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I'm having trouble when trying to open "Apps & Notifications" in Settings. When I try to do it, Settings crashes and the Launcher's Homescreen is shown.

Unable to start activity
 ComponentInfo{com.android.settings/com.android.settings.SubSettings}:
  java.lang.NullPointerException:
   Attempt to invoke virtual method
    'void com.android.settings.applications
     .SpecialAppAccessPreferenceController
     .setSession(com.android.settingslib.core.lifecycle.Lifecycle)'
on a null object reference`

This also happens when an App tries to open a Permissions Dialog (grant Overlay permission) or when I try to open the "App info" Activity for any app.

This is on a Windows 7 machine.

Here's a related entry in Google's issue tracker we can star: https://issuetracker.google.com/issues/132401131

Fixed in Beta 4

Daniel F
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  • Same here on **Linux** (grant permission dialog & settings -> apps & noti.) and saw it on a colleague's **MacBook too** (settings -> apps & noti.) – Ben May 17 '19 at 07:21
  • Most likely you are tripping over bugs in the Settings app. Create a project that reproduces the error, then file a bug report. – CommonsWare May 17 '19 at 11:16
  • @CommonsWare I don't even need a project for this bug to occur. Just start the emulator and open Settings -> Apps &... makes it crash. :( – Daniel F May 17 '19 at 11:18
  • Oh, sorry, I thought these were from your app trying to start Settings for those screens. Still, consider filing a bug report. – CommonsWare May 17 '19 at 11:20
  • Yes, I'm currently browsing the Issue Tracker at https://issuetracker.google.com/issues?q=componentid:192727%2B – Daniel F May 17 '19 at 11:20
  • @CommonsWare Ok, it has aready been reported last week https://issuetracker.google.com/issues/132401131 thanks for the hint. – Daniel F May 17 '19 at 11:22
  • There are 2 different API 29 Downloads available when creating a new emulated device in Android Studio: The first one with API Level "Q" with API 29 and the other one called: API Level "29" ("9+") both show API 29 with Google APIs and the latter one does NOT crash on my setup. I can navigate to system settings App and also starting Activity from a Service does work (like it should, regarding to documentation for Q?) I hope that is the "real/correct" one and not that buggy piece of "Q" emu. – Ben Jun 11 '19 at 12:36
  • @Ben This issue got resolved with the Beta 4 which got released a few days before or on Jun 6. If you delete all you Q-Downloads and then install "Google APIs Intel x86 Atom_64 System Image (revision: 5)", then it should work. – Daniel F Jun 11 '19 at 12:37
  • @Daniel F Thanks - good to know, I still have that other Q installed and thought updating the SDK and AS would fix it one day, but obviously it did not. I'll do so! – Ben Jun 11 '19 at 12:40

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