Loading json file from streamingAssets on Android using UniRx

whatever.cs

public static IObservable<RoomData> LoadLevel(string gymRoom)
{
    string path = System.IO.Path.Combine(Application.streamingAssetsPath, "Levels");
    path = System.IO.Path.Combine(path, gymRoom + ".room");
#if UNITY_ANDROID && !UNITY_EDITOR
    return ObservableWWW.Get(path)
#else
    return Observable.ReturnUnit()
        .SubscribeOn(Scheduler.ThreadPool)
        .Select(_ => System.IO.File.ReadAllText(path))
#endif
        .Select(roomJsonData =>
        {
            return JsonUtility.FromJson<RoomData>(roomJsonData);
        });
}