Android 입문: HTTP GET 와 POST 요청 을 HttpClient 로 모 의 합 니 다.

package org.xiazdong.servlet;

import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/Servlet1")
public class Servlet1 extends HttpServlet {

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String nameParameter = request.getParameter("name");
		String ageParameter = request.getParameter("age");
		String name = new String(nameParameter.getBytes("ISO-8859-1"),"UTF-8");
		String age = new String(ageParameter.getBytes("ISO-8859-1"),"UTF-8");
		System.out.println("GET");
		System.out.println("name="+name);
		System.out.println("age="+age);
		response.setCharacterEncoding("UTF-8");
		OutputStream out = response.getOutputStream();//    
		out.write("GET    !".getBytes("UTF-8"));
		out.close();
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		String name = request.getParameter("name");
		String age  = request.getParameter("age");
		System.out.println("POST");
		System.out.println("name="+name);
		System.out.println("age="+age);
		response.setCharacterEncoding("UTF-8");
		OutputStream out = response.getOutputStream();
		out.write("POST    !".getBytes("UTF-8"));
		out.close();
		
	}

}

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

package org.xiazdong.network.httpclient;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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 {
	private EditText name, age;
	private Button getbutton, postbutton;
	private OnClickListener listener = new OnClickListener() {
		@Override
		public void onClick(View v) {
			try{
				if(postbutton==v){
					/*
					 * NameValuePair    HEADER，List<NameValuePair>        
					 * UrlEncodedFormEntity   URLEncoder    URL  
					 * HttpPost   HTTP POST  
					 * client.execute()       ，   Response
					 */
					DefaultHttpClient client = new DefaultHttpClient();
					List<NameValuePair> list = new ArrayList<NameValuePair>();
					NameValuePair pair1 = new BasicNameValuePair("name", name.getText().toString());
					NameValuePair pair2 = new BasicNameValuePair("age", age.getText().toString());
					list.add(pair1);
					list.add(pair2);
					UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,"UTF-8");
					HttpPost post = new HttpPost("http://192.168.0.103:8080/Server/Servlet1");
					post.setEntity(entity);
					HttpResponse response = client.execute(post);
					
					if(response.getStatusLine().getStatusCode()==200){
						InputStream in = response.getEntity().getContent();//        ，  Toast   
						String str = readString(in);
						Toast.makeText(MainActivity.this, str, Toast.LENGTH_SHORT).show();
						
						
					}
					else Toast.makeText(MainActivity.this, "POST    ", Toast.LENGTH_SHORT).show();
				}
				if(getbutton==v){
					DefaultHttpClient client = new DefaultHttpClient();
					StringBuilder buf = new StringBuilder("http://192.168.0.103:8080/Server/Servlet1");
					buf.append("?");
					buf.append("name="+URLEncoder.encode(name.getText().toString(),"UTF-8")+"&");
					buf.append("age="+URLEncoder.encode(age.getText().toString(),"UTF-8"));
					HttpGet get = new HttpGet(buf.toString());
					HttpResponse response = client.execute(get);
					if(response.getStatusLine().getStatusCode()==200){
						InputStream in = response.getEntity().getContent();
						String str = readString(in);
						Toast.makeText(MainActivity.this, str, Toast.LENGTH_SHORT).show();
					}
					else Toast.makeText(MainActivity.this, "GET    ", Toast.LENGTH_SHORT).show();
				}
			}
			catch(Exception e){}
		}
	};
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
		name = (EditText) this.findViewById(R.id.name);
		age = (EditText) this.findViewById(R.id.age);
		getbutton = (Button) this.findViewById(R.id.getbutton);
		postbutton = (Button) this.findViewById(R.id.postbutton);
		getbutton.setOnClickListener(listener);
		postbutton.setOnClickListener(listener);
    }
	protected String readString(InputStream in) throws Exception {
		byte[]data = new byte[1024];
		int length = 0;
		ByteArrayOutputStream bout = new ByteArrayOutputStream();
		while((length=in.read(data))!=-1){
			bout.write(data,0,length);
		}
		return new String(bout.toByteArray(),"UTF-8");
		
	}
}