我怎样才能修复我的进度并寻找适用于所有媒体的滑块？

Question

所以我在 javafx (eclipse) 中制作了一个媒体播放器，我曾经将滑块用作进度条和进度条，但出于某种原因，sider 只显示第一个媒体的进度，只要我按下一个进度不再显示了。我仍然可以寻求我曾经的位置，但进展不会显示这是主要代码 class 我有一个 class 播放列表项，它包含给定目录中所有文件的名称

package application;
import java.io.File;
import java.net.URL; 
import java.util.ResourceBundle;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.util.Duration;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.beans.binding.Bindings;
import javafx.beans.property.DoubleProperty;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.scene.control.Label;
import javafx.scene.control.Slider;
import javafx.scene.input.MouseEvent;
import javafx.scene.media.Media;
import javafx.event.EventHandler;

public class MainController implements Initializable {
    @FXML
    private MediaView mv;
    private MediaPlayer mp;
    private Media me;
    @FXML
    private Label title;
    @FXML
    Slider volslider;
    int pointer = 0;
    @FXML
    Slider progBar;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        String path = new File("src/media/" + application.Playlist.playnext(pointer)).getAbsolutePath();
        me = new Media(new File(path).toURI().toString());
        mp = new MediaPlayer(me);
        mv.setMediaPlayer(mp);
        // mp.setAutoPlay(true);
        DoubleProperty width = mv.fitWidthProperty();
        DoubleProperty height = mv.fitHeightProperty();
        width.bind(Bindings.selectDouble(mv.sceneProperty(), "width"));
        height.bind(Bindings.selectDouble(mv.sceneProperty(), "height"));

        mp.setOnReady(new Runnable() {

            @Override
            public void run() {

                volslider.setValue(mp.getVolume() * 100);

                volslider.valueProperty().addListener(new InvalidationListener() {

                    @Override
                    public void invalidated(Observable observable) {
                        mp.setVolume(volslider.getValue() / 100);
                    }

                });
                mp.currentTimeProperty().addListener(new ChangeListener<Duration>() {

                    @Override
                    public void changed(ObservableValue<? extends Duration> observable, Duration oldValue,
                            Duration newValue) {
                        progBar.setValue((newValue.toSeconds() / mp.getTotalDuration().toSeconds()) * 100);
                    }
                });
                progBar.setOnMouseClicked(new EventHandler<MouseEvent>() {

                    @Override
                    public void handle(MouseEvent event) {
                        mp.seek(Duration.seconds((progBar.getValue() / 100) * mp.getTotalDuration().toSeconds()));

                    }
                });

            }
        });
    }

    public void play(ActionEvent event) {

        mp.play();

    }

    public void pause(ActionEvent event) {
        mp.pause();
    }

    public void speedup(ActionEvent event) {
        mp.setRate(2);
    }

    public void normalspeed(ActionEvent event) {
        mp.setRate(1);
    }

    public void slowmo(ActionEvent event) {
        mp.setRate(0.5);
    }

    public void reload(ActionEvent event) {
        progBar.setValue(0);
        mp.seek(mp.getStartTime());
        mp.stop();
    }

    public void end(ActionEvent event) {
        progBar.setValue(100);
        mp.seek(mp.getTotalDuration());
        mp.stop();
    }

    public void next(ActionEvent event) {
        progBar.setValue(0);
        mp.seek(mp.getTotalDuration());
        mp.stop();
        pointer++;
        pointer = application.Playlist.checkrange(pointer);
        String path = new File("src/media/" + application.Playlist.playnext(pointer)).getAbsolutePath();
        me = new Media(new File(path).toURI().toString());
        mp = new MediaPlayer(me);
        mv.setMediaPlayer(mp);
        mp.play();

    }

    public void previous(ActionEvent event) {
        // progBar.setValue(0);
        mp.seek(mp.getTotalDuration());
        mp.stop();
        pointer--;
        pointer = application.Playlist.checkrange(pointer);
        String path = new File("src/media/" + application.Playlist.playnext(pointer)).getAbsolutePath();
        me = new Media(new File(path).toURI().toString());
        mp = new MediaPlayer(me);
        mv.setMediaPlayer(mp);
        mp.play();

    }
}

Answer 1

在您的 next() 方法中，您创建了一个新的 MediaPlayer，但您没有更新对已在初始化函数中绑定的 currentTime 属性的引用。如果您想更改它，请取消绑定旧 MediaPlayer 的 currentTime 属性，然后将其绑定到 next() 中的新 MediaPlayer 实例。

我怎样才能修复我的进度并寻找适用于所有媒体的滑块？

how can i fix my progress and seek slider to work for all media?

java

javafx

seekbar

media-player

scenebuilder