microphone permission

I am developing a security application that listens to surrounding sounds. I start recording sound from a microphone as a service. On older versions of Android, everything works well, even when the smartphone is sleeping. But in the new version 12-13 Android, when the smartphone falls asleep...

Hi all. I have a question. My app needs to use a microphone to record a voice message to play it later. On the first start after installation it asks for a permission to use a microphone and if the use allows it it works fine. But what if the user on the first start allowed it and later for...