How to wait for media to end before proceeding with loop in JavaFX?

Question

I have an Arraylist path containing paths to different .mp3 files. My current solution plays the clips as expected however plays them simultaneously. I wish for the media to complete it's play-through before reaching the end of the loop and increasing i. I've had a Google and explored similar questions on here but none of the solutions seem to work as expected. See the current solution below:

public static void play(ArrayList path) {
        for(int i = 0; i < path.size(); i++) {
            String file = Main.gameDir + "/assets/sound/" + path.get(i) + ".mp3";
            Media sound = new Media(new File(file).toURI().toString());
            MediaPlayer mediaPlayer = new MediaPlayer(sound);
            mediaPlayer.play();
        }
}

I have tried getting the status, but this always returns UNKNOWN.

All and any help appreciated.

Check out [my answer here](https://stackoverflow.com/a/61297536/6395627). It uses `MediaView` but you should be able to easily adapt it for pure audio. Basically, the solution is to not use a loop but instead react to when one `MediaPlayer` ends and play the next one. — Slaw, Jun 17 '20 at 03:48

score 0 · Answer 1 · answered Jun 16 '20 at 21:53

As you have discovered, MediaPlayer#Play(Media) plays the sounds simultaneously. What you want to achieve is playing another sound if the current one has ended. You can do so by registering an event handler via MediaPlayer#setOnEndOfMedia(Runnable). In your event listener, you could fetch the next sound and play it, for example this way:

public static void play(List<String> paths) {
    LinkedList<Media> sounds = paths.stream().serial()
        .map(path -> Main.gameDir + "/assets/sound/" + path + ".mp3")
        .map(file -> new Media(new File(file).toURI().toString()))
        .collect(Collectors.toList(LinkedList::new));
    [ThisClass].play(sounds);
}

public static void play(LinkedList<Media> sounds) {
    if (sounds.isEmpty())
        return;
    MediaPlayer player = new MediaPlayer(sounds.poll());
    player.setOnEndOfMedia(() -> [ThisClass].play(sounds));
    player.play();
}

You need to replace [ThisClass] with your own class name. I also took the liberty of adding a generic parameter to the List you are providing and made it less specific (no need for ArrayList, List is enough), and replaced your explicit loop with streams.

How to wait for media to end before proceeding with loop in JavaFX?

1 Answers1