Service裏常駐Notification，可以在後臺低內存的時候不被kill

public class MyService extends Service {
	private Notification nf;
	private NotificationManager nfm;
	private MyAIDL.Stub binder=new Stub() {
		
		@Override
		public void aa() throws RemoteException {
			System.out.println("aa"+Process.myPid());
			
		}
	};

<span style="white-space:pre">	</span><span style="font-size:48px;">//這裏</span>

	@Override
	public void onCreate() {
		System.out.println("onCreate");
		
		nfm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
		
		nf = new Notification(R.drawable.ic_launcher,"新消息",System.currentTimeMillis());
		
		nf.setLatestEventInfo(this, "有新消息啦", "嘻嘻嘻嘻", PendingIntent
				.getActivity(this, 0,
						new Intent(this, MainActivity.class), 0));
		startForeground(1, nf);

		
	
	}

	@Override
	public void onStart(Intent intent, int startId) {
		System.out.println("onStart");
		
		
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		System.out.println("onStartCommand");
		return super.onStartCommand(intent, flags, startId);
	}

	@Override
	public void onDestroy() {
		System.out.println("onDestroy");

	}

	@Override
	public boolean onUnbind(Intent intent) {
		System.out.println("onUnbind");
		return super.onUnbind(intent);
	}

	
	

	// 現實歸納轉型
	public IBinder onBind(Intent intent) {
		System.out.println("onBind");
		
		return binder;
	}