📅  最后修改于: 2020-10-14 08:57:24             🧑  作者: Mango
让我们进一步增强应用程序,在其中我们将更新vlcj-具有音频播放功能的“处理键盘事件”一章。与视频播放类似,我们也可以通过简单的方式控制音频播放。
AudioPlayerComponent audioPlayerComponent = new AudioPlayerComponent();
现在使用媒体,我们可以使用以下语法轻松在我们的应用程序中加载音频-
audioPlayerComponent.mediaPlayer().media().startPaused(path);
现在使用控件,我们可以使用以下语法在我们的应用程序中轻松播放音频剪辑-
audioPlayerComponent.mediaPlayer().controls().play();
打开在Eclipse的“环境设置”一章中创建的项目mediaPlayer。
使用以下代码更新App.java-
App.java
package com.tutorialspoint.media;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import uk.co.caprica.vlcj.player.base.MediaPlayer;
import uk.co.caprica.vlcj.player.base.MediaPlayerEventAdapter;
import uk.co.caprica.vlcj.player.component.AudioPlayerComponent;
import uk.co.caprica.vlcj.player.component.EmbeddedMediaPlayerComponent;
public class App extends JFrame {
private static final long serialVersionUID = 1L;
private static final String TITLE = "My First Media Player";
private static final String VIDEO_PATH = "D:\\Downloads\\sunset-beach.mp4";
private static final String AUDIO_PATH = "D:\\Downloads\\time-to-feel-good.mp3";
private final EmbeddedMediaPlayerComponent mediaPlayerComponent;
private final AudioPlayerComponent audioPlayerComponent;
private JButton playButton;
private JButton pauseButton;
private JButton rewindButton;
private JButton skipButton;
private JButton playAudioButton;
private JButton pauseAudioButton;
public App(String title) {
super(title);
mediaPlayerComponent = new EmbeddedMediaPlayerComponent() {
@Override
public void mouseClicked(MouseEvent e) {
super.mouseClicked(e);
System.out.println("Mouse Clicked. (" + e.getX() + "," + e.getY() + ")");
}
@Override
public void mouseWheelMoved(MouseWheelEvent e) {
super.mouseWheelMoved(e);
System.out.println("Mouse wheel moved. " + e.getScrollAmount());
}
@Override
public void keyPressed(KeyEvent e) {
super.keyPressed(e);
System.out.println("Key pressed. " + e.getKeyCode());
}
@Override
public void playing(MediaPlayer mediaPlayer) {
super.playing(mediaPlayer);
System.out.println("Media Playback started.");
}
@Override
public void finished(MediaPlayer mediaPlayer) {
super.playing(mediaPlayer);
System.out.println("Media Playback finished.");
}
@Override
public void error(MediaPlayer mediaPlayer) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
System.out.println("Failed to load Media.");
}
});
}
};
audioPlayerComponent = new AudioPlayerComponent();
audioPlayerComponent.mediaPlayer().events().addMediaPlayerEventListener(new MediaPlayerEventAdapter() {
@Override
public void finished(MediaPlayer mediaPlayer) {
System.out.println("Audio Playback Finished.");
}
@Override
public void error(MediaPlayer mediaPlayer) {
System.out.println("Failed to load Audio.");
}
});
}
public void initialize() {
this.setBounds(100, 100, 600, 400);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
mediaPlayerComponent.release();
System.exit(0);
}
});
JPanel contentPane = new JPanel();
contentPane.setLayout(new BorderLayout());
contentPane.add(mediaPlayerComponent, BorderLayout.CENTER);
//Create a video border
Border videoBorder = BorderFactory.createTitledBorder("Video Controls");
//Create an audio border
Border audioBorder = BorderFactory.createTitledBorder("Audio Controls");
JPanel videoControlsPane = new JPanel();
videoControlsPane.setBorder(videoBorder);
playButton = new JButton("Play");
videoControlsPane.add(playButton);
pauseButton = new JButton("Pause");
videoControlsPane.add(pauseButton);
rewindButton = new JButton("Rewind");
videoControlsPane.add(rewindButton);
skipButton = new JButton("Skip");
videoControlsPane.add(skipButton);
JPanel audioControlsPane = new JPanel();
audioControlsPane.setBorder(audioBorder);
playAudioButton = new JButton("Play");
audioControlsPane.add(playAudioButton);
pauseAudioButton = new JButton("Pause");
audioControlsPane.add(pauseAudioButton);
JPanel controlsPane = new JPanel();
controlsPane.add(videoControlsPane);
controlsPane.add(audioControlsPane);
contentPane.add(controlsPane, BorderLayout.SOUTH);
playButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mediaPlayerComponent.mediaPlayer().controls().play();
}
});
pauseButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mediaPlayerComponent.mediaPlayer().controls().pause();
}
});
rewindButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mediaPlayerComponent.mediaPlayer().controls().skipTime(-14000);
}
});
skipButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mediaPlayerComponent.mediaPlayer().controls().skipTime(4000);
}
});
playAudioButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
audioPlayerComponent.mediaPlayer().controls().play();
}
});
pauseAudioButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
audioPlayerComponent.mediaPlayer().controls().pause();
}
});
this.setContentPane(contentPane);
this.setVisible(true);
}
public void loadVideo(String path) {
mediaPlayerComponent.mediaPlayer().media().startPaused(path);
}
public void loadAudio(String path) {
audioPlayerComponent.mediaPlayer().media().startPaused(path);
}
public static void main( String[] args ){
try {
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
}
catch (Exception e) {
System.out.println(e);
}
App application = new App(TITLE);
application.initialize();
application.setVisible(true);
application.loadVideo(VIDEO_PATH);
application.loadAudio(AUDIO_PATH);
}
}
通过右键单击文件来运行应用程序,然后选择以Java应用程序运行。成功启动后,如果一切正常,则应显示以下结果-
现在,按“音频控件”中的“播放”按钮,剪辑将开始播放。单击暂停按钮将暂停音频。