alarm发起服务及spinner显示个数

1.

final Intent intent = new Intent(context, YourService.class);?
final PendingIntent pending = PendingIntent.getService(context, 0, intent, 0);?
final AlarmManager alarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);?
alarm.cancel(pending);?
long interval = 30000;//milliseconds?
alarm.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(),interval, pending);?

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2.

?.setDropDownHeight(int height)