概要 targetSdkVersionが19以降の場合はAlarmManagerの set() 及び setRepeating() が厳密ではなくなるという話。 Android 4.4 APIs #BehaviorAlarms | Android Developers When you set your app's targetSdkVersion to "19" or higher, alarms that you create using either set() or setRepeating() will be inexact. 詳細 Android 4.4 APIs #BehaviorAlarms | Android Developersより。 When you set your app's targetSdkVersion to "19" or higher, alarms t