thelinmichael/spotify-web-api-java：如何从异步/同步方法中获取价值

Question

例如，我想获取 Spotify 曲目的 uri 并将其作为 String 值放入另一个方法中，但是我不知道该怎么做。我尝试使用 SharedPreferences 来获取值，但 getString 方法不起作用。我只是想知道是否有一种更简单的方法可以从 Async/Sync 方法的另一种方法中获取 track.getUri （或任何）。任何帮助将不胜感激。

到目前为止的代码：

private static final String accessToken = "...";
    private static final String id = "01iyCAUm8EvOFqVWYJ3dVX";
    public static SharedPreferences.Editor editor;






    private static final SpotifyApi spotifyApi = new SpotifyApi.Builder()
            .setAccessToken(accessToken)
            .build();
    private static final GetTrackRequest getTrackRequest = spotifyApi.getTrack(id)
//          .market(CountryCode.SE)
            .build();

    public static void getTrack_Sync() {
        try {
            final Track track = getTrackRequest.execute();

            System.out.println("Name: " + track.getName());
        } catch (IOException | SpotifyWebApiException | ParseException e) {
            System.out.println("Error: " + e.getMessage());
        }
    }



    @RequiresApi(api = Build.VERSION_CODES.N)
    public void getTrack_Async() {
        try {
            final CompletableFuture<Track> trackFuture = getTrackRequest.executeAsync();

            // Thread free to do other tasks...


            // Example Only. Never block in production code.
            final Track track = trackFuture.join();

            String uri = track.getUri();
            editor = getSharedPreferences("uri", 0).edit();
            editor.putString("uri", uri);
            editor.commit();
            editor.apply();




            System.out.println("Name: " + track.getUri());

        } catch (CompletionException e) {
            System.out.println("Error: " + e.getCause().getMessage());
        } catch (CancellationException e) {
            System.out.println("Async operation cancelled.");
        }
    }

    public void go() {
        getTrack_Async();
      //  String value = editor.getString("uri", )
    }

Answer 1

要获取曲目，您需要一些信息才能开始。例如我有 spotify trackId 并且可以像这样（同步）找到轨道：

public Track getTrack(String trackId) {
  return spotifyApi.getTrack(trackId).build().execute();
}

现在 Track 对象（特别是 com.wrapper.spotify.model_objects.specification.Track）提供了大量信息。例如字段uri。

所以你可以这样做：

public void run(String trackId) {
  Track track = spotifyApi.getTrack(trackId).build().execute();
  String uri = track.uri;
  // now call something else with the uri?
}

这有帮助吗？你的问题对我来说并不完全清楚。