我使用 JLayer 在 Java 中创建了一个媒体播放器，它接受 mp3 文件。一旦用户播放该歌曲，我也会显示特定歌曲的歌词，但现在我想以某种方式突出显示或更改歌曲中听到的歌词的文本颜色（如卡拉 OK）。我只需要为一首歌曲执行此操作 - 我将在我的程序中实现歌词。我已经搜索过如何做到这一点，但似乎无法准确找到我正在寻找的东西。下面我将代码添加到播放音乐文件的类中。先谢谢了！
public class PlayMusic {
/**
* Global variables. FileInputStream obtains input bytes from a file system
* and reads streas of raw bytes. BufferedInputStream adds functionality
* to the fis, and creates an internal buffer array.
*/
private String filename;
private Player player;
private boolean canResume;
private boolean valid;
private int total;
private int stopped;
FileInputStream fis;
BufferedInputStream bis;
/**
* Constructor the takes in the path of the mp3 file to be played.
* @param filename - path of the mp3 file
*/
public PlayMusic(String filename) {
this.filename = filename;
this.canResume = false;
this.valid = false;
this.total = 0;
this.stopped = 0;
this.fis = null;
this.bis = null;
}
/**
* Function called to stop a song altogether as opposed to pausing.
*/
public void close() {
if (player != null)
player.close();
stopped = 0;
fis = null;
bis = null;
player = null;
canResume = false;
}
/**
* Function called to pause a song. Fis.available() is a method that returns
* the number of remaining bytes that can be read from the input stream.
*/
public void pause(){
try {
if (fis!=null)
stopped = fis.available();
if (player!= null)
player.close();
fis = null;
bis = null;
player = null;
if(valid)
canResume = true;
} catch (IOException e) {
}
}
/**
* Function called when we want to resume a song from where it left off
* after being paused.
*/
public void resume()
{
if(!canResume)
return;
if(play(total-stopped))
canResume = false;
}
/**
* Function called to play the song and keep track of where in the song the
* user presses stop in order for the resume button to work properly. Fis.skip
* skips over and discards pos bytes of data from fis.
* @param pos - The position of the song in which we want to resume play
* @return
*/
public boolean play(int pos) {
valid = true;
canResume = false;
try {
fis = new FileInputStream(filename);
total = fis.available();
if(pos> -1)
fis.skip(pos);
bis = new BufferedInputStream(fis);
player = new Player(bis);
}
catch (Exception e) {
System.out.println("Problem playing file " + filename);
System.out.println(e);
}
/**
* Run the play button in a new thread so the music plays in the background.
*/
new Thread() {
public void run() {
try { player.play(); }
catch (Exception e) { System.out.println(e); valid = false; }
}
}.start();
return valid;
}
}