Android UserManager: Check if user is owner (admin)

Question

Im developing an app with the latest android version (4.2.1 API-Level 17) for tablets with multiuser capabilities.

I want to restrict certain features (like the acce

Answer 1

You can create an extension property in Kotlin to make it simpler:

val UserManager.isCurrentUserDeviceOwner: Boolean
    get() = if (SDK_INT >= 23) isSystemUser
    else if (SDK_INT >= 17) getSerialNumberForUser(Process.myUserHandle()) == 0L
    else true

Then, using it is as simple as the following:

val userManager = context.getSystemService(Context.USER_SERVICE) as UserManager
if (userManager.isCurrentUserDeviceOwner) TODO() else TODO()

You can further reduce boilerplate by using global system services definitions that makes userManager and other Android System Services available anywhere in your Kotlin code, with code included in this library I made: https://github.com/LouisCAD/Splitties/tree/master/systemservices