new Thread(new Runnable() {
      @Override
      public void run() {
        String str = "http://118.31.73.173:8080/magnet/play.m3u8?code=4459d2600da1379a9b06967edf518c05f0c9b43177cf28d9a70070264c228693e3888b2ab265521e01e6034c807bebdf02da4ebbf208065fd4b2d0062a3e3d83abe2c0659500dc168a9c0ba6a9098320ee4040ce57e7c57d9e1ec3f03900f631c84df0e6f38669d73ad6102fd0169b2907c3707cc2b71f5de6d789";
        URL url = null;
        try {
          url = new URL(str);
          HttpURLConnection conn = (HttpURLConnection) url.openConnection();
          conn.getResponseCode();
          final String realUrl = conn.getURL().toString();
          conn.disconnect();
          Log.e("asd", "真实URL:" + realUrl);            
        } catch (MalformedURLException e) {
          e.printStackTrace();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }).start();

<uses-permission android:name="android.permission.INTERNET"/>