JavaFX重复调用stage.show()与mediaPlayer.play()失效问题求助

我需要在Windows右下角显示带动画和音效的通知，首次启动Test.main()时功能完全正常，但后续通过定时任务重复触发播放动画和音效时失效。相关代码如下，求排查解决：

Test.java #

public class Test {
    public static void main(String[] args) {
        ScheduledExecutorService executor = Executors.newScheduledThreadPool(4);
        executor.scheduleAtFixedRate(new NotificationRunnable(), 0, 2 * 60, TimeUnit.SECONDS);

        executor.scheduleAtFixedRate(new NotificationRunnable(), 0, 4 * 60, TimeUnit.SECONDS);

        executor.scheduleAtFixedRate(new NotificationRunnable(), 0, 9 * 60, TimeUnit.SECONDS);

        executor.scheduleAtFixedRate(new NotificationRunnable(), 0, 13 * 60, TimeUnit.SECONDS);
       
        //Launching application first time
        NotificationApp.runFromScheduledExecutor();
        
    }
}

NotificationRunnable.java #

public class NotificationRunnable implements Runnable{
    @Override
    public void run() {
        Platform.runLater(() -> {
            NotificationApp.playAnimation();
        });
        System.out.println("Done");
    }
}

NotificationApp.java #

public class NotificationApp extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    static Stage primaryStage = null;
    static MediaPlayer mediaPlayer = null;

    @Override
    public void start(Stage primaryStage) {
        // Create a custom dialog with an ImageView
        Image gifImage = new Image(String.valueOf(new File("img/giphy.gif"))); // Replace with your GIF file path
        ImageView gifImageView = new ImageView(gifImage);
        Pane pane = new Pane(gifImageView);
        Scene scene = new Scene(pane);

        // Set stage properties
        primaryStage.initStyle(StageStyle.TRANSPARENT); // Hide the window decoration
        primaryStage.setAlwaysOnTop(true);

        // Determine screen dimensions
        double screenWidth = Screen.getPrimary().getVisualBounds().getWidth();
        double screenHeight = Screen.getPrimary().getVisualBounds().getHeight();
        double stageWidth = gifImage.getWidth();
        double stageHeight = gifImage.getHeight();

        // Set the stage position to the right corner
        double xOffset = screenWidth - stageWidth;
        double yOffset = screenHeight - stageHeight;
        primaryStage.setX(xOffset);
        primaryStage.setY(yOffset);

        primaryStage.setScene(scene);
        this.primaryStage = primaryStage;

        Media sound = new Media(new Test().getClass().getResource("/snd/Notification.mp3").toExternalForm());
        mediaPlayer = new MediaPlayer(sound);
        //Play animation and Sound during application start
        Platform.runLater(() -> {
            playAnimation();
        });
    }

    public static void playAnimation(){
        Platform.runLater(() -> {
            mediaPlayer.play();
            primaryStage.show();
        });
        // Schedule closing the stage after 5 seconds
        ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
        scheduler.schedule(() -> {
            Platform.runLater(() -> {
                mediaPlayer.stop();
                primaryStage.close();
            });
        }, 5, TimeUnit.SECONDS);
    }
    public static void runFromScheduledExecutor() {
        Application.launch(NotificationApp.class);
    }
}

核心问题 #

1. MediaPlayer状态未重置：首次播放后，MediaPlayer的播放位置停在音频末尾，后续调用play()不会从头开始播放。
2. Stage重复关闭/显示的状态冲突：Stage关闭后再次调用show()可能引发状态异常，导致动画无法正常显示。
3. 定时线程池资源泄漏：每次调用playAnimation()都创建新的ScheduledExecutorService，未回收线程资源。

修复步骤 #

1. 重置MediaPlayer播放位置
   每次播放前将音频进度重置到起始位置，确保从头播放：

   public static void playAnimation(){
       Platform.runLater(() -> {
           mediaPlayer.seek(Duration.ZERO); // 重置到音频开头
           mediaPlayer.play();
           primaryStage.show();
       });
       // ... 其他代码
   }
   

2. 改用Stage.hide()替代close()
   避免反复关闭Stage，改为隐藏，减少状态异常：

   scheduler.schedule(() -> {
       Platform.runLater(() -> {
           mediaPlayer.stop();
           primaryStage.hide(); // 隐藏而非关闭
       });
   }, 5, TimeUnit.SECONDS);
   

3. 复用全局定时线程池
   全局维护一个线程池，避免重复创建导致的资源泄漏：

   // 在NotificationApp中添加全局线程池
   private static final ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
   
   public static void playAnimation(){
       Platform.runLater(() -> {
           mediaPlayer.seek(Duration.ZERO);
           mediaPlayer.play();
           primaryStage.show();
       });
       // 使用全局线程池
       scheduler.schedule(() -> {
           Platform.runLater(() -> {
               mediaPlayer.stop();
               primaryStage.hide();
           });
       }, 5, TimeUnit.SECONDS);
   }
   
   // 程序退出时关闭线程池
   @Override
   public void stop() throws Exception {
       scheduler.shutdown();
       super.stop();
   }
   

4. 统一资源加载方式
   图片路径改用和音频一致的类加载器方式，避免文件路径问题：

   Image gifImage = new Image(NotificationApp.class.getResource("/img/giphy.gif").toExternalForm());
   

内容的提问来源于stack exchange，提问作者Lalit k