在High Sierra和Mojave机器人上完美运行的JavaFx应用程序在Catalina上播放媒体文件时挂起。
我在这里显示java文件。我不知道该如何附加文件，否则我可以提供可以轻松复制的媒体文件。
我创建了一个Java Fx应用程序，该应用程序只有3个类用于在catalina上播放媒体文件，并且该应用程序也复制了相同的行为。 这是在OSX catalina上使用这些类的项目类文件。
我不明白为什么它仅在OSX catalina上失败。请提出此代码有什么问题。
public class PlayingMedia extends Application {
Player player;
FileChooser fileChooser;
public void start(final Stage primaryStage)
{
// setting up the stages
MenuItem open = new MenuItem("Open");
Menu file = new Menu("File");
MenuBar menu = new MenuBar();
// Connecting the above three
file.getItems().add(open); // it would connect open with file
menu.getMenus().add(file);
// Adding functionality to switch to different videos
fileChooser = new FileChooser();
open.setOnAction(new EventHandler<ActionEvent>(){
public void handle(ActionEvent e)
{
// Pausing the video while switching
if(player!=null && player.player!=null)
player.player.pause();
File file = fileChooser.showOpenDialog(primaryStage);
// Choosing the file to play
if (file != null) {
try {
if(player!=null){
player.dispose();
}
player = new Player(file.toURI().toURL().toExternalForm());
player.setTop(menu);
Scene scene = new Scene(player, 720, 535, Color.BLACK);
primaryStage.setScene(scene);
}
catch (MalformedURLException e1) {
e1.printStackTrace();
}
}
}
});
// here you can choose any video
player = new Player();
// Setting the menu at the top
player.setTop(menu);
// Adding player to the Scene
Scene scene = new Scene(player, 720, 535, Color.BLACK);
// height and width of the video player
// background color set to Black
primaryStage.setScene(scene); // Setting the scene to stage
primaryStage.show(); // Showing the stage
}
// Main function to launch the application
public static void main(String[] args){
launch(args);
}
}
public class MediaBar extends HBox{
Slider time = new Slider(); // Slider for time
Slider vol = new Slider(); // Slider for volume
Button PlayButton = new Button("||"); // For pausing the player
Label volume = new Label("Volume: ");
MediaPlayer player;
public MediaBar(MediaPlayer play)
{ // Default constructor taking
// the MediaPlayer object
player = play;
setAlignment(Pos.CENTER); // setting the HBox to center
setPadding(new Insets(5, 10, 5, 10));
// Settih the preference for volume bar
vol.setPrefWidth(70);
vol.setMinWidth(30);
vol.setValue(100);
HBox.setHgrow(time, Priority.ALWAYS);
PlayButton.setPrefWidth(30);
// Adding the components to the bottom
getChildren().add(PlayButton); // Playbutton
getChildren().add(time); // time slider
getChildren().add(volume); // volume slider
getChildren().add(vol);
// Adding Functionality
// to play the media player
PlayButton.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent e)
{
Status status = player.getStatus(); // To get the status of Player
if (status == status.PLAYING) {
// If the status is Video playing
if (player.getCurrentTime().greaterThanOrEqualTo(player.getTotalDuration())) {
// If the player is at the end of video
player.seek(player.getStartTime()); // Restart the video
player.play();
}
else {
// Pausing the player
player.pause();
PlayButton.setText(">");
}
} // If the video is stopped, halted or paused
if (status == Status.HALTED || status == Status.STOPPED || status == Status.PAUSED) {
player.play(); // Start the video
PlayButton.setText("||");
}
}
});
// Providing functionality to time slider
player.currentTimeProperty().addListener(new ChangeListener<Duration>() {
@Override
public void changed(ObservableValue<? extends Duration> observable, Duration oldValue, Duration newValue) {
updatesValues();
}
});
// Inorder to jump to the certain part of video
time.valueProperty().addListener(new ChangeListener<Number>() {
@Override
public void changed(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
if (time.isPressed()) { // It would set the time
// as specified by user by pressing
player.seek(player.getMedia().getDuration().multiply(time.getValue() / 100));
}
}
});
// providing functionality to volume slider
vol.valueProperty().addListener(new ChangeListener<Number>() {
@Override
public void changed(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
if (vol.isPressed()) {
player.setVolume(vol.getValue() / 100); // It would set the volume
// as specified by user by pressing
}
}
});
}
// Outside the constructor
protected void updatesValues()
{
Platform.runLater(new Runnable() {
public void run()
{
// Updating to the new time value
// This will move the slider while running your video
time.setValue(player.getCurrentTime().toMillis()/player.getTotalDuration().toMillis() * 100);
}
});
}
}
公共类Player扩展BorderPane {
public Media media;
public MediaPlayer player;
public MediaView view;
public Pane mpane;
public MediaBar bar;
public Player(){
}
public Player(String file) { // Default constructor
media = new Media(file);
player = new MediaPlayer(media);
view = new MediaView(player);
mpane = new Pane();
mpane.getChildren().add(view); // Calling the function getChildren
// inorder to add the view
setCenter(mpane);
bar = new MediaBar(player); // Passing the player to MediaBar
setBottom(bar); // Setting the MediaBar at bottom
setStyle("-fx-background-color:#bfc2c7"); // Adding color to the mediabar
player.play(); // Making the video play
}
public void dispose(){
if(player!=null){
player.stop();
player.dispose();
}
}
}