Android 如何用HttpClient 以Get方式獲取數據并添加http頭信息

如何以Get方式獲取Http服務器 上的數據，獲取數據時，附加http頭等驗證信息，請看下面的代碼：

public void HttpGetData() {
    try {
        HttpClient httpclient = new DefaultHttpClient();
        String uri = "http://www.yourweb.com"; 
        HttpGet get = new HttpGet(uri);
        //添加http頭信息  
        get.addHeader("Authorization", "your token ");
        get.addHeader("Content-Type", "application/json");
        get.addHeader("User-Agent","your agent");
        HttpResponse response;
        response = httpclient.execute(get);
        int code = response.getStatusLine().getStatusCode();
        //檢驗狀態碼，如果成功接收數據 
        if (code == 200) {
            //返回json格式： {"id": "27JpL~j4vsL0LX00E00005","version": "abc"}         
            String rev = EntityUtils.toString(response.getEntity());        
            obj = new JSONObject(rev);  
            String id = obj.getString("id");  
            String version = obj.getString("version");  
        }
    } catch (Exception e) {     
    }
}