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android-alarmsandroid-install-apk

State of Alarm when App is reinstalled

Hi I have an app that sets an alarm to do a specific operation when the alarm is triggered.

In case if I re-install the app, what will happen to the Alarm that was set previously? Will it still be active? or will it be killed due to re-installation.

Will there be any change in behavior if the app is a System app? I mean will the alarm be active even in the case of re-installation for System apps?

Solution

  • See this question.

    The alarms set by your applications are removed when your app is uninstalled. I believe the same it true for system apps (have never tried though).

    To make sure that you have alarms are scheduled correctly you can do the following:

    1. On application start check whether alarms exist and set them if necessary.
    2. Subscribe to BOOT_COMPLETED intent and do #1 in your receiver.