package org.tonny.httpUtil;import java.util.List;import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
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.util.EntityUtils;public class HttpService {private HttpClient _httpClient = null;private HttpGet _httpGet = null;private HttpPost _httpPost = null;private HttpResponse _httpResponse = null;private HttpEntity _responseEntity = null;private HttpEntity _requestEntity = null;public HttpService() {_httpClient = new DefaultHttpClient();}public String get(String url) throws Exception {// http请求对象_httpGet = new HttpGet(url);// 执行GET请求_httpResponse = _httpClient.execute(_httpGet);// 200表示请求成功if (_httpResponse.getStatusLine().getStatusCode() == 200) {_responseEntity = _httpResponse.getEntity();return EntityUtils.toString(_responseEntity);} else {return null;}}/*** * @param url*            请求的URL地址* @param params*            POST的参数，使用键值对的方式传入* @return* @throws Exception*/public String post(String url, List<NameValuePair> params) throws Exception {_httpPost = new HttpPost(url);//注意这里需要请求实体_requestEntity = new UrlEncodedFormEntity(params);_httpPost.setEntity(_requestEntity);_httpResponse = _httpClient.execute(_httpPost);if (_httpResponse.getStatusLine().getStatusCode() == 200) {//数据返回还是使用实体_responseEntity = _httpResponse.getEntity();return EntityUtils.toString(_responseEntity);} else {return null;}}
}

package org.tonnny.httptest;import java.util.ArrayList;
import java.util.List;import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.tonny.httpUtil.HttpService;import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.app.Activity;public class MainActivity extends Activity {private EditText _txtUrl = null;private TextView _lblInfo = null;private Handler _handler = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);this._txtUrl = (EditText) this.findViewById(R.id.txtUrl);this._lblInfo = (TextView) this.findViewById(R.id.lblInfo);// 这里使用handler实现work线程和UI线程的通信，主要是work线程向UI发送消息，所以在这里定了了消息的处理方法this._handler = new Handler() {@Overridepublic void handleMessage(Message msg) {String content = String.valueOf(msg.obj);Log.d("Main in UI ", content);_lblInfo.setText(content);}};}/*** 这里没有采用定义类的方式，而是直接在activity_main中定义onclick属性来实现* @param v*/public void OnBtnGetClick(View v) {// String url = this._txtUrl.getText().toString().trim();String url = "http://www.baidu.com";GetThread work = new GetThread(url);work.start();}/*** 这里POST的参数需要设置好* @param v*/public void OnBtnPostClick(View v) {// String url = this._txtUrl.getText().toString().trim();String url = "http://mail.163.com/";List<NameValuePair> params = new ArrayList<NameValuePair>();params.add(new BasicNameValuePair("savelogin", "0"));params.add(new BasicNameValuePair("url2","http://mail.163.com/errorpage/error163.htm"));params.add(new BasicNameValuePair("username", "***"));params.add(new BasicNameValuePair("passowrd", "***"));PostThread work = new PostThread(url, params);work.start();}/*** Get work线程类* @author Tinny Cheung**/private final class GetThread extends Thread {private String _url;public GetThread(String url) {_url = url;}@Overridepublic void run() {HttpService getMethod = new HttpService();try {String res = getMethod.get(_url);Message msg = _handler.obtainMessage();msg.obj = res;_handler.sendMessage(msg);} catch (Exception e) {e.printStackTrace();}}}/*** Post work线程类* @author Tinny Cheung**/private final class PostThread extends Thread {private String _url;private List<NameValuePair> _params;public PostThread(String url, List<NameValuePair> params) {_url = url;_params = params;}@Overridepublic void run() {HttpService postMethod = new HttpService();try {String res = postMethod.post(_url, _params);Message msg = _handler.obtainMessage();msg.obj = res;_handler.sendMessage(msg);} catch (Exception e) {e.printStackTrace();}}}
}

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