android 音乐播放器-------歌词同步 lrc

lrc格式
：

[al:这首歌所在的唱片集
]

[ar:歌词作者
]

[by:本LRC文件的创建者
]

[offset:+/- 以毫秒为单位整体时间戳调整，+增加，-减小
]

[re:创建此LRC文件的播放器或编辑器
]

[ti:歌词(歌曲)的标题
]

[ve:程序的版本
]

时间标记的格式为[mm:ss.xx]
其中mm
为分钟数，ss
为秒数并且xx
为百分之一秒

例子：

[ti:爱]

[ar:小虎队]

[al:华纳国语情浓13首]

[by:爱上你了音乐网]

百度百科关于lrc的解释：
http://baike.baidu.com/view/80650.htm
[ti:青花瓷]

[ar:周杰伦]

[al:我很忙]

[by:张琪]

[00:00.00]发送短信18到291199下载该歌曲到手机

[00:01.11]青花瓷

[03:36.49]

[00:21.39]素眉勾勒秋千话北风龙转丹　

[00:26.08]屏层鸟绘的牡丹一如你梳妆

[00:30.46]黯然腾香透过窗心事我了然　

[00:34.93]宣纸上皱边直尺各一半

[00:39.49]油色渲染侍女图因为被失藏　

[00:43.83]而你嫣然的一笑如含苞待放

[00:48.30]你的美一缕飘散　

[00:50.77]去到我去不了的地方

[02:23.97][00:55.77]

[03:01.92][02:25.63][00:56.90]天正在等烟雨　

[03:03.57][02:27.91][00:58.99]而我在等你　

[03:05.92][02:30.44][01:00.93]炊烟袅袅升起　

[03:07.76][02:32.25][01:03.49]隔江千万里

[03:10.36][02:34.85][01:05.84]在平地书刻你房间上的飘影　

[03:14.67][02:38.73][01:09.87]就当我为遇见你伏笔

[03:18.83][02:43.35][01:14.34]天正在等烟雨　

[03:21.20][02:45.60][01:16.68]而我在等你　

[03:23.71][02:48.01][01:18.99]月色被打捞起　

[03:25.74][02:50.10][01:21.18]掩盖了结局

[03:28.33][02:52.54][01:23.72]如传世的青花瓷在独自美丽　

[03:32.30][02:56.67][01:27.65]你眼的笑意

[01:50.25]色白花青的景已跃然于碗底　

[01:54.69]临摹宋体落款时却惦记着你

[01:59.22]你隐藏在药效里一千年的秘密　

[02:03.75]急溪里犹如羞花沾落地

[02:08.32]林外芭蕉　惹咒语　

[02:10.57]梦幻的铜绿

[02:12.84]而我路过那江南小镇的等你

[02:17.19]在泼墨山水画里　

[02:19.75]你从墨色深处被隐去

前面“[
]”中的数字表示其后歌词的开始时间。例如，“[01:50.25]色白花青的景已跃然于碗底”表示在1分50.25秒时，歌词内容是“色白花青的景已跃
然于碗底”。

还有一种形式是“[03:01.92][02:25.63][00:56.90]天正在等烟雨”这种形式常用于赋格部分（俗称：歌曲的高潮部分），它表示
在 03:01.92, 02:25.63, 00:56.90 时的歌词都是“天正在等烟雨”。

代码实现，歌词类

package com.android.music;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Collections;
import java.util.Comparator;
import java.util.Vector;
import android.util.Log;
public class LRCUtils {
private static final String TAG = "LRCUtils";

MediaPlayActivity mediaPlay;

private static Vector<timelrc> lrclist;
private boolean IsLyricExist = false;
private int lastLine = 0;

public LRCUtils(MediaPlayActivity mediaPlayActivity) {
mediaPlay = mediaPlayActivity;
}
public void RefreshLRC(int current)
{
if (IsLyricExist){
for(int i = 0; i < lrclist.size(); i++)
{
if(current < lrclist.get(i).getTimePoint())
if(i == 0 || current >= lrclist.get(i-1).getTimePoint())
{
Log.d(TAG,"string = "+lrclist.get(i-1).getLrcString());
mediaPlay.setLRCText(lrclist.get(i-1).getLrcString(),lastLine!=(i-1));
lastLine = i-1;
//	        			playlrcText.setText(lrclist.get(i-1).getLrcString());
}

}
}
}

public void ReadLRC(File f)
{
try
{
if (!f.exists())
{
Log.d(TAG,"not exit the lrc file");
IsLyricExist = false;
//				strLRC = main.getResources().getString(R.string.lrcservice_no_lyric_found);
}
else
{
lrclist = new Vector<timelrc>();
IsLyricExist = true;
InputStream is = new BufferedInputStream(new FileInputStream(f));
BufferedReader br = new BufferedReader(new InputStreamReader(is, GetCharset(f)));
String strTemp = "";
while ((strTemp = br.readLine()) != null)
{
//					Log.d(TAG,"strTemp = "+strTemp);
strTemp = AnalyzeLRC(strTemp); // ����� LRC
}
br.close();
is.close();
Collections.sort(lrclist, new Sort());

for(int i=0;i<lrclist.size();i++){
Log.d(TAG,"time = "+lrclist.get(i).getTimePoint()+"   string = "+lrclist.get(i).getLrcString());
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
}

private String AnalyzeLRC(String LRCText)
{
try
{
int pos1 = LRCText.indexOf("["); // ��һ����ǿ�ʼ��
int pos2 = LRCText.indexOf("]"); // ��һ����ǽ����
// ������ǰ���Ƿ���ȷ����һλӦΪ��ǿ�ͷ��[����
if (pos1 == 0 && pos2 != -1)
{// ��ȷ
Long time[] = new Long[GetPossiblyTagCount(LRCText)];
time[0] = TimeToLong(LRCText.substring(pos1 + 1, pos2)); // ��¼��һ�ε�ʱ��
if (time[0] == -1) // ����ȷ��ʱ��
return ""; // LRCText
String strLineRemaining = LRCText;
int i = 1;
while (pos1 == 0 && pos2 != -1)
{

strLineRemaining = strLineRemaining.substring(pos2 + 1); // ʣ�µ�����
pos1 = strLineRemaining.indexOf("[");
pos2 = strLineRemaining.indexOf("]");
if (pos2 != -1)
{
time[i] = TimeToLong(strLineRemaining.substring(pos1 + 1, pos2));
if (time[i] == -1) // ����ȷ��ʱ��
return ""; // LRCText
i++;
}
}

timelrc tl = new timelrc();
for (int j = 0; j < time.length; j++)
{
if (time[j] != null)
{
//						Log.d(TAG,"time["+j+"] = "+time[j].intValue()+"    strLineRemaining = "+strLineRemaining);
tl.setTimePoint(time[j].intValue());
tl.setLrcString(strLineRemaining);

lrclist.add(tl);
tl = new timelrc();
//						map.put(time[j], strLineRemaining);
//						lstTimeStamp.add(time[j]);
}
}
return strLineRemaining;
}
else
return "";
}
catch (Exception e)
{
return "";
}
}

private int GetPossiblyTagCount(String Line)
{
String strCount1[] = Line.split("//[");
String strCount2[] = Line.split("//]");
if (strCount1.length == 0 && strCount2.length == 0)
return 1;
else if (strCount1.length > strCount2.length)
return strCount1.length;
else
return strCount2.length;
}

public long TimeToLong(String Time)
{
try
{
String[] s1 = Time.split(":");
int min = Integer.parseInt(s1[0]);
String[] s2 = s1[1].split("//.");
int sec = Integer.parseInt(s2[0]);
int mill = 0;
if (s2.length > 1)
mill = Integer.parseInt(s2[1]);
return min * 60 * 1000 + sec * 1000 + mill * 10;
}
catch (Exception e)
{
return -1;
}
}
public String GetCharset(File file){
String charset = "GBK";
byte[] first3Bytes = new byte[3];
try
{
boolean checked = false;
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
bis.mark(0);
int read = bis.read(first3Bytes, 0, 3);
if (read == -1)
return charset;
if (first3Bytes[0] == (byte) 0xFF && first3Bytes[1] == (byte) 0xFE)
{
charset = "UTF-16LE";
checked = true;
}
else if (first3Bytes[0] == (byte) 0xFE && first3Bytes[1] == (byte) 0xFF)
{
charset = "UTF-16BE";
checked = true;
}
else if (first3Bytes[0] == (byte) 0xEF && first3Bytes[1] == (byte) 0xBB && first3Bytes[2] == (byte) 0xBF)
{
charset = "UTF-8";
checked = true;
}
bis.reset();
if (!checked)
{
int loc = 0;
while ((read = bis.read()) != -1)
{
loc++;
if (read >= 0xF0)
break;
if (0x80 <= read && read <= 0xBF) // ��������BF���µģ�Ҳ����GBK
break;
if (0xC0 <= read && read <= 0xDF)
{
read = bis.read();
if (0x80 <= read && read <= 0xBF) // ˫�ֽ�(0xC0-0xDF),(0x80-xBF)Ҳ������GB������
continue;
else
break;
}
else if (0xE0 <= read && read <= 0xEF)
{// Ҳ�п��ܳ��?���Ǽ��ʽ�С
read = bis.read();
if (0x80 <= read && read <= 0xBF)
{
read = bis.read();
if (0x80 <= read && read <= 0xBF)
{
charset = "UTF-8";
break;
}
else
break;
}
else
break;
}
}
}
bis.close();
}
catch (Exception e)
{
e.printStackTrace();
}
return charset;
}

private class Sort implements Comparator<timelrc> {
public Sort() {
}
public int compare(timelrc tl1, timelrc tl2) {
return sortUp(tl1, tl2);
}
private int sortUp(timelrc tl1, timelrc tl2) {
if (tl1.getTimePoint() < tl2.getTimePoint())
return -1;
else if (tl1.getTimePoint() > tl2.getTimePoint())
return 1;
else
return 0;
}
}

public static class timelrc {
private String lrcString;
private int sleepTime;
private int timePoint;
timelrc() {
lrcString = null;
sleepTime = 0;
timePoint = 0;
}
public void setLrcString(String lrc) {
lrcString = lrc;
}
public void setSleepTime(int time) {
sleepTime = time;
}
public void setTimePoint(int tPoint) {
timePoint = tPoint;
}
public String getLrcString() {
return lrcString;
}
public int getSleepTime() {
return sleepTime;
}
public int getTimePoint() {
return timePoint;
}
};

}

实现思路：

定义一个类，timelrc，用来存放每一句歌词的内容和时间，每当播放的歌曲的时间改变时，即显示播放的seekbar改变时，刷新歌词RefreshLRC(int)，并将取得的歌词的getLrcString()显示到应用程序中。

使用方法：

在音乐播放的activity界面，获取当前播放歌曲的path，歌词路径。

private void getLrcPath(String path) {
Log.d(TAG,"path = "+path);
if (path != null) {
path = path.substring(0, path.lastIndexOf(".")).concat(".lrc");
File file = new File(path);
lrcService.ReadLRC(file);
}

}

通过该函数的调用，如上类会将歌词存储起来。

当播放时间改变时，调用lrcService.RefreshLRC(current); 刷新

在播放界面显示正在播放的歌词内容

public void setLRCText(String lrcString,boolean changeLine) {

if(changeLine){

flipperLrc.showNext();

}

playlrcText.setText(lrcString);

}

（未完待续。。。）