边缓存边播放音乐 带有播放进度条
XML:
Player播放类
MediaPlayer.OnPreparedListener {
public MediaPlayer mediaPlayer; // 媒体播放器
private SeekBar seekBar; // 拖动条
private Timer mTimer = new Timer(); // 计时器
// 初始化播放器
public Player(SeekBar seekBar) {
super();
this.seekBar = seekBar;
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);// 设置媒体流类型
mediaPlayer.setOnBufferingUpdateListener(this);
mediaPlayer.setOnPreparedListener(this);
} catch (Exception e) {
e.printStackTrace();
}
// 每一秒触发一次
mTimer.schedule(timerTask, 0, 1000);
}
// 计时器
TimerTask timerTask = new TimerTask() {
@Override
public void run() {
if (mediaPlayer == null)
return;
if (mediaPlayer.isPlaying() && seekBar.isPressed() == false) {
handler.sendEmptyMessage(0); // 发送消息
}
}
};
Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
int position = mediaPlayer.getCurrentPosition();
int duration = mediaPlayer.getDuration();
if (duration > 0) {
// 计算进度（获取进度条最大刻度*当前音乐播放位置 / 当前音乐时长）
long pos = seekBar.getMax() * position / duration;
seekBar.setProgress((int) pos);
}
};
};
public void play() {
mediaPlayer.start();
}
/**
*
* @param url
* url地址
*/
public void playUrl(String url) {
try {
mediaPlayer.reset();
mediaPlayer.setDataSource(url); // 设置数据源
mediaPlayer.prepare(); // prepare自动播放
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
// 暂停
public void pause() {
mediaPlayer.pause();
}
// 停止
public void stop() {
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
}
@Override
public void onPrepared(MediaPlayer mp) {
mp.start();
Log.e("mediaPlayer", "onPrepared");
}
@Override
public void onCompletion(MediaPlayer mp) {
Log.e("mediaPlayer", "onCompletion");
}
/**
* 缓冲更新
*/
@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
seekBar.setSecondaryProgress(percent);
int currentProgress = seekBar.getMax()
* mediaPlayer.getCurrentPosition() / mediaPlayer.getDuration();
Log.e(currentProgress + "% play", percent + " buffer");
}
}