使用 Android 的 Spotify SDK 播放播放列表和曲目

Question

我在使用 Beta Spotify SDK 播放 Spotify 播放列表时遇到了一些问题。我有点关注 this tutorial on playback with the Spotify Player class. Unlike in the example, though, I want to play tracks and playlists provided by the user, so I must collect user tracks and playlist data, which I have done with Kaaes Android Web Wrapper。收集了我需要的数据后，我尝试构建 Spotify 播放器（似乎构建良好），然后通过单独的方法尝试播放曲目或播放列表。有趣的是，只有在构建过程中调用它（就像在教程中一样），但不是从其他方法调用时，我才能获得要播放的曲目，而且我根本无法播放播放列表。我在尝试播放播放列表时收到一条错误消息：

com.spotify.sdk.android.player.NativeSpotifyException: Failed SpPlayUri with error code 5 (An unexpected argument value was passed to a function)

我传递给 play 方法的播放列表语法如下所示：

spotify:playlist:4vDeSXEwfHMYOuQaTtwlUK

这与曲目相似：

spotify:track:2TpxZ7JUBn3uw46aR7qd6V

当然，这可能是不正确的，但很难在网上找到有关如何在 Android SDK 上播放播放列表的示例。那么谁能告诉我如何播放播放列表以及如何在 Spotify Player 对象上播放内容，尤其是远离 Player 构建器？我将在下面提供我工作的一些相关部分。 FWIW，我正在处理来自另一个 activity 的身份验证，它还没有给我带来太多问题......

private PlayerState                         state;
private Player                              player;
...
public void buildPlayer(){
    //start a Spotify player
    Config playerConfig = new Config(this, token, client_id);
    Spotify.getPlayer(playerConfig, this, new Player.InitializationObserver() {
        @Override
        public void onInitialized(Player p) {
            player = p;
            player.addPlayerNotificationCallback(SpotifyPlayer.this);
            player.setPlaybackBitrate(PlaybackBitrate.BITRATE_NORMAL);
            player.getPlayerState(new PlayerStateCallback() {
                @Override
                public void onPlayerState(PlayerState playerState) {
                    state = playerState;
                }
            });
        }
        @Override
        public void onError(Throwable throwable) {
            Log.e(ID, "Could not initialize player: " + throwable.getMessage());
        }
    });
}

...
public void test(){
    try {
        player.play("spotify:track:2TpxZ7JUBn3uw46aR7qd6V");
        //oddly enough, the track fails to play here, but not if I have this line in the builder
    }catch (Exception e){
        System.out.println("player failed to play");
        e.printStackTrace();
    }
}

class 中还有更多内容，但 none 现在应该会受到影响。我期待听到您的建议。

Answer 1

您收到该错误是因为您使用的 Spotify 播放列表的 URI 不正确。正确的格式是：

spotify:user:{user_id}:playlist:{playlist_id}

例如：

spotify:user:spotify:playlist:4hOKQuZbraPDIfaGbM3lKI

另一个问题是由于您仅在触发回调 onInitialized 时才分配字段 player，可能是在您调用 test 字段 [=13= 时] 仍然是空的，你得到一个 NullPointerException。

像这样改变你的方法buildPlayer：

public void buildPlayer(){
    //start a Spotify player
    Config playerConfig = new Config(this, token, client_id);
    player = Spotify.getPlayer(playerConfig, this, new Player.InitializationObserver() {
        @Override
        public void onInitialized(Player p) {
            player.addPlayerNotificationCallback(SpotifyPlayer.this);
            player.setPlaybackBitrate(PlaybackBitrate.BITRATE_NORMAL);
            player.getPlayerState(new PlayerStateCallback() {
                @Override
                public void onPlayerState(PlayerState playerState) {
                    state = playerState;
                }
            });
        }
        @Override
        public void onError(Throwable throwable) {
            Log.e(ID, "Could not initialize player: " + throwable.getMessage());
        }
    });
}

使用 Android 的 Spotify SDK 播放播放列表和曲目

Playing playlists and tracks with Spotify SDK for Android

sdk

android

wrapper

spotify