AlarmManagerで定期的に繰り返しサービスを実行する

一定時間に処理を実行したり、定期的に処理を繰り返すにはAlarmManagerを使用します。
今回は、AlarmManagerで定期的にServiceを実行するメモです。


AlarmManager でサービスを登録

1. ServiceのIntentを作成します。
2. Serviceを開始するPendingIntentを取得します。
3. AlarmManager#setInexactRepeatingでアラームをスケジュールします。

	Intent serviceIntent = new Intent(this, MyService.class);
	PendingIntent pendingIntent
	= PendingIntent.getService(this, 0, serviceIntent, PendingIntent.FLAG_UPDATE_CURRENT);
	AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
	am.setInexactRepeating (
	AlarmManager.RTC,
	System.currentTimeMillis(),
	//AlarmManager.INTERVAL_HOUR,
	AlarmManager.INTERVAL_FIFTEEN_MINUTES,
	pendingIntent);

view raw To start the repeatedly running.java hosted with ❤ by GitHub

AlarmManager.RTC - wall-clock timew in UTC 要は現実世界での経過時間
AlarmManager.INTERVAL_FIFTEEN_MINUTES - 15分(900000秒) Intervalの定数

AlarmManager でサービスを解除

	Intent serviceIntent = new Intent(this, MyService.class);
	PendingIntent pendingIntent
	= PendingIntent.getService(this, 0, serviceIntent, PendingIntent.FLAG_UPDATE_CURRENT);
	AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
	am.cancel(pendingIntent);

view raw To stop the repeatedly running.java hosted with ❤ by GitHub

adb コマンドで、AlarmManagerの登録状態を確認

	# adb shell dumpsys alarm
	Current Alarm Manager state:
	Realtime wakeup (now=1308812542789):
	RTC #2: Alarm{487c9590 type 1 net.granoeste.example.repeatedlyrunning}
	type=1 when=1308813378896 repeatInterval=900000 count=1
	operation=PendingIntent{487f4ac0: PendingIntentRecord{487bb340 net.granoeste.example.repeatedlyrunning startService}}
	Elapsed realtime wakeup (now=620467383):
	Broadcast ref count: 0
	Alarm Stats:
	net.granoeste.example.repeatedlyrunning
	44ms running, 0 wakeups
	1 alarms: flg=0x4 cmp=net.granoeste.example.repeatedlyrunning/.MyService

view raw dumpsys alarm hosted with ❤ by GitHub