android音乐播放器开发 SweetMusicPlayer 智能匹配本地歌词
上一篇写了使用MediaPlayer播放音乐，http://blog.csdn.net/huweigoodboy/article/details/39861539。
代码地址：https://github.com/huweigoodboy/SweetMusicPlayer
现在来将一下加载本地歌词。好了，还是用那张图。
一，从内存卡上匹配歌词
将会从以下路径匹配
1) SweetMusicPlayer/Lyrics/
2) 歌曲同级目录下
3) 歌曲父级目录/lryics(Lryic加不加s，首字母大小与否又分情况)
LrcContent
package com.huwei.sweetmusicplayer.models;
public class LrcContent {
private String lrcStr; //歌词内容
private int lrcTime; //当前歌词时间
public String getLrcStr() {
return lrcStr;
}
public void setLrcStr(String lrcStr) {
this.lrcStr = lrcStr;
}
public int getLrcTime() {
return lrcTime;
}
public void setLrcTime(int lrcTime) {
this.lrcTime = lrcTime;
}
}
package com.huwei.sweetmusicplayer.models;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import android.util.Log;
import com.huwei.sweetmusicplayer.comparator.LrcComparator;
import com.huwei.sweetmusicplayer.datamanager.MusicManager;
import com.huwei.sweetmusicplayer.util.OnlineLrcUtil;
import com.huwei.sweetmusicplayer.util.TimeUtil;
public class LrcProcess {
private List lrclists;
public LrcProcess() {
super();
lrclists = new ArrayList();
lrclists.clear();
}
public String loadLrc(Song song) {
String path = song.getPath();
StringBuffer stringBuffer = new StringBuffer();
// 得到歌词文件路径
String lrcPathString = path.substring(0, path.lastIndexOf("."))
+ ".lrc";
int index = lrcPathString.lastIndexOf("/");
String parentPath;
String lrcName;
// if(index!=-1){
parentPath = lrcPathString.substring(0, index);
lrcName = lrcPathString.substring(index);
// }
File file = new File(lrcPathString);
// 匹配SweetMusicPlayer/Lyrics
if (!file.exists()) {
file = new File(OnlineLrcUtil.getInstance().getLrcPath(
song.getTitle(), song.getArtist()));
}
Log.i("Path", file.getAbsolutePath().toString());
// 匹配Lyrics
if (!file.exists()) {
file = new File(parentPath + "/../" + "Lyrics/" + lrcName);
}
Log.i("Path", file.getAbsolutePath().toString());
// 匹配lyric
if (!file.exists()) {
file = new File(parentPath + "/../" + "lyric/" + lrcName);
}
Log.i("Path", file.getAbsolutePath().toString());
// 匹配Lyric
if (!file.exists()) {
file = new File(parentPath + "/../" + "Lyric/" + lrcName);
}
Log.i("Path", file.getAbsolutePath().toString());
// 匹配lyrics
if (!file.exists()) {
file = new File(parentPath + "/../" + "lyrics/" + lrcName);
}
Log.i("Path", file.getAbsolutePath().toString());
if (!file.exists()) {
stringBuffer.append(MusicManager.OperateState.READLRCFILE_FAIL);
return stringBuffer.toString();
}
try {
FileInputStream fin = new FileInputStream(file);
InputStreamReader isr = new InputStreamReader(fin, "utf-8");
BufferedReader br = new BufferedReader(isr);
String s;
boolean isLrc = false;
while ((s = br.readLine()) != null) {
// if(isLrc){
s = s.replace("[", ""); // 去掉左边括号
String lrcData[] = s.split("]");
// 这句是歌词
if (lrcData[0].matches("^\\d{2}:\\d{2}.\\d+$")) {
int len = lrcData.length;
int end = lrcData[len - 1].matches("^\\d{2}:\\d{2}.\\d+$") ? len
: len - 1;
for (int i = 0; i < end; i++) {
LrcContent lrcContent = new LrcContent();
int lrcTime = TimeUtil.getLrcMillTime(lrcData[i]);
lrcContent.setLrcTime(lrcTime);
if (lrcData.length == end)
lrcContent.setLrcStr(""); // 空白行
else
lrcContent.setLrcStr(lrcData[len - 1]);
lrclists.add(lrcContent);
}
}
}
// 按时间排序
Collections.sort(lrclists, new LrcComparator());
if (lrclists.size() == 0) {
stringBuffer.append(MusicManager.OperateState.READLRC_LISTNULL);
} else {
stringBuffer.append(MusicManager.OperateState.READLRC_SUCCESS);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
// stringBuffer.append("未找到歌词文件");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
// stringBuffer.append("不支持的编码");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
// stringBuffer.append("IO错误");
}
return stringBuffer.toString();
}
public List getLrclists() {
return lrclists;
}
}
二，歌词解析
先摘取一段歌词ti:安静]
[ar:周杰伦]
[al:范特西]
[by:Midas]
[00:03.16]
[00:04.50]周杰伦-安静
[00:14.50]词:周杰伦 曲:周杰伦 编:钟兴民
[00:25.17]
[02:27.48][00:27.02]只剩下钢琴陪我谈了一天
[02:32.76][00:32.51]睡着的大提琴 安静的旧旧的
[02:39.60][00:38.67]
[02:40.74][00:40.48]我想你已表现的非常明白
[02:46.04][00:45.7]我懂我也知道 你没有舍不得
[02:53.23][00:52.53]
[02:54.04][00:53.76]你说你也会难过我不相信
[03:00.59][01:00.36]牵着你陪着我 也只是曾经
[03:06.63][01:06.24]希望他是真的比我还要爱你
[03:13.29][01:12.96]我才会逼自己离开
每次遍历一行，首先要把“[”替换成" ",去匹配哪些是时间部分，正则匹配“^\\d{2}:\\d{2}.\\d+$”,然后split("]"),得到一个数组data[],最后一个是内容，前面是歌词，遍历数组，装入时间歌词到list。
时间处理：转成毫秒
遍历所有行后，对list按照时间排序。
代码在上面LrcProgress。
三，LrcView控件
分为以下状态：public static String READLRC_SUCCESS="READLRC_SUCCESS";//读取本地歌词成功
public static String READLRC_LISTNULL="READLRC_LISTNULL";//读取歌词list为null
public static String READLRC_ONLINE="READLRC_ONLINE";//正在从网络加载歌词
public static String READLRCFILE_FAIL="READLRCFILE_FAIL";//读取歌词文件失败
public static String READLRCONLINE_FAIL="READLRCONLINE_FAIL";//从网络加载歌词失败
根据不同的状态绘制不同的内容。
LrcView继承自ScrollView，然后再加一层LinearLayout，歌词绘制在TextView上，按照播放时间滚动，就可以保证当前播放的歌词在屏幕中间了。
关于自定义控件，要注意对onMeasure(),onLayout(),onDraw()比较好的理解，有时候遇到onDraw()不能执行，记得加上setWillNotDraw(false)，这里直接继承自ScrollView，就不需要考虑那么多了。
这里需要根据播放时间计算当前播放位置，歌词所在行，然后不同的时候，就去更新歌词界面。
调整歌词进度：
触摸监听时，ACTION_MOVE去绘制歌词进度预览（包括调整到的时间预览），ACTION_UP时调整到对应的进度。
package com.huwei.sweetmusicplayer.ui.widgets;
import java.util.List;
import com.huwei.sweetmusicplayer.datamanager.MusicManager;
import com.huwei.sweetmusicplayer.models.LrcContent;
import com.huwei.sweetmusicplayer.util.TimeUtil;
import android.content.Context;
import android.content.Intent;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver.OnScrollChangedListener;
import android.widget.ScrollView;
import android.widget.TextView;
import android.view.View.OnTouchListener;
public class LrcView extends ScrollView implements OnScrollChangedListener,OnTouchListener{
private float width; //歌词视图宽度
private float height; //歌词视图高度
private Paint currentPaint; //当前画笔对象
private Paint notCurrentPaint; //非当前画笔对象
private final float textHeight=40; //文本高度
private final float textSize=36; //高亮文本大小
private final float notTextSize=30; //非高亮文本大小
private int index; //歌词list集合下标
private String lrcState;
private LrcTextView lrcTextView;
private List lrcLists;
private int scrollY;
private boolean canDrawLine=false;
private int pos=-1; //手指按下后歌词要到的位置
private Paint linePaint;
private boolean canTouchLrc=false; //是否可以触摸并调整歌词
private int count=0; //绘制加载点的次数
private Context mContext;
public LrcView(Context context) {
this(context,null);
// TODO Auto-generated constructor stub
}
public LrcView(Context context, AttributeSet attrs) {
this(context, attrs,0);
// TODO Auto-generated constructor stub
}
public LrcView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
mContext=context;
this.setOnTouchListener(this);
init();
}
public List getLrcLists() {
return lrcLists;
}
public void setLrcLists(List lrcLists) {
this.lrcLists = lrcLists;
//判断歌词界面是否可以触摸
if(lrcLists==null||lrcLists.size()==0) canTouchLrc=false;
else canTouchLrc=true;
//设置index=-1
this.index=-1;
LayoutParams params1=new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
lrcTextView=new LrcTextView(this.getContext());
lrcTextView.setLayoutParams(params1);
this.removeAllViews();
this.addView(lrcTextView);
}
public int getIndex() {
return index;
}
public void setIndex(int index) {
//歌曲位置发生变化,而且手指不是调整歌词位置的状态
if(this.index!=index&&pos==-1){
this.scrollTo(0, (int)(index*textHeight));
}
this.index = index;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
// TODO Auto-generated method stub
super.onSizeChanged(w, h, oldw, oldh);
this.width=w;
this.height=h;
}
public int getIndexByLrcTime(int currentTime){
for(int i=0;i=6) count=0;
canvas.drawText(drawContentStr, width/2, tempY, notCurrentPaint);
handler.sendEmptyMessageDelayed(1, 500);
return;
}else if(MusicManager.OperateState.READLRCONLINE_FAIL.equals(lrcState)){
canvas.drawText("从网络加载歌词失败", width/2, tempY, notCurrentPaint);
return;
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
heightMeasureSpec=(int) (height+textHeight*(lrcLists.size()-1));
setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
}
};
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
if(canDrawLine){
canvas.drawLine(0, scrollY+height/2, width, scrollY+height/2, linePaint);
canvas.drawText(TimeUtil.toTime(lrcLists.get(pos).getLrcTime()), 42, scrollY+height/2-2, linePaint);
}
}
private void init(){
setFocusable(true); //设置该控件可以有焦点
this.setWillNotDraw(false);
//高亮歌词部分
currentPaint=new Paint();
currentPaint.setAntiAlias(true); //设置抗锯齿
currentPaint.setTextAlign(Paint.Align.CENTER); //设置文本居中
//非高亮歌词部分
notCurrentPaint=new Paint();
notCurrentPaint.setAntiAlias(true);
notCurrentPaint.setTextAlign(Paint.Align.CENTER);
//
linePaint=new Paint();
linePaint.setAntiAlias(true);
linePaint.setTextAlign(Paint.Align.CENTER);
//设置画笔颜色
currentPaint.setColor(Color.argb(210, 251, 248, 29));
notCurrentPaint.setColor(Color.argb(140, 255, 255, 255));
linePaint.setColor(Color.RED);
currentPaint.setTextSize(textSize);
currentPaint.setTypeface(Typeface.SERIF);
notCurrentPaint.setTextSize(notTextSize);
notCurrentPaint.setTypeface(Typeface.DEFAULT);
linePaint.setTextSize(textSize);
linePaint.setTypeface(Typeface.SERIF);
}
@Override
public void invalidate() {
// TODO Auto-generated method stub
super.invalidate();
lrcTextView.invalidate();
}
@Override
public void onScrollChanged() {
// TODO Auto-generated method stub
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
//界面不能被触摸
if(!canTouchLrc) return true;
switch(event.getAction()){
case MotionEvent.ACTION_MOVE:
scrollY=this.getScrollY();
pos=(int) (this.getScrollY()/textHeight);
canDrawLine=true;
this.invalidate();
Log.i("LrcView", "ACTION_DOWN");
break;
case MotionEvent.ACTION_UP:
MusicManager.getInstance().setProgress(lrcLists.get(pos).getLrcTime());
canDrawLine=false;
pos=-1;
this.invalidate();
break;
}
return false;
}
private Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
invalidate();
}
};
}
下一篇智能匹配在线歌词： http://blog.csdn.net/huweigoodboy/article/details/39878063