在Android开发中我们经常会用到网络连接功能与服务器进行数据的交互，为此Android的SDK提供了Apache的HttpClient来方便我们使用各种Http服务。你可以把HttpClient想象成一个浏览器，通过它的API我们可以很方便的发出GET，POST请求（当然它的功能远不止这些）

这里只介绍如何使用HttpClient发起GET或者POST请求

GET 方式

复制代码 代码如下:

//先将参数放入List，再对参数进行URL编码

List<BasicNameValuePair> params = new LinkedList<BasicNameValuePair>();

params.add(new BasicNameValuePair("param1", "中国"));

params.add(new BasicNameValuePair("param2", "value2"));

//对参数编码

String param = URLEncodedUtils.format(params, "UTF-8");

//baseUrl

String baseUrl = "http://ubs.free4lab.com/php/method.php";

//将URL与参数拼接

HttpGet getMethod = new HttpGet(baseUrl + "?" + param);

HttpClient httpClient = new DefaultHttpClient();

try {

HttpResponse response = httpClient.execute(getMethod); //发起GET请求

Log.i(TAG, "resCode = " + response.getStatusLine().getStatusCode()); //获取响应码

Log.i(TAG, "result = " + EntityUtils.toString(response.getEntity(), "utf-8"));//获取服务器响应内容

} catch (ClientProtocolException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

POST方式

复制代码 代码如下:

//和GET方式一样，先将参数放入List

params = new LinkedList<BasicNameValuePair>();

params.add(new BasicNameValuePair("param1", "Post方法"));

params.add(new BasicNameValuePair("param2", "第二个参数"));

try {

HttpPost postMethod = new HttpPost(baseUrl);

postMethod.setEntity(new UrlEncodedFormEntity(params, "utf-8")); //将参数填入POST Entity中

HttpResponse response = httpClient.execute(postMethod); //执行POST方法

Log.i(TAG, "resCode = " + response.getStatusLine().getStatusCode()); //获取响应码

Log.i(TAG, "result = " + EntityUtils.toString(response.getEntity(), "utf-8")); //获取响应内容

} catch (UnsupportedEncodingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (ClientProtocolException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}