Android 如何用HttpClient 以Get方式获取数据并添加http头信息

public void HttpGetData() {  
    try {  
        HttpClient httpclient = new DefaultHttpClient();  
        String uri = "http://www.yourweb.com";   
        HttpGet get = new HttpGet(uri);  
        //添加http头信息     
        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();  
        //检验状态码，如果成功接收数据    
        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) {       
    }  
}