android - JSON异常 : Not a primitive array?

Question

我在从 URL 接收 JSON 数组时遇到问题。我已经验证我的链接没问题，并且返回了正确的 JSON 数组，它甚至显示在错误消息中。我不确定这是什么意思。

错误:

04-17 21:34:04.435  21842-22217/edu.appdesign.leaguestats W/System.err﹕ org.json.JSONException: Not a primitive array: class org.json.JSONArray
04-17 21:34:04.435  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at org.json.JSONArray.<init>(JSONArray.java)
04-17 21:34:04.445  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at edu.appdesign.leaguestats.GetStaticData$GetSummary.doInBackground(GetStaticData.java:90)
04-17 21:34:04.445  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at edu.appdesign.leaguestats.GetStaticData$GetSummary.doInBackground(GetStaticData.java:76)
04-17 21:34:04.445  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at android.os.AsyncTask$2.call(AsyncTask.java)
04-17 21:34:04.445  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at java.util.concurrent.FutureTask.run(FutureTask.java)
04-17 21:34:04.445  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java)
04-17 21:34:04.445  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java)
04-17 21:34:04.445  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java)
04-17 21:34:04.445  21842-22217/edu.appdesign.leaguestats W/System.err﹕ at java.lang.Thread.run(Thread.java)

代码:

    JSONArray jsonArray = jsonArrayParser.getJSONFromUrl(url2);
    JSONArray leagueArray = new JSONArray(jsonArray);
    summary.rTier = leagueData.getString("tier");
    summary.rLeague = leagueData.getString("leagueName");
    summary.rRank = leagueData.getString("rank");
    summary.rLeaguePoints = leagueData.getString("leaguePoints");

JSON:

[{
   "isHotStreak": false,
   "isFreshBlood": false,
   "leagueName": "Udyr's Lancers",
   "isVeteran": false,
   "tier": "GOLD",
   "lastPlayed": -1,
   "playerOrTeamId": "23591778",
   "leaguePoints": 0,
   "rank": "V",
   "isInactive": false,
   "queueType": "RANKED_SOLO_5x5",
   "playerOrTeamName": "NV43",
   "wins": 83
}]

这一切都是在 AsyncTask 中完成的，所以没有问题。知道是什么原因造成的吗？

Answer 1

我遇到了同样的问题。这是因为这一行:

JSONArray leagueArray = new JSONArray(jsonArray);

您基本上是在创建 2 个不同的 JSONArray，第二个只是指向第一个，但您不能以这种方式实例化第二个数组，否则它会抛出错误。因此你不需要做:

new JSONArray(jsonArray)

只是做:

leagueArray = jsonArray;

附带说明一下，我认为您的意思是:

JSONArray jsonArray = jsonArrayParser.getJSONFromUrl(url2);
JSONObject leagueObject = jsonArray.getJSONObject(0);

您的第一个结果是一个数组(用“[]”表示)，但内部子项是一个对象(用“{}”表示)

希望这有帮助:)