歌詞是播放器類App必不可少的組件,而一般的歌詞組件都需要做到歌詞的顯示與播放進度同步。我們知道,歌詞是如下所示的文件:
lrc
[ti:原來愛情這么傷]
[ar:梁詠琪]
[al:給自己的情歌]
[00:00.55]梁詠琪 - 原來愛情這么傷
[00:05.43]作詞:彭學斌
[00:06.68]作曲:彭學斌
[00:09.63]
[00:22.27]我睜開眼睛 卻感覺不到天亮
[00:29.74]東西吃一半 莫名其妙哭一場
[00:37.06]我忍住不想 時間變得更漫長
[00:44.09]也與你有關 否則又開始胡思亂想
[00:53.81]我日月無光 忙得不知所以然
[00:59.96]找朋友交談 其實全幫不上忙
[01:07.49]以為會習慣 有你在才是習慣
[01:14.62]你曾住在我心上 現在空了一個地方
[01:21.89]原來愛情這么傷 比想象中還難
[01:29.90]淚水總是不聽話 幸福躲起來不聲不響
[01:37.43]太多道理太牽強 道理全是一樣
[01:44.34]說的時候很簡單 愛上后卻正巧打亂
[02:00.00]我日月無光 忙得不知所以然
[02:07.41]找朋友交談 其實全幫不上忙
[02:15.07]以為會習慣 有你在才是習慣
[02:21.88]你曾住在我心上 現在空了一個地方
[02:29.38]原來愛情這么傷 比想象中還難
[02:36.60]淚水總是不聽話 幸福躲起來不聲不響
[02:44.22]太多道理太牽強 道理全是一樣
[02:50.78]說的時候很簡單 愛上后卻正巧打亂
[03:00.32]只想變的堅強 強到能夠去忘
[03:07.29]無所謂悲傷 只要學會抵抗
[03:14.19]原來愛情這么傷
[03:20.78]原來愛情是這樣 這樣峰回路轉
[03:28.12]淚水明明流不干 瞎了眼還要再愛一趟
[03:35.83]有一天終於打完 思念的一場戰
[03:43.45]回過頭再看一看 原來愛情那么傷
[03:54.76]下次還會不會這樣
[88:88.88]
[ar:梁詠琪]
[al:給自己的情歌]
[00:00.55]梁詠琪 - 原來愛情這么傷
[00:05.43]作詞:彭學斌
[00:06.68]作曲:彭學斌
[00:09.63]
[00:22.27]我睜開眼睛 卻感覺不到天亮
[00:29.74]東西吃一半 莫名其妙哭一場
[00:37.06]我忍住不想 時間變得更漫長
[00:44.09]也與你有關 否則又開始胡思亂想
[00:53.81]我日月無光 忙得不知所以然
[00:59.96]找朋友交談 其實全幫不上忙
[01:07.49]以為會習慣 有你在才是習慣
[01:14.62]你曾住在我心上 現在空了一個地方
[01:21.89]原來愛情這么傷 比想象中還難
[01:29.90]淚水總是不聽話 幸福躲起來不聲不響
[01:37.43]太多道理太牽強 道理全是一樣
[01:44.34]說的時候很簡單 愛上后卻正巧打亂
[02:00.00]我日月無光 忙得不知所以然
[02:07.41]找朋友交談 其實全幫不上忙
[02:15.07]以為會習慣 有你在才是習慣
[02:21.88]你曾住在我心上 現在空了一個地方
[02:29.38]原來愛情這么傷 比想象中還難
[02:36.60]淚水總是不聽話 幸福躲起來不聲不響
[02:44.22]太多道理太牽強 道理全是一樣
[02:50.78]說的時候很簡單 愛上后卻正巧打亂
[03:00.32]只想變的堅強 強到能夠去忘
[03:07.29]無所謂悲傷 只要學會抵抗
[03:14.19]原來愛情這么傷
[03:20.78]原來愛情是這樣 這樣峰回路轉
[03:28.12]淚水明明流不干 瞎了眼還要再愛一趟
[03:35.83]有一天終於打完 思念的一場戰
[03:43.45]回過頭再看一看 原來愛情那么傷
[03:54.76]下次還會不會這樣
[88:88.88]
我們需要讀取以上歌詞文件的每一行轉換成成一個個歌詞實體:
- package com.music.lyricsync;
- public class LyricObject {
- public int begintime; // 開始時間
- public int endtime; // 結束時間
- public int timeline; // 單句歌詞用時
- public String lrc; // 單句歌詞
- }
可根據當前播放器的播放進度與每句歌詞的開始時間,得到當前屏幕中央高亮顯示的那句歌詞。在UI線程中另起線程,通過回調函數 onDraw() 每隔100ms重新繪制屏幕,實現歌詞平滑滾動的動畫效果。MainActivity代碼如下:
- package com.music.lyricsync;
- import java.io.IOException;
- import android.app.Activity;
- import android.media.MediaPlayer;
- import android.net.Uri;
- import android.os.Bundle;
- import android.os.Environment;
- import android.os.Handler;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.Button;
- import android.widget.SeekBar;
- import android.widget.SeekBar.OnSeekBarChangeListener;
- public class MainActivity extends Activity {
- /** Called when the activity is first created. */
- private LyricView lyricView;
- private MediaPlayer mediaPlayer;
- private Button button;
- private SeekBar seekBar;
- private String mp3Path;
- private int INTERVAL=45;//歌詞每行的間隔
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- // this.requestWindowFeature(Window.FEATURE_NO_TITLE);
- // getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
- setContentView(R.layout.main);
- mp3Path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/LyricSync/1.mp3";
- lyricView = (LyricView) findViewById(R.id.mylrc);
- mediaPlayer = new MediaPlayer();
- // this.requestWindowFeature(Window.FEATURE_NO_TITLE);
- ResetMusic(mp3Path);
- SerchLrc();
- lyricView.SetTextSize();
- button = (Button) findViewById(R.id.button);
- button.setText("播放");
- seekBar = (SeekBar) findViewById(R.id.seekbarmusic);
- seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
- @Override
- public void onStopTrackingTouch(SeekBar seekBar) {
- // TODO Auto-generated method stub
- }
- @Override
- public void onStartTrackingTouch(SeekBar seekBar) {
- // TODO Auto-generated method stub
- }
- @Override
- public void onProgressChanged(SeekBar seekBar, int progress,
- boolean fromUser) {
- // TODO Auto-generated method stub
- if (fromUser) {
- mediaPlayer.seekTo(progress);
- lyricView.setOffsetY(220 - lyricView.SelectIndex(progress)
- * (lyricView.getSIZEWORD() + INTERVAL-1));
- }
- }
- });
- button.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- // TODO Auto-generated method stub
- if (mediaPlayer.isPlaying()) {
- button.setText("播放");
- mediaPlayer.pause();
- } else {
- button.setText("暫停");
- mediaPlayer.start();
- lyricView.setOffsetY(220 - lyricView.SelectIndex(mediaPlayer.getCurrentPosition())
- * (lyricView.getSIZEWORD() + INTERVAL-1));
- }
- }
- });
- mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
- @Override
- public void onCompletion(MediaPlayer mp) {
- ResetMusic(mp3Path);
- lyricView.SetTextSize();
- lyricView.setOffsetY(200);
- mediaPlayer.start();
- }
- });
- seekBar.setMax(mediaPlayer.getDuration());
- new Thread(new runable()).start();
- }
- public void SerchLrc() {
- String lrc = mp3Path;
- lrc = lrc.substring(0, lrc.length() - 4).trim() + ".lrc".trim();
- LyricView.read(lrc);
- lyricView.SetTextSize();
- lyricView.setOffsetY(350);
- }
- public void ResetMusic(String path) {
- mediaPlayer.reset();
- try {
- mediaPlayer.setDataSource(mp3Path);
- mediaPlayer.prepare();
- } catch (IllegalArgumentException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } catch (IllegalStateException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- class runable implements Runnable {
- @Override
- public void run() {
- // TODO Auto-generated method stub
- while (true) {
- try {
- Thread.sleep(100);
- if (mediaPlayer.isPlaying()) {
- lyricView.setOffsetY(lyricView.getOffsetY() - lyricView.SpeedLrc());
- lyricView.SelectIndex(mediaPlayer.getCurrentPosition());
- seekBar.setProgress(mediaPlayer.getCurrentPosition());
- mHandler.post(mUpdateResults);
- }
- } catch (InterruptedException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }
- }
- Handler mHandler = new Handler();
- Runnable mUpdateResults = new Runnable() {
- public void run() {
- lyricView.invalidate(); // 更新視圖
- }
- };
- }
歌詞View的代碼如下:
- package com.music.lyricsync;
- 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.util.Iterator;
- import java.util.TreeMap;
- import java.util.regex.Matcher;
- import java.util.regex.Pattern;
- import android.content.Context;
- import android.graphics.Canvas;
- import android.graphics.Color;
- import android.graphics.Paint;
- import android.util.AttributeSet;
- import android.util.Log;
- import android.view.MotionEvent;
- import android.view.View;
- public class LyricView extends View{
- private static TreeMap<Integer, LyricObject> lrc_map;
- private float mX; //屏幕X軸的中點,此值固定,保持歌詞在X中間顯示
- private float offsetY; //歌詞在Y軸上的偏移量,此值會根據歌詞的滾動變小
- private static boolean blLrc=false;
- private float touchY; //當觸摸歌詞View時,保存為當前觸點的Y軸坐標
- private float touchX;
- private boolean blScrollView=false;
- private int lrcIndex=0; //保存歌詞TreeMap的下標
- private int SIZEWORD=0;//顯示歌詞文字的大小值
- private int INTERVAL=45;//歌詞每行的間隔
- Paint paint=new Paint();//畫筆,用於畫不是高亮的歌詞
- Paint paintHL=new Paint(); //畫筆,用於畫高亮的歌詞,即當前唱到這句歌詞
- public LyricView(Context context){
- super(context);
- init();
- }
- public LyricView(Context context, AttributeSet attrs) {
- super(context, attrs);
- init();
- }
- /* (non-Javadoc)
- * @see android.view.View#onDraw(android.graphics.Canvas)
- */
- @Override
- protected void onDraw(Canvas canvas) {
- if(blLrc){
- paintHL.setTextSize(SIZEWORD);
- paint.setTextSize(SIZEWORD);
- LyricObject temp=lrc_map.get(lrcIndex);
- canvas.drawText(temp.lrc, mX, offsetY+(SIZEWORD+INTERVAL)*lrcIndex, paintHL);
- // 畫當前歌詞之前的歌詞
- for(int i=lrcIndex-1;i>=0;i--){
- temp=lrc_map.get(i);
- if(offsetY+(SIZEWORD+INTERVAL)*i<0){
- break;
- }
- canvas.drawText(temp.lrc, mX, offsetY+(SIZEWORD+INTERVAL)*i, paint);
- }
- // 畫當前歌詞之后的歌詞
- for(int i=lrcIndex+1;i<lrc_map.size();i++){
- temp=lrc_map.get(i);
- if(offsetY+(SIZEWORD+INTERVAL)*i>600){
- break;
- }
- canvas.drawText(temp.lrc, mX, offsetY+(SIZEWORD+INTERVAL)*i, paint);
- }
- }
- else{
- paint.setTextSize(25);
- canvas.drawText("找不到歌詞", mX, 310, paint);
- }
- super.onDraw(canvas);
- }
- /* (non-Javadoc)
- * @see android.view.View#onTouchEvent(android.view.MotionEvent)
- */
- @Override
- public boolean onTouchEvent(MotionEvent event) {
- // TODO Auto-generated method stub
- System.out.println("bllll==="+blScrollView);
- float tt=event.getY();
- if(!blLrc){
- //return super.onTouchEvent(event);
- return super.onTouchEvent(event);
- }
- switch(event.getAction()){
- case MotionEvent.ACTION_DOWN:
- touchX=event.getX();
- break;
- case MotionEvent.ACTION_MOVE:
- touchY=tt-touchY;
- offsetY=offsetY+touchY;
- break;
- case MotionEvent.ACTION_UP:
- blScrollView=false;
- break;
- }
- touchY=tt;
- return true;
- }
- public void init(){
- lrc_map = new TreeMap<Integer, LyricObject>();
- offsetY=320;
- paint=new Paint();
- paint.setTextAlign(Paint.Align.CENTER);
- paint.setColor(Color.GREEN);
- paint.setAntiAlias(true);
- paint.setDither(true);
- paint.setAlpha(180);
- paintHL=new Paint();
- paintHL.setTextAlign(Paint.Align.CENTER);
- paintHL.setColor(Color.RED);
- paintHL.setAntiAlias(true);
- paintHL.setAlpha(255);
- }
- /**
- * 根據歌詞里面最長的那句來確定歌詞字體的大小
- */
- public void SetTextSize(){
- if(!blLrc){
- return;
- }
- int max=lrc_map.get(0).lrc.length();
- for(int i=1;i<lrc_map.size();i++){
- LyricObject lrcStrLength=lrc_map.get(i);
- if(max<lrcStrLength.lrc.length()){
- max=lrcStrLength.lrc.length();
- }
- }
- SIZEWORD=320/max;
- }
- protected void onSizeChanged(int w, int h, int oldw, int oldh) {
- mX = w * 0.5f;
- super.onSizeChanged(w, h, oldw, oldh);
- }
- /**
- * 歌詞滾動的速度
- *
- * @return 返回歌詞滾動的速度
- */
- public Float SpeedLrc(){
- float speed=0;
- if(offsetY+(SIZEWORD+INTERVAL)*lrcIndex>220){
- speed=((offsetY+(SIZEWORD+INTERVAL)*lrcIndex-220)/20);
- } else if(offsetY+(SIZEWORD+INTERVAL)*lrcIndex < 120){
- Log.i("speed", "speed is too fast!!!");
- speed = 0;
- }
- // if(speed<0.2){
- // speed=0.2f;
- // }
- return speed;
- }
- /**
- * 按當前的歌曲的播放時間,從歌詞里面獲得那一句
- * @param time 當前歌曲的播放時間
- * @return 返回當前歌詞的索引值
- */
- public int SelectIndex(int time){
- if(!blLrc){
- return 0;
- }
- int index=0;
- for(int i=0;i<lrc_map.size();i++){
- LyricObject temp=lrc_map.get(i);
- if(temp.begintime<time){
- ++index;
- }
- }
- lrcIndex=index-1;
- if(lrcIndex<0){
- lrcIndex=0;
- }
- return lrcIndex;
- }
- /**
- * 讀取歌詞文件
- * @param file 歌詞的路徑
- *
- */
- public static void read(String file) {
- TreeMap<Integer, LyricObject> lrc_read =new TreeMap<Integer, LyricObject>();
- String data = "";
- try {
- File saveFile=new File(file);
- // System.out.println("是否有歌詞文件"+saveFile.isFile());
- if(!saveFile.isFile()){
- blLrc=false;
- return;
- }
- blLrc=true;
- //System.out.println("bllrc==="+blLrc);
- FileInputStream stream = new FileInputStream(saveFile);// context.openFileInput(file);
- BufferedReader br = new BufferedReader(new InputStreamReader(stream,"GB2312"));
- int i = 0;
- Pattern pattern = Pattern.compile("\\d{2}");
- while ((data = br.readLine()) != null) {
- // System.out.println("++++++++++++>>"+data);
- data = data.replace("[","");//將前面的替換成后面的
- data = data.replace("]","@");
- String splitdata[] =data.split("@");//分隔
- if(data.endsWith("@")){
- for(int k=0;k<splitdata.length;k++){
- String str=splitdata[k];
- str = str.replace(":",".");
- str = str.replace(".","@");
- String timedata[] =str.split("@");
- Matcher matcher = pattern.matcher(timedata[0]);
- if(timedata.length==3 && matcher.matches()){
- int m = Integer.parseInt(timedata[0]); //分
- int s = Integer.parseInt(timedata[1]); //秒
- int ms = Integer.parseInt(timedata[2]); //毫秒
- int currTime = (m*60+s)*1000+ms*10;
- LyricObject item1= new LyricObject();
- item1.begintime = currTime;
- item1.lrc = "";
- lrc_read.put(currTime,item1);
- }
- }
- }
- else{
- String lrcContenet = splitdata[splitdata.length-1];
- for (int j=0;j<splitdata.length-1;j++)
- {
- String tmpstr = splitdata[j];
- tmpstr = tmpstr.replace(":",".");
- tmpstr = tmpstr.replace(".","@");
- String timedata[] =tmpstr.split("@");
- Matcher matcher = pattern.matcher(timedata[0]);
- if(timedata.length==3 && matcher.matches()){
- int m = Integer.parseInt(timedata[0]); //分
- int s = Integer.parseInt(timedata[1]); //秒
- int ms = Integer.parseInt(timedata[2]); //毫秒
- int currTime = (m*60+s)*1000+ms*10;
- LyricObject item1= new LyricObject();
- item1.begintime = currTime;
- item1.lrc = lrcContenet;
- lrc_read.put(currTime,item1);// 將currTime當標簽 item1當數據 插入TreeMap里
- i++;
- }
- }
- }
- }
- stream.close();
- }
- catch (FileNotFoundException e) {
- }
- catch (IOException e) {
- }
- /*
- * 遍歷hashmap 計算每句歌詞所需要的時間
- */
- lrc_map.clear();
- data ="";
- Iterator<Integer> iterator = lrc_read.keySet().iterator();
- LyricObject oldval = null;
- int i =0;
- while(iterator.hasNext()) {
- Object ob =iterator.next();
- LyricObject val = (LyricObject)lrc_read.get(ob);
- if (oldval==null)
- oldval = val;
- else
- {
- LyricObject item1= new LyricObject();
- item1 = oldval;
- item1.timeline = val.begintime-oldval.begintime;
- lrc_map.put(new Integer(i), item1);
- i++;
- oldval = val;
- }
- if (!iterator.hasNext()) {
- lrc_map.put(new Integer(i), val);
- }
- }
- }
- /**
- * @return the blLrc
- */
- public static boolean isBlLrc() {
- return blLrc;
- }
- /**
- * @return the offsetY
- */
- public float getOffsetY() {
- return offsetY;
- }
- /**
- * @param offsetY the offsetY to set
- */
- public void setOffsetY(float offsetY) {
- this.offsetY = offsetY;
- }
- /**
- * @return 返回歌詞文字的大小
- */
- public int getSIZEWORD() {
- return SIZEWORD;
- }
- /**
- * 設置歌詞文字的大小
- * @param sIZEWORD the sIZEWORD to set
- */
- public void setSIZEWORD(int sIZEWORD) {
- SIZEWORD = sIZEWORD;
- }
- }
xml布局文件如下:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:background="#FFFFFF" >
- <com.music.lyricsync.LyricView
- android:id="@+id/mylrc"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:layout_marginBottom="50dip"
- android:layout_marginTop="50dip" />
- <LinearLayout
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentBottom="true"
- android:orientation="horizontal" >
- <Button
- android:id="@+id/button"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content" />
- <SeekBar
- android:id="@+id/seekbarmusic"
- android:layout_width="205px"
- android:layout_height="wrap_content"
- android:layout_gravity="center_vertical"
- android:layout_marginBottom="5px"
- android:progress="0" />
- </LinearLayout>
- </RelativeLayout>
程序運行后如下圖所示:
運行程序前,先在SDCard根目錄下新建LyricSync目錄,將 歌曲和歌詞.zip 中的 1.mp3 和 1.lrc 文件解壓放入LyricSync目錄下即可。