<span style="font-size:14px;">/** * @CreateDate 2015-2-3 * @Author hubiao * @Title 音乐播放器 */public class MediaActivity extends Activity {private MediaPlayer mediaPlayer;//媒体播放器private Button playButton;private Button replayButton ;private boolean isCellPlay;/*在挂断电话的时候，，用于判断是否为是来电时中断*/private boolean isSeekBarChanging;//互斥变量，防止进度条与定时器冲突。private int currentPosition;//当前音乐播放的进度private SeekBar seekBar;private Timer timer;private static final String TAG = "MediaActivity";@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);//实例化媒体播放器mediaPlayer = new MediaPlayer();//监听滚动条事件seekBar = (SeekBar) findViewById(R.id.playSeekBar);seekBar.setOnSeekBarChangeListener(new MySeekBar());// 监听[播放或暂停]事件playButton= (Button) findViewById(R.id.playButton);playButton.setOnClickListener(new PalyListener());//监听[重播]事件replayButton= (Button) findViewById(R.id.replayButton);replayButton.setOnClickListener(new OnClickListener() {public void onClick(View v) {mediaPlayer.reset();currentPosition = 0;play();}});//监听来电事件TelephonyManager phoneyMana = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);phoneyMana.listen(new myPhoneStateListener(),PhoneStateListener.LISTEN_CALL_STATE);}/*销毁时释资源*/@Overrideprotected void onDestroy() {mediaPlayer.release();timer.cancel();timer = null;mediaPlayer = null;super.onDestroy();}/*播放或暂停事件处理*/private class PalyListener implements OnClickListener {public void onClick(View v) {if(playButton.getText().toString().equals("播放")){currentPosition = mediaPlayer.getCurrentPosition();//记录播放的位置mediaPlayer.stop();//暂停状态playButton.setText(R.string.stop);timer.purge();//移除所有任务;}else{mediaPlayer.reset();play();}}}/*播放处理*/private void play() {File media = new File("/mnt/sdcard/files/","bewithyou.mp3");//由于是练习，就把mp3名称固定了Log.i(TAG, media.getAbsolutePath());if(media.exists()){try {mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);//设置音频类型mediaPlayer.setDataSource(media.getAbsolutePath());//设置mp3数据源mediaPlayer.prepareAsync();//数据缓冲/*监听缓存 事件，在缓冲完毕后，开始播放*/mediaPlayer.setOnPreparedListener(new OnPreparedListener() {public void onPrepared(MediaPlayer mp) {mp.start();mp.seekTo(currentPosition);playButton.setText(R.string.play);seekBar.setMax(mediaPlayer.getDuration());}});//监听播放时回调函数timer = new Timer();timer.schedule(new TimerTask() {@Overridepublic 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();}}/*来电事件处理*/private class myPhoneStateListener extends PhoneStateListener{@Overridepublic void onCallStateChanged(int state, String incomingNumber) {switch (state) {case TelephonyManager.CALL_STATE_RINGING://来电，应当停止音乐if(mediaPlayer.isPlaying() && playButton.getText().toString().equals("播放")){currentPosition = mediaPlayer.getCurrentPosition();//记录播放的位置mediaPlayer.stop();isCellPlay = true;//标记这是属于来电时暂停的标记playButton.setText(R.string.stop);timer.purge();//移除定时器任务;}break;case TelephonyManager.CALL_STATE_IDLE://无电话状态if(isCellPlay){isCellPlay = false;mediaPlayer.reset();play();}break;}}}/*进度条处理*/public class MySeekBar implements OnSeekBarChangeListener{public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {}/*滚动时,应当暂停后台定时器*/public void onStartTrackingTouch(SeekBar seekBar) {isSeekBarChanging = true;}/*滑动结束后，重新设置值*/public void onStopTrackingTouch(SeekBar seekBar) {isSeekBarChanging = false;mediaPlayer.seekTo(seekBar.getProgress());}}}</span>|–补充
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