我想将处理exoplayer的代码放入lifecycleOberserver类中，但是要初始化exoplayer，我需要编写这样的代码

    void prepareExoPlayer(Context context,PlayerView exoPlayerView) {
        if (context == null || exoPlayerView == null) {
            return;
        }
        if (player == null) {
            TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory();
            TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
            player = ExoPlayerFactory.newSimpleInstance(context,trackSelector);
            ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory();
            DataSource.Factory dataSourceFactory =
                    new DefaultDataSourceFactory(
                            context,Util.getUserAgent(
                                    context,context.getString(R.string.app_name)
                            )
                    );
            MediaSource videoSource = new ExtractorMediaSource
                    .Factory(dataSourceFactory)
                    .setExtractorsFactory(extractorsFactory)
                    .createMediaSource(videoUri);
            player.prepare(videoSource);
        }
        player.clearVideoSurface();
        player.setVideoSurfaceView((SurfaceView) exoPlayerView.getVideoSurfaceView());
        player.seekTo(player.getcurrentPosition() + 1);
        exoPlayerView.setPlayer(player);
    }

所以我必须在lifecycleoberserver中获取上下文并进行查看，但是我找不到解决方法，有人可以帮我吗？