Android HttpClient GET或者POST請求基本使用方法

在Android開發中我們經常會用到網絡連接功能與服務器進行數據的交互，為此Android的SDK提供了Apache的HttpClient來方便我們使用各種Http服務。你可以把HttpClient想象成一個浏覽器，通過它的API我們可以很方便的發出GET，POST請求（當然它的功能遠不止這些）

這裡只介紹如何使用HttpClient發起GET或者POST請求
GET 方式
代碼如下：

//先將參數放入List，再對參數進行URL編碼
List<BasicNameValuePair> params = new LinkedList<BasicNameValuePair>();
params.add(new BasicNameValuePair("param1", "中國"));
params.add(new BasicNameValuePair("param2", "value2"));
//對參數編碼
String param = URLEncodedUtils.format(params, "UTF-8");
//baseUrl
String baseUrl = "http://ubs.free4lab.com/php/method.php";
//將URL與參數拼接
HttpGet getMethod = new HttpGet(baseUrl + "?" + param);

HttpClient httpClient = new DefaultHttpClient();
try {
HttpResponse response = httpClient.execute(getMethod); //發起GET請求
Log.i(TAG, "resCode = " + response.getStatusLine().getStatusCode()); //獲取響應碼
Log.i(TAG, "result = " + EntityUtils.toString(response.getEntity(), "utf-8"));//獲取服務器響應內容
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

POST方式
代碼如下：

//和GET方式一樣，先將參數放入List
params = new LinkedList<BasicNameValuePair>();
params.add(new BasicNameValuePair("param1", "Post方法"));
params.add(new BasicNameValuePair("param2", "第二個參數"));

try {
HttpPost postMethod = new HttpPost(baseUrl);
postMethod.setEntity(new UrlEncodedFormEntity(params, "utf-8")); //將參數填入POST Entity中

HttpResponse response = httpClient.execute(postMethod); //執行POST方法
Log.i(TAG, "resCode = " + response.getStatusLine().getStatusCode()); //獲取響應碼
Log.i(TAG, "result = " + EntityUtils.toString(response.getEntity(), "utf-8")); //獲取響應內容

} 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();
}