpRequest); 
            //HttpStatus.SC_OK Means the connection was successful  
            if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){ 
                // Gets the returned string  
                String strResult = EntityUtils.toString(httpResponse.getEntity()); 
                resultText.setText(strResult); 
            }else{ 
                resultText.setText(" Request error !"); 
            } 
        }catch (ClientProtocolException e){ 
            resultText.setText(e.getMessage().toString()); 
        } catch (IOException e){ 
            resultText.setText(e.getMessage().toString()); 
        }catch (Exception e){ 
            resultText.setText(e.getMessage().toString()); 
        }  
    } 
}