FirebaseCorePlugin.java uses unchecked or unsafe operations.

[kw2019ltd]

Note: C:\Tools\flutter_windows_v1.0.0-stable\flutter.pub-cache\hosted\pub.dartlang.org\firebase_core-0.3.1+1\android\src\main\java\io\flutter\plugins\firebase\core\FirebaseCorePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

[breezage]

I also got this warning just now

[joxad]

Same here, I updated my project to be Android X compliant, but it is still working.

[hariangr]

I am currently trying to install Crashlytics, and get the same error

[PandaGeek1024]

Im getting the same error now. the only difference I can tell is I recently upgraded to AndroidX.
Here is my config
cloud_firestore: ^0.9.0
google_sign_in: ^4.0.0
firebase_auth: ^0.8.0+1

[ishakdas]

still not found a solution?

[EduardoLR10]

The solution for this problem is all about using the latest and "greatest" versions of the packages. Once I started using the latest version all the warnings disappear.

[ktchernov]

@EduardoLR10 on latest packages, still getting the same problem:

google_sign_in: ^4.0.1+3
firebase_auth: ^0.11.0

[GustavoContreiras]

Same here today with these versions

Note: G:\Dev\Flutter\.pub-cache\hosted\pub.dartlang.org\cloud_firestore-0.11.0+2\android\src\main\java\io\flutter\plugins\firebase\cloudfirestore\CloudFirestorePlugin.java uses or overrides a deprecated API.

Note: Recompile with -Xlint:deprecation for details.
Note: G:\Dev\Flutter\.pub-cache\hosted\pub.dartlang.org\cloud_firestore-0.11.0+2\android\src\main\java\io\flutter\plugins\firebase\cloudfirestore\CloudFirestorePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: G:\Dev\Flutter\.pub-cache\hosted\pub.dartlang.org\connectivity-0.4.3+1\android\src\main\java\io\flutter\plugins\connectivity\ConnectivityPlugin.java uses or overrides a deprecated API.

Note: Recompile with -Xlint:deprecation for details.
Note: G:\Dev\Flutter\.pub-cache\hosted\pub.dartlang.org\firebase_core-0.4.0+1\android\src\main\java\io\flutter\plugins\firebase\core\FirebaseCorePlugin.java uses unchecked or unsafe operations.

[Matze5590]

+1
not able to build an apk...

[bradmuzza]

I have the same issue

[miente-dijkstra]

Had the same issue and solved it (in Android Studio): Go into File → Invalidate Caches / Restart