将 Java 翻译成 C#

卡尔·奥康纳

我正在尝试为我的 xamarin 媒体应用程序提供锁屏控制。我还没有多少运气,但一直在尝试遵循https://www.youtube.com/watch?v=KNsELLrZ3V0 上的本教程我已经在我的项目中实现了大部分内容,但是有一部分我不确定在将他们的 java 转换为我的 C# 时如何去做。我将在下面发布代码,但跳到我正在谈论的视频中的部分可能更容易。

在他们开始构建 initMediaSession 方法的视频中的 6:50 处,我陷入了困境。特别是在 mSession.SetCallback 部分。我不知道 C# 将如何执行下面的重载方法,而且我无法让 mSession.SetCallback(new MediaSession.Callback(){} 不出错。

我得到的主要错误是“无法创建抽象类或接口‘MediaSession.Callback’的实例”

或者,如果您有更好的策略将媒体控件放到 android 锁屏上,请告诉我。谢谢你。

private void initMediaSession()
        {
            DabPlayer dabPlayer = new DabPlayer(true);

            mSession = new MediaSession(Application.Context, "example player sesion");
            mController = new Android.Media.Session.MediaController(Application.Context, mSession.SessionToken);

            mSession.SetCallback(new MediaSession.Callback() {
                @Override
                public void onPlay() {
                SuperSocket.onPlay();
                buildNotification(generateAction(Android.R.drawable.ic_media_pause, "Pause", ACTION_PAUSE));
                }

                @Override
                public void onPause()
                {
                SuperSocket.onPlay();
                buildNotification(generateAction(Android.R.drawable.ic_media_play, "Play", ACTION_PLAY));
                }

                @Override
                public void onSkipToNext()
                {
                SuperSocket.onPlay();
                buildNotification(generateAction(Android.R.drawable.ic_media_pause, "Pause", ACTION_PAUSE));
                }

                @Override
                public void onFastForward()
                {
                super.onFastFoward();
                }

                @Override
                public void onRewind()
                {
                super.onRewind();
                }

                @Override
                public void onRewind()
                {
                super.onStop();
                }

                @Override
                public void onStop()
                {
                super.onStop();
                NotificationManager notificationManager = (NotificationManager)getApplicaitonContext().getSystemService(Context.NotificationService);
                notificationManager.Cancel(1);
                Intent intent = new Intent(getApplicationContext(), MediaPlayerService.class);
                stopService(intent);
                }

        });
鲁巴霍夫

你不需要翻译任何东西,你只需要实现现有的MediaSession.Callback接口。

class MediaSessionCallback : MediaSession.Callback
{
    public Action OnPlayImpl { get; set; }

    public Action<long> OnSkipToQueueItemImpl { get; set; }

    public Action<long> OnSeekToImpl { get; set; }

    public Action<string, Bundle> OnPlayFromMediaIdImpl { get; set; }

    public Action OnPauseImpl { get; set; }

    public Action OnStopImpl{ get; set; }

    public Action OnSkipToNextImpl{ get; set; }

    public Action OnSkipToPreviousImpl{ get; set; }

    public Action<string, Bundle> OnCustomActionImpl { get; set; }

    public Action<string, Bundle> OnPlayFromSearchImpl { get; set; }

    public override void OnPlay ()
    {
        OnPlayImpl ();
    }

    public override void OnSkipToQueueItem (long id)
    {
        OnSkipToQueueItemImpl (id);
    }

    public override void OnSeekTo (long pos)
    {
        OnSeekToImpl (pos);
    }

    public override void OnPlayFromMediaId (string mediaId, Bundle extras)
    {
        OnPlayFromMediaIdImpl (mediaId, extras);
    }

    public override void OnPause ()
    {
        OnPauseImpl ();
    }

    public override void OnStop ()
    {
        OnStopImpl ();
    }

    public override void OnSkipToNext ()
    {
        OnSkipToNextImpl ();
    }

    public override void OnSkipToPrevious ()
    {
        OnSkipToPreviousImpl ();
    }

    public override void OnCustomAction (string action, Bundle extras)
    {
        OnCustomActionImpl (action, extras);
    }

    public override void OnPlayFromSearch (string query, Bundle extras)
    {
        OnPlayFromSearchImpl (query, extras);
    }
}

并像这样使用它:

var mediaCallback = new MediaSessionCallback ();

mediaCallback.OnPlayImpl = () => {
    LogHelper.Debug (Tag, "play");

};

mediaCallback.OnSkipToQueueItemImpl = (id) => {
    LogHelper.Debug (Tag, "OnSkipToQueueItem:" + id);

};

mediaCallback.OnSeekToImpl = (pos) => {
    LogHelper.Debug (Tag, "onSeekTo:", pos);

};

mediaCallback.OnPlayFromMediaIdImpl = (mediaId, extras) => {
    LogHelper.Debug (Tag, "playFromMediaId mediaId:", mediaId, "  extras=", extras);

};

mediaCallback.OnPauseImpl = () => {
    LogHelper.Debug (Tag, "pause. current state=" + playback.State);

};

mediaCallback.OnStopImpl = () => {
    LogHelper.Debug (Tag, "stop. current state=" + playback.State);

};

mediaCallback.OnSkipToNextImpl = () => {
    LogHelper.Debug (Tag, "skipToNext");

};

mediaCallback.OnSkipToPreviousImpl = () => {

};

mediaCallback.OnCustomActionImpl = (action, extras) => {

};

mediaCallback.OnPlayFromSearchImpl = (query, extras) => {
    LogHelper.Debug (Tag, "playFromSearch  query=", query);

};

幸运的是,甚至还有一个用于实现音乐服务的示例:

https://github.com/xamarin/monodroid-samples/blob/master/android5.0/MediaBrowserService/MediaBrowserService/MusicService.cs

本文收集自互联网,转载请注明来源。

如有侵权,请联系 [email protected] 删除。

编辑于
0

我来说两句

0 条评论
登录 后参与评论

相关文章