我想创建一个JavaFX媒体播放器应用程序，它有两个阶段（主要和次要），显示相同的视频或播放相同的音频文件，但是从主要阶段控制。这个想法是将第二阶段移动到第二个监视器或连接的视频投影仪，并始终处于全屏模式，没有可见的控件。
这可能吗？
以下是MediaPlayer.java的代码。
package mediaplayer;
import java.io.File;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class FulldomeMediaPlayer extends Application {
private File file = new File("./media/video.mp4");
private final String MEDIA_URL = file.toURI().toString();
@Override
public void start(Stage primaryStage) {
// Create media player.
Media media = new Media(MEDIA_URL);
MediaPlayer mediaPlayer = new MediaPlayer(media);
MediaControl mediaControl = new MediaControl(mediaPlayer);
Group root = new Group();
Scene scene = new Scene(root, 512, 512);
scene.setRoot(mediaControl);
primaryStage.setScene(scene);
primaryStage.setTitle("Media Player");
primaryStage.setFullScreen(false);
primaryStage.show();
Stage secondStage = new Stage();
secondStage.setX(1920.0);
secondStage.setY(0.0);
secondStage.setFullScreen(true);
//secondStage.setScene(scene);
secondStage.setTitle("Second Media Player");
secondStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
以下是MediaControl.java的代码，它具有启动和停止视频的控件。它基于Oracle示例，但我对其进行了修改，以便视频可以在边框窗格的中心面板中调整大小。
package mediaplayer;
import javafx.application.Platform;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.layout.*;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.Slider;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaPlayer.Status;
import javafx.scene.media.MediaView;
import javafx.util.Duration;
public class MediaControl extends BorderPane {
private MediaPlayer mp;
private MediaView mediaView;
private final boolean repeat = false;
private boolean stopRequested = false;
private boolean atEndOfMedia = false;
private Duration duration;
private Slider timeSlider;
private Label playTime;
private Slider volumeSlider;
private HBox mediaBar;
public MediaControl(final MediaPlayer mp) {
this.mp = mp;
setStyle("-fx-background-color: #bfc2c7;");
mediaView = new MediaView(mp);
StackPane mvPane = new StackPane();
mvPane.getChildren().add(mediaView);
mediaView.fitWidthProperty().bind(mvPane.widthProperty());
mediaView.fitHeightProperty().bind(mvPane.heightProperty());
mediaView.setPreserveRatio(true);
setCenter(mvPane);
mediaBar = new HBox();
mediaBar.setAlignment(Pos.CENTER);
mediaBar.setPadding(new Insets(5, 10, 5, 10));
BorderPane.setAlignment(mediaBar, Pos.CENTER);
final Button playButton = new Button(">");
playButton.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent e) {
Status status = mp.getStatus();
if (status == Status.UNKNOWN || status == Status.HALTED) {
// don't do anything in these states
return;
}
if (status == Status.PAUSED
|| status == Status.READY
|| status == Status.STOPPED) {
// rewind the movie if we're sitting at the end
if (atEndOfMedia) {
mp.seek(mp.getStartTime());
atEndOfMedia = false;
}
mp.play();
} else {
mp.pause();
}
}
});
mp.currentTimeProperty().addListener(new InvalidationListener() {
public void invalidated(Observable ov) {
updateValues();
}
});
mp.setOnPlaying(new Runnable() {
public void run() {
if (stopRequested) {
mp.pause();
stopRequested = false;
} else {
playButton.setText("||");
}
}
});
mp.setOnPaused(new Runnable() {
public void run() {
System.out.println("onPaused");
playButton.setText(">");
}
});
mp.setOnReady(new Runnable() {
public void run() {
duration = mp.getMedia().getDuration();
updateValues();
}
});
mp.setCycleCount(repeat ? MediaPlayer.INDEFINITE : 1);
mp.setOnEndOfMedia(new Runnable() {
public void run() {
if (!repeat) {
playButton.setText(">");
stopRequested = true;
atEndOfMedia = true;
}
}
});
mediaBar.getChildren().add(playButton);
// Add spacer
Label spacer = new Label(" ");
mediaBar.getChildren().add(spacer);
// Add Time label
Label timeLabel = new Label("Time: ");
mediaBar.getChildren().add(timeLabel);
// Add time slider
timeSlider = new Slider();
HBox.setHgrow(timeSlider, Priority.ALWAYS);
timeSlider.setMinWidth(50);
timeSlider.setMaxWidth(Double.MAX_VALUE);
timeSlider.valueProperty().addListener(new InvalidationListener() {
public void invalidated(Observable ov) {
if (timeSlider.isValueChanging()) {
// multiply duration by percentage calculated by slider position
mp.seek(duration.multiply(timeSlider.getValue() / 100.0));
}
}
});
mediaBar.getChildren().add(timeSlider);
// Add Play label
playTime = new Label();
playTime.setPrefWidth(130);
playTime.setMinWidth(50);
mediaBar.getChildren().add(playTime);
// Add the volume label
Label volumeLabel = new Label("Vol: ");
mediaBar.getChildren().add(volumeLabel);
// Add Volume slider
volumeSlider = new Slider();
volumeSlider.setPrefWidth(70);
volumeSlider.setMaxWidth(Region.USE_PREF_SIZE);
volumeSlider.setMinWidth(30);
volumeSlider.valueProperty().addListener(new InvalidationListener() {
public void invalidated(Observable ov) {
if (volumeSlider.isValueChanging()) {
mp.setVolume(volumeSlider.getValue() / 100.0);
}
}
});
mediaBar.getChildren().add(volumeSlider);
setBottom(mediaBar);
}
protected void updateValues() {
if (playTime != null && timeSlider != null && volumeSlider != null) {
Platform.runLater(new Runnable() {
public void run() {
Duration currentTime = mp.getCurrentTime();
playTime.setText(formatTime(currentTime, duration));
timeSlider.setDisable(duration.isUnknown());
if (!timeSlider.isDisabled()
&& duration.greaterThan(Duration.ZERO)
&& !timeSlider.isValueChanging()) {
timeSlider.setValue(currentTime.divide(duration).toMillis()
* 100.0);
}
if (!volumeSlider.isValueChanging()) {
volumeSlider.setValue((int) Math.round(mp.getVolume()
* 100));
}
}
});
}
}
private static String formatTime(Duration elapsed, Duration duration) {
int intElapsed = (int) Math.floor(elapsed.toSeconds());
int elapsedHours = intElapsed / (60 * 60);
if (elapsedHours > 0) {
intElapsed -= elapsedHours * 60 * 60;
}
int elapsedMinutes = intElapsed / 60;
int elapsedSeconds = intElapsed - elapsedHours * 60 * 60
- elapsedMinutes * 60;
if (duration.greaterThan(Duration.ZERO)) {
int intDuration = (int) Math.floor(duration.toSeconds());
int durationHours = intDuration / (60 * 60);
if (durationHours > 0) {
intDuration -= durationHours * 60 * 60;
}
int durationMinutes = intDuration / 60;
int durationSeconds = intDuration - durationHours * 60 * 60
- durationMinutes * 60;
if (durationHours > 0) {
return String.format("%d:%02d:%02d/%d:%02d:%02d",
elapsedHours, elapsedMinutes, elapsedSeconds,
durationHours, durationMinutes, durationSeconds);
} else {
return String.format("%02d:%02d/%02d:%02d",
elapsedMinutes, elapsedSeconds, durationMinutes,
durationSeconds);
}
} else {
if (elapsedHours > 0) {
return String.format("%d:%02d:%02d", elapsedHours,
elapsedMinutes, elapsedSeconds);
} else {
return String.format("%02d:%02d", elapsedMinutes,
elapsedSeconds);
}
}
}
}
感谢。
答案 0 :(得分：1)
只需在新场景中创建一个新的MediaView即可在第二个窗口中显示。引用您在第一个场景中使用的相同MediaPlayer，第一个场景中提供的控件将同时控制两个MediaView。
secondStage.setScene(new Scene(new StackPane(new MediaView(mediaPlayer))));