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Crash on setup when no other IME is installed

See original GitHub issue

Short description

App crashes on setup when no other IME is installed. This can be tested by installing it into Shelter

Steps to reproduce

Have no other IME installed
Install Shelter
Tap on install APK into Shelter
Select FlorisBoard APK and install
Launch FlorisBoard
See error

Screen recording

https://user-images.githubusercontent.com/24937357/109780594-72594380-7c07-11eb-8b57-a727a7c544c3.mp4

Environment information

FlorisBoard Version: 0.3.8
Install Source: GitHub
Device: OnePlus 8T
Android version, ROM: 11, Paranoid Android Ruby Beta 4

I don’t have any IMEs other than FlorisBoard installed since I removed Gboard via Magisk Debloater module after installing FlorisBoard (before creating the work profile). I think that’s the problem because installing and enabling any other IME in the work profile and then launching FlorisBoard fixes it.

~~~ 1614758721583.stacktrace ~~~

java.lang.NullPointerException: activeImeIds must not be null
	at dev.patrickgold.florisboard.ime.core.FlorisBoard$Companion.checkIfImeIsEnabled(FlorisBoard.kt:126)
	at dev.patrickgold.florisboard.setup.EnableImeFragment.onResume(EnableImeFragment.kt:50)
	at androidx.fragment.app.Fragment.performResume(Fragment.java:2747)
	at androidx.fragment.app.FragmentStateManager.resume(FragmentStateManager.java:373)
	at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1199)
	at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1356)
	at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1434)
	at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:442)
	at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2169)
	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1992)
	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1947)
	at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1818)
	at androidx.fragment.app.BackStackRecord.commitNow(BackStackRecord.java:297)
	at androidx.viewpager2.adapter.FragmentStateAdapter$FragmentMaxLifecycleEnforcer.updateFragmentMaxLifecycle(FragmentStateAdapter.java:726)
	at androidx.viewpager2.adapter.FragmentStateAdapter$FragmentMaxLifecycleEnforcer$1.onPageScrollStateChanged(FragmentStateAdapter.java:632)
	at androidx.viewpager2.widget.CompositeOnPageChangeCallback.onPageScrollStateChanged(CompositeOnPageChangeCallback.java:87)
	at androidx.viewpager2.widget.CompositeOnPageChangeCallback.onPageScrollStateChanged(CompositeOnPageChangeCallback.java:87)
	at androidx.viewpager2.widget.ScrollEventAdapter.dispatchStateChanged(ScrollEventAdapter.java:426)
	at androidx.viewpager2.widget.ScrollEventAdapter.onScrolled(ScrollEventAdapter.java:214)
	at androidx.recyclerview.widget.RecyclerView.dispatchOnScrolled(RecyclerView.java:5173)
	at androidx.recyclerview.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:5338)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1056)
	at android.view.Choreographer.doCallbacks(Choreographer.java:878)
	at android.view.Choreographer.doFrame(Choreographer.java:807)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1041)
	at android.os.Handler.handleCallback(Handler.java:938)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loop(Looper.java:223)
	at android.app.ActivityThread.main(ActivityThread.java:7701)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:952)