Android--MediaPlayer音乐播放器歌词随时间高亮显示

package com.mrzhu.hightlight;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.text.Spannable;import android.text.SpannableStringBuilder;import android.text.style.ForegroundColorSpan;import android.widget.TextView;public class LRCHighLightActivity extends Activity {protected static final int SHOWHIGH = 0;private TextView tvShowLrcHighLight;private int start = 0;private int end = 1;private boolean flag = true;private String content = "爱你变习惯不再稀罕\n" +"我们该冷静谈一谈\n" +"你说你喜欢一点点浪漫\n" +"却把跟随我的脚步放慢\n" +"没有你分享分担\n" +"我的快乐悲伤\n" +"心情天天天天纷乱\n" +"我一再试探\n" +"你一再隐瞒\n" +"是谁改变爱情原来的模样\n" +"有一种预感爱就要离岸\n" +"所有回忆却慢慢碎成片断\n" +"不能尽欢爱总是苦短\n" +"我只想要你最后的答案\n" +"有一种预感想挽回太难\n" +"对你还有无可救药的期盼\n" +"我坐立难安望眼欲穿\n" +"我会永远守在灯火阑珊的地方";    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        tvShowLrcHighLight = (TextView) findViewById(R.id.tvLRCHighLight);        new Thread(new Runnable(){public void run() {while(flag){try {if(end < content.length()){start++;end++;Bundle b = new Bundle();b.putInt("start", start);b.putInt("end", end);Message msg = handler.obtainMessage(SHOWHIGH, b);handler.sendMessage(msg);}else{flag = false;}Thread.sleep(500);} catch (InterruptedException e) {e.printStackTrace();}}}                }).start();    }        private Handler handler = new Handler(){    public void handleMessage(android.os.Message msg) {    switch(msg.what){    case SHOWHIGH:    Bundle b = (Bundle) msg.obj;    int start = b.getInt("start");    int end = b.getInt("end");    SpannableStringBuilder ssb = new SpannableStringBuilder(content);    ssb.setSpan(new ForegroundColorSpan(Color.YELLOW), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);    tvShowLrcHighLight.setText(ssb);    break;    }    };    }; }

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/tvLRCHighLight"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_weight="0.24"        android:gravity="center"        android:text="@string/hello"        android:textSize="20sp" /></LinearLayout>