如何从android中的TMDB获取电影的海报。我有API密钥。代码我尝试过：

Question

代码没有提供任何输出：

public static void main（String [] args）抛出异常{

    URL url = new URL("http://api.themoviedb.org/3/movie/550?api_key=fb7bb23f03b6994dafc674c074d01761");
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setDoOutput(true);
    con.setRequestMethod("GET");
    con.setRequestProperty("Content-Type", "application/json");

    BufferedReader br = new BufferedReader(new InputStreamReader((con.getInputStream())));

    String output;
    System.out.println("Output from Server .... \n");
    while ((output = br.readLine()) != null) {
        System.out.println(output);

    }

}