如何获得视频字幕

Question

首先，我尝试通过Android应用读取此视频中的字幕，但出现错误。

android studio上的错误

2019-08-23 14:52:03.305 10795-10825/com.yourpackgage.test E/Volley: [6358] BasicNetwork.performRequest: Unexpected response code 400 for https://www.googleapis.com/youtube/v3/captions/wlxAjQEGnXSOcbGV3uyaE2bWv_WgY3UkzKJTfgrN5pU=?key=1111111
2019-08-23 14:52:03.306 10795-10795/com.yourpackgage.test W/salah: com.android.volley.ClientError

上面的密钥是假的

视频ID = oXGL0rsaNf8

有关此视频的JSON

{
 "kind": "youtube#captionListResponse",
 "etag": "\"8jEFfXBrqiSrcF6Ee7MQuz8XuAM/LfKWiWgO1cFVBuW-bhpK8cZ3BDk\"",
 "items": [
  {
   "kind": "youtube#caption",
   "etag": "\"8jEFfXBrqiSrcF6Ee7MQuz8XuAM/dNULxz5RgRO-NrDKDba68GyyHMQ\"",
   "id": "wlxAjQEGnXSOcbGV3uyaE2bWv_WgY3UkzKJTfgrN5pU=",
   "snippet": {
    "videoId": "oXGL0rsaNf8",
    "lastUpdated": "2019-08-22T20:32:51.346Z",
    "trackKind": "ASR",
    "language": "en",
    "name": "",
    "audioTrackType": "unknown",
    "isCC": false,
    "isLarge": false,
    "isEasyReader": false,
    "isDraft": false,
    "isAutoSynced": false,
    "status": "serving"
   }
  },
  {
   "kind": "youtube#caption",
   "etag": "\"8jEFfXBrqiSrcF6Ee7MQuz8XuAM/sRhRzHkIfXoPqtkf34tollHS9hM\"",
   "id": "o7LY5HsOVTDGtCHR21dw6ebewq9yCgjw6gw0GZ6OvtEEVN2s5vQgpw==",
   "snippet": {
    "videoId": "oXGL0rsaNf8",
    "lastUpdated": "2019-08-23T01:37:49.403Z",
    "trackKind": "standard",
    "language": "en",
    "name": "CC (English)",
    "audioTrackType": "unknown",
    "isCC": false,
    "isLarge": false,
    "isEasyReader": false,
    "isDraft": false,
    "isAutoSynced": false,
    "status": "serving"
   }
  }
 ]
}

代码

RequestQueue queue = Volley.newRequestQueue(this);
        StringRequest request = new StringRequest(Request.Method.GET, "https://www.googleapis.com/youtube/v3/captions/wlxAjQEGnXSOcbGV3uyaE2bWv_WgY3UkzKJTfgrN5pU=?key=1111111", new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                Log.w("salah","done");
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.w("salah",error.toString());
            }
        });
        queue.add(request);

每次在排球库调用时遇到错误，我能知道我可以做什么来读取字幕。