Android(安卓)音乐播放器实现歌词显示

LrcHandle.java：

package com.example.welcome;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.ArrayList;import java.util.List;import java.util.regex.Matcher;import java.util.regex.Pattern;/*** * 获取时间以及对应的歌词 *  * @author chao *  */public class LrcHandle {private List<String> mWords = new ArrayList<String>();private List<Integer> mTimeList = new ArrayList<Integer>();// 处理歌词文件public void readLRC(String path) {File file = new File(path);try {FileInputStream fileInputStream = new FileInputStream(file);InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "GBK");BufferedReader bufferedReader = new BufferedReader(inputStreamReader);String s = "";while ((s = bufferedReader.readLine()) != null) {addTimeToList(s);if ((s.indexOf("[ar:") != -1) || (s.indexOf("[ti:") != -1)|| (s.indexOf("[by:") != -1)) {s = s.substring(s.indexOf(":") + 1, s.indexOf("]"));} else {// ss为时间 [02:12.22]String ss = s.substring(s.indexOf("["), s.indexOf("]") + 1);// s为ss时间后的歌词s = s.replace(ss, "");}mWords.add(s);}bufferedReader.close();inputStreamReader.close();fileInputStream.close();} catch (FileNotFoundException e) {e.printStackTrace();mWords.add("没有歌词文件，赶紧去下载");} catch (IOException e) {e.printStackTrace();mWords.add("没有读取到歌词");}}public List<String> getWords() {return mWords;}public List<Integer> getTime() {return mTimeList;}// 分离出时间private int timeHandler(String string) {string = string.replace(".", ":");String timeData[] = string.split(":");// 分离出分、秒并转换为整型int minute = Integer.parseInt(timeData[0]);int second = Integer.parseInt(timeData[1]);int millisecond = Integer.parseInt(timeData[2]);// 计算上一行与下一行的时间转换为毫秒数int currentTime = (minute * 60 + second) * 1000 + millisecond * 10;return currentTime;}private void addTimeToList(String string) {Matcher matcher = Pattern.compile("\\[\\d{1,2}:\\d{1,2}([\\.:]\\d{1,2})?\\]").matcher(string);if (matcher.find()) {String str = matcher.group();mTimeList.add(new LrcHandle().timeHandler(str.substring(1,str.length() - 1)));}}}

WordView.java:

package com.example.welcome;import java.io.IOException;import java.util.ArrayList;import java.util.List;import android.annotation.SuppressLint;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Typeface;import android.util.AttributeSet;import android.widget.TextView;public class WordView extends TextView {private List mWordsList = new ArrayList();private Paint mLoseFocusPaint;private Paint mOnFocusePaint;private float mX = 0;private float mMiddleY = 0;private float mY = 0;private static final int DY = 50;private int mIndex = 0;public WordView(Context context) throws IOException {super(context);init();}public WordView(Context context, AttributeSet attrs) throws IOException {super(context, attrs);init();}public WordView(Context context, AttributeSet attrs, int defStyle)throws IOException {super(context, attrs, defStyle);init();}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);canvas.drawColor(Color.BLACK);Paint p = mLoseFocusPaint;p.setTextAlign(Paint.Align.CENTER);Paint p2 = mOnFocusePaint;p2.setTextAlign(Paint.Align.CENTER);canvas.drawText((String) mWordsList.get(mIndex), mX, mMiddleY, p2);int alphaValue = 25;float tempY = mMiddleY;for (int i = mIndex - 1; i >= 0; i--) {tempY -= DY;if (tempY < 0) {break;}p.setColor(Color.argb(255 - alphaValue, 245, 245, 245));canvas.drawText((String) mWordsList.get(i), mX, tempY, p);alphaValue += 25;}alphaValue = 25;tempY = mMiddleY;for (int i = mIndex + 1, len = mWordsList.size(); i < len; i++) {tempY += DY;if (tempY > mY) {break;}p.setColor(Color.argb(255 - alphaValue, 245, 245, 245));canvas.drawText((String) mWordsList.get(i), mX, tempY, p);alphaValue += 25;}mIndex++;}@Overrideprotected void onSizeChanged(int w, int h, int ow, int oh) {super.onSizeChanged(w, h, ow, oh);mX = w * 0.5f;mY = h;mMiddleY = h * 0.3f;}@SuppressLint("SdCardPath")private void init() throws IOException {setFocusable(true);LrcHandle lrcHandler = new LrcHandle();lrcHandler.readLRC("/sdcard/aa.lrc");mWordsList = lrcHandler.getWords();mLoseFocusPaint = new Paint();mLoseFocusPaint.setAntiAlias(true);mLoseFocusPaint.setTextSize(22);mLoseFocusPaint.setColor(Color.WHITE);mLoseFocusPaint.setTypeface(Typeface.MONOSPACE);mOnFocusePaint = new Paint();mOnFocusePaint.setAntiAlias(true);mOnFocusePaint.setColor(Color.YELLOW);mOnFocusePaint.setTextSize(40);mOnFocusePaint.setTypeface(Typeface.SANS_SERIF);}}

MainActivity.java:

package com.example.welcome;import java.io.IOException;import java.util.List;import android.R.integer;import android.annotation.SuppressLint;import android.app.Activity;import android.media.MediaPlayer;import android.os.Bundle;import android.os.Handler;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {private WordView mWordView;private List mTimeList;private MediaPlayer mPlayer;@SuppressLint("SdCardPath")@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);Button button = (Button) findViewById(R.id.button);button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {mPlayer.stop();finish();}});mWordView = (WordView) findViewById(R.id.text);mPlayer = new MediaPlayer();mPlayer.reset();LrcHandle lrcHandler = new LrcHandle();try {lrcHandler.readLRC("/sdcard/aa.lrc");mTimeList = lrcHandler.getTime();mPlayer.setDataSource("/sdcard/e.mp3");mPlayer.prepare();} catch (IOException e) {e.printStackTrace();} catch (IllegalArgumentException e) {e.printStackTrace();} catch (SecurityException e) {e.printStackTrace();} catch (IllegalStateException e) {e.printStackTrace();}final Handler handler = new Handler();mPlayer.start();new Thread(new Runnable() {int i = 0;@Overridepublic void run() {while (mPlayer.isPlaying()) {handler.post(new Runnable() {@Overridepublic void run() {mWordView.invalidate();}});try {Thread.sleep(Integer.parseInt(mTimeList.get(i + 1).toString())- Integer.parseInt(mTimeList.get(i).toString()));} catch (InterruptedException e) {}i++;if (i == mTimeList.size() - 1) {mPlayer.stop();break;}}}}).start();}}

main.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" >    <Button        android:id="@+id/button"        android:layout_width="60dip"        android:layout_height="60dip"        android:text="stop" />    <com.example.welcome.WordView        android:id="@+id/text"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_below="@id/button"        android:text="song" /></RelativeLayout>

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