<TextView 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" 
 android:text="@string/hello" /> 
 
 <EditText 
 android:id="@+id/mediaFileName" 
 android:layout_width="match_parent" 
 android:text="gangstabop.mp3" 
 android:layout_height="wrap_content" > 
 <requestFocus /> 
 </EditText> 
 
 
 <LinearLayout 
 android:id="@+id/linearButton" 
 android:layout_width="match_parent" 
 android:layout_height="wrap_content" > 
 
 <Button 
 android:id="@+id/playButton" 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content" 
 android:text="@string/stop" /> 
 
 <SeekBar 
 android:id="@+id/playSeekBar" 
 android:layout_width="140px" 
 android:layout_height="wrap_content" 
 android:layout_marginLeft="3px" 
 android:layout_marginTop="5px" /> 
 
 <Button 
 android:id="@+id/replayButton" 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content" 
 android:layout_marginLeft="3px" 
 android:text="@string/replay" /> 
 </LinearLayout>

/** 
 * @CreateDate 2015-2-3 
 * @Author hubiao 
 * @Title 音樂播放器 
 */ 
public class MediaActivity extends Activity { 
 private MediaPlayer mediaPlayer;//媒體播放器 
 private Button playButton; 
 private Button replayButton ; 
 private boolean isCellPlay;/*在掛斷電話的時(shí)候，用于判斷是否為是來電時(shí)中斷*/ 
 private boolean isSeekBarChanging;//互斥變量，防止進(jìn)度條與定時(shí)器沖突。 
 private int currentPosition;//當(dāng)前音樂播放的進(jìn)度 
 private SeekBar seekBar; 
 private Timer timer; 
 
 private static final String TAG = "MediaActivity"; 
 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.main); 
 
 //實(shí)例化媒體播放器 
 mediaPlayer = new MediaPlayer(); 
 
 //監(jiān)聽滾動(dòng)條事件 
 seekBar = (SeekBar) findViewById(R.id.playSeekBar); 
 seekBar.setOnSeekBarChangeListener(new MySeekBar()); 
 
 // 監(jiān)聽[播放或暫停]事件 
 playButton= (Button) findViewById(R.id.playButton); 
 playButton.setOnClickListener(new PalyListener()); 
 
 //監(jiān)聽[重播]事件 
 replayButton= (Button) findViewById(R.id.replayButton); 
 replayButton.setOnClickListener(new OnClickListener() { 
 public void onClick(View v) { 
 mediaPlayer.reset(); 
 currentPosition = 0; 
 play(); 
 } 
 }); 
 
 //監(jiān)聽來電事件 
 TelephonyManager phoneyMana = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); 
 phoneyMana.listen(new myPhoneStateListener(),PhoneStateListener.LISTEN_CALL_STATE); 
 } 
 /*銷毀時(shí)釋資源*/ 
 @Override 
 protected void onDestroy() { 
 mediaPlayer.release(); 
 timer.cancel(); 
 timer = null; 
 mediaPlayer = null; 
 super.onDestroy(); 
 } 
 
 /*播放或暫停事件處理*/ 
 private class PalyListener implements OnClickListener { 
 public void onClick(View v) { 
 if(playButton.getText().toString().equals("播放")) 
 { 
 currentPosition = mediaPlayer.getCurrentPosition();//記錄播放的位置 
 mediaPlayer.stop();//暫停狀態(tài) 
 playButton.setText(R.string.stop); 
 timer.purge();//移除所有任務(wù); 
 } 
 else{ 
 mediaPlayer.reset(); 
 play(); 
 } 
 } 
 } 
 
 /*播放處理*/ 
 private void play() { 
 File media = new File("/mnt/sdcard/files/","bewithyou.mp3");//由于是練習(xí)，就把mp3名稱固定了 
 Log.i(TAG, media.getAbsolutePath()); 
 if(media.exists()) 
 { 
 try { 
 mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);//設(shè)置音頻類型 
 mediaPlayer.setDataSource(media.getAbsolutePath());//設(shè)置mp3數(shù)據(jù)源 
 mediaPlayer.prepareAsync();//數(shù)據(jù)緩沖 
 /*監(jiān)聽緩存 事件，在緩沖完畢后，開始播放*/ 
 mediaPlayer.setOnPreparedListener(new OnPreparedListener() { 
  public void onPrepared(MediaPlayer mp) { 
  mp.start(); 
  mp.seekTo(currentPosition); 
  playButton.setText(R.string.play); 
  seekBar.setMax(mediaPlayer.getDuration()); 
  } 
 }); 
 //監(jiān)聽播放時(shí)回調(diào)函數(shù) 
 timer = new Timer(); 
 timer.schedule(new TimerTask() { 
  @Override 
  public void run() { 
  if(!isSeekBarChanging){ 
  seekBar.setProgress(mediaPlayer.getCurrentPosition()); 
  } 
  } 
 },0,50); 
 } catch (Exception e) { 
 Toast.makeText(getApplicationContext(), R.string.playError, Toast.LENGTH_LONG).show(); 
 e.printStackTrace(); 
 System.out.println(e); 
 } 
 } 
 else{ 
 Toast.makeText(getApplicationContext(), R.string.fileError, Toast.LENGTH_LONG).show(); 
 } 
 } 
 
 /*來電事件處理*/ 
 private class myPhoneStateListener extends PhoneStateListener 
 { 
 @Override 
 public void onCallStateChanged(int state, String incomingNumber) { 
 switch (state) { 
 case TelephonyManager.CALL_STATE_RINGING://來電，應(yīng)當(dāng)停止音樂 
 if(mediaPlayer.isPlaying() && playButton.getText().toString().equals("播放")){ 
  currentPosition = mediaPlayer.getCurrentPosition();//記錄播放的位置 
  mediaPlayer.stop(); 
  isCellPlay = true;//標(biāo)記這是屬于來電時(shí)暫停的標(biāo)記 
  playButton.setText(R.string.stop); 
  timer.purge();//移除定時(shí)器任務(wù); 
 } 
 break; 
 case TelephonyManager.CALL_STATE_IDLE://無電話狀態(tài) 
 if(isCellPlay){ 
  isCellPlay = false; 
  mediaPlayer.reset(); 
  play(); 
 } 
 break; 
 } 
 } 
 } 
 
 /*進(jìn)度條處理*/ 
 public class MySeekBar implements OnSeekBarChangeListener{ 
 
 public void onProgressChanged(SeekBar seekBar, int progress, 
 boolean fromUser) { 
 } 
 
 /*滾動(dòng)時(shí),應(yīng)當(dāng)暫停后臺(tái)定時(shí)器*/ 
 public void onStartTrackingTouch(SeekBar seekBar) { 
 isSeekBarChanging = true; 
 } 
 /*滑動(dòng)結(jié)束后，重新設(shè)置值*/ 
 public void onStopTrackingTouch(SeekBar seekBar) { 
 isSeekBarChanging = false; 
 mediaPlayer.seekTo(seekBar.getProgress()); 
 } 
 } 
} 

<!-- 申請(qǐng)SD卡寫入權(quán)限 --> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<!--申請(qǐng)SD卡創(chuàng)建與權(quán)限 --> 
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /> 
<!-- 攔截號(hào)碼權(quán)限 --> 
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>