Android中解析lrc歌词

文章由LinuxBoy分享于2019-03-31 06:03:27热评（641）

Android中解析lrc歌词

1.定义歌词实体类

import java.util.HashMap;
import java.util.Map;
/*
* 用于封装歌词的类
* @author
*
* */
public class LrcInfo {
private String title;//music title
private String artist;//artist name
private String album;//album name
private String bySomeBody;//the lrc maker
private String offset;//the time delay or bring forward
private Map<Long,String> infos;//保存歌词信息和时间点一一对应的Map
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getArtist() {
return artist;
}
public void setArtist(String artist) {
this.artist = artist;
}
public String getAlbum() {
return album;
}
public void setAlbum(String album) {
this.album = album;
}
public String getBySomeBody() {
return bySomeBody;
}
public void setBySomeBody(String bySomeBody) {
this.bySomeBody = bySomeBody;
}
public String getOffset() {
return offset;
}
public void setOffset(String offset) {
this.offset = offset;
}
public Map<Long, String> getInfos() {
return infos;
}
public void setInfos(Map<Long, String> infos) {
this.infos = infos;
}
}

2.定义解析类

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.util.Log;
/*
* 此类用来解析LRC文件
*
*/
public class LrcParser {
private LrcInfo lrcinfo= new LrcInfo();
//存放临时时间
private long currentTime = 0 ;
//存放临时歌词
private String currentContent=null;
//用于保存时间点和歌词之间的对应关系
//private Map<Long,String> maps =new HashMap<Long,String>();
private Map<Long,String> maps=new TreeMap<Long,String>();
/*
* 根据文件路径，读取文件，返回一个输入流
* @param path 文件路径
* @return InputStream 文件输入流
* @throws FileNotFoundException
* */
private InputStream readLrcFile(String path) throws FileNotFoundException{
File f= new File(path);
InputStream ins = new FileInputStream(f);
return ins;
}
public LrcInfo parser(String path)throws Exception{
InputStream in = readLrcFile(path);
lrcinfo = parser(in);
return lrcinfo;
}
/**
* @param inputStream 输入流
* @return
*
* */
public LrcInfo parser(InputStream inputStream) throws IOException{
//包装对象
InputStreamReader inr = new InputStreamReader(inputStream);
BufferedReader reader =new BufferedReader(inr);
//一行一行的读，每读一行解析一行
String line =null;
while((line=reader.readLine())!=null){
parserLine(line);
}
//全部解析完后，设置info
lrcinfo.setInfos(maps);
Iterator<Entry<Long, String>> iter = maps.entrySet().iterator();
while (iter.hasNext()) {
Entry<Long,String> entry = (Entry<Long,String>)iter.next();
Long key = entry.getKey();
String val = entry.getValue();
Log.e("---", "key="+key+" val="+val);
}
return lrcinfo;
}
/**
* 利用正则表达式解析每行具体语句
* 并将解析完的信息保存到LrcInfo对象中
* @param line
*/
private void parserLine(String line) {
//获取歌曲名信息
if(line.startsWith("[ti:")){
String title =line.substring(4,line.length()-1);
Log.i("","title-->"+title);
lrcinfo.setTitle(title);
}
//取得歌手信息
else if(line.startsWith("[ar:")){
String artist = line.substring(4, line.length()-1);
Log.i("","artist-->"+artist);
lrcinfo.setArtist(artist);
}
//取得专辑信息
else if(line.startsWith("[al:")){
String album =line.substring(4, line.length()-1);
Log.i("","album-->"+album);
lrcinfo.setAlbum(album);
}
//取得歌词制作者
else if(line.startsWith("[by:")){
String bysomebody=line.substring(4, line.length()-1);
Log.i("","by-->"+bysomebody);
lrcinfo.setBySomeBody(bysomebody);
}
//通过正则表达式取得每句歌词信息
else{
//设置正则表达式
String reg ="\\[(\\d{1,2}:\\d{1,2}\\.\\d{1,2})\\]|\\[(\\d{1,2}:\\d{1,2})\\]";
Pattern pattern = Pattern.compile(reg);
Matcher matcher=pattern.matcher(line);
//如果存在匹配项则执行如下操作
while(matcher.find()){
//得到匹配的内容
String msg=matcher.group();
//得到这个匹配项开始的索引
int start = matcher.start();
//得到这个匹配项结束的索引
int end = matcher.end();
//得到这个匹配项中的数组
int groupCount = matcher.groupCount();
for(int index =0;index<groupCount;index++){
String timeStr = matcher.group(index);
Log.i("","time["+index+"]="+timeStr);
if(index==0){
//将第二组中的内容设置为当前的一个时间点
currentTime=str2Long(timeStr.substring(1, timeStr.length()-1));
}
}
//得到时间点后的内容
String[] content = pattern.split(line);
//for(int index =0; index<content.length; index++){
Log.i("","content="+content[content.length-1]);
//if(index==content.length-1){
//将内容设置魏当前内容
currentContent = content[content.length-1];
//}
//}
//设置时间点和内容的映射
maps.put(currentTime, currentContent);
Log.i("","currentTime--->"+currentTime+" currentContent--->"+currentContent);
//遍历map
}
}
}
private long str2Long(String timeStr){
//将时间格式为xx:xx.xx，返回的long要求以毫秒为单位
Log.i("","timeStr="+timeStr);
String[] s = timeStr.split("\\:");
int min = Integer.parseInt(s[0]);
int sec=0;
int mill=0;
if(s[1].contains(".")){
String[] ss=s[1].split("\\.");
sec =Integer.parseInt(ss[0]);
mill=Integer.parseInt(ss[1]);
Log.i("","s[0]="+s[0]+"s[1]"+s[1]+"ss[0]="+ss[0]+"ss[1]="+ss[1]);
}else{
sec=Integer.parseInt(s[1]);
Log.i("","s[0]="+s[0]+"s[1]"+s[1]);
}
return min*60*1000+sec*1000+mill*10;
}
}

3.解析调用

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class Lyric extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LrcParser lp =new LrcParser();
String path="/sdcard/Hotel California";
try{
Log.i("____Lyric___", "--begin--");
lp.parser(path);
}catch(Exception e){
}
}
}

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