当我点击播放按钮来播放一首歌曲并将歌曲mp3与之捆绑，在onStartCommand中接收它时，我的服务开始运行。问题在于当启动服务的活动结束时，我的服务会再次调用onStartCommand。当它尝试接收那个捆绑包时，因为这次活动没有启动它，所以它不在那里。由于这个原因，当准备我的媒体播放器时，我遇到了一个非法状态异常。我没有绑定我的服务。
为什么我的活动结束时会调用onStartCommand？
启动服务：
服务类：
为什么我的活动结束时会调用onStartCommand？
启动服务：
Intent i = new Intent(SongList.this,MyService.class);
i.putExtra("songURL", user.songurlz);
i.putExtra("songNAME", songplay_name);
startService(i);
服务类：
public class MyService extends Service {
static MediaPlayer mediaPlayer;
static int pauseplay;
static NotificationManager notificationManagerPlay;
static CharSequence tickerText;
static Notification notification4;//Notification variable(for song playing)
TelephonyManager telephonyManager;
PhoneStateListener listener;
static Notification notification;
static NotificationManager mNotificationManager;
String songurl;
String songname;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
super.onCreate();
mediaPlayer = new MediaPlayer();
pauseplay = 1;
MainMenu.serviceRunning = 1;
telephonyManager = (TelephonyManager) getSystemService(
Context.TELEPHONY_SERVICE);
// Create a new PhoneStateListener
listener = new PhoneStateListener() {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch (state) {
case TelephonyManager.CALL_STATE_IDLE:
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
break;
case TelephonyManager.CALL_STATE_RINGING:
if (mediaPlayer.isPlaying() == true && mediaPlayer != null){
pauseSong();
}
break;
}
}
};
// Register the listener wit the telephony manager
telephonyManager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
}
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
if (intent != null) {
Bundle bundle = intent.getExtras();
//Retrieve your data using the name
songurl = bundle.getString("songURL");
Bundle bundle2 = intent.getExtras();
//Retrieve your data using the name
songname = bundle2.getString("songNAME");
}
Toast toast = Toast.makeText(getApplicationContext(), "Now Playing: "
+ songname, Toast.LENGTH_LONG);
toast.show();
// configure the intent
Intent playIntent = new Intent(MyService.this, SongList.class);
final PendingIntent pendingIntent = PendingIntent.getActivity(
MyService.this, 0, playIntent, 0);
notification = new Notification(R.drawable.playicon, "Buffering...",
System.currentTimeMillis());
notification.contentView = new RemoteViews(getPackageName(),
R.layout.custom_notification2);
notification.contentIntent = pendingIntent;
if (SongList.bitmap != null) {
notification.contentView.setImageViewBitmap(R.id.notifimage,
SongList.bitmap);
} else {
notification.contentView.setImageViewResource(R.id.notifimage,
R.drawable.icon);
}
notification.contentView
.setTextViewText(R.id.notiftitle, "Now Playing");
notification.contentView.setTextViewText(R.id.notiftext, songname);
notification.flags = notification.flags
| Notification.FLAG_ONGOING_EVENT;
mNotificationManager = (NotificationManager) getApplicationContext()
.getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(4, notification);
mediaPlayer.reset();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mediaPlayer.setDataSource(songurl);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// register an error listener via MediaPlayer's setOnErrorListener
mediaPlayer.setOnErrorListener(new OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
Log.e("MEDIAPLAYER ERRORS", "what: " + what + " extra: "
+ extra);
mediaPlayer.reset();
mNotificationManager.cancel(4);
return false;
}
});
mediaPlayer.prepareAsync();
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
mediaPlayer.start();
}
});
mediaPlayer
.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){
public void onCompletion(MediaPlayer mp) {
stopSelf();
}
});
return START_STICKY;
}
@Override
public void onDestroy() {
MainMenu.serviceRunning = 0;
mNotificationManager.cancel(4);
}
public static void pauseSong() {
if (mediaPlayer.isPlaying() == true) {
mediaPlayer.pause();
mNotificationManager.cancel(4);
pauseplay = 0;
}
}
public static void playSong() {
if (pauseplay == 0) {
mNotificationManager.notify(4, notification);
mediaPlayer.start();
pauseplay = 1;
}
}
}
stopService()。 - CommonsWare