firebase Crashlytics ndk symbols is missing

Issue

I want to check the crash log on android NDK.

I initialized fabric like this:

final Fabric fabric = new Fabric.Builder(this)
                        .kits(new Crashlytics(), new CrashlyticsNdk())
                        .debuggable(true) // Enables Crashlytics debugger
                        .build();
Fabric.with(fabric);

and set up gradle with crashlytics(2.9.1), crashlytics-ndk(2.0.2).

log was successfully added, but all symbol was missing.

so I added crashlyticsUploadSymbols to my gradle app, but it has an error.

ERROR - Crashlytics Developer Tools error.
java.lang.IllegalArgumentException: Crashlytics found an invalid API key: null. 
Check the Crashlytics plugin to make sure that the application has been added successfully! 

how can I upload symbols to firebase? Or is there is another way to see the symbols?

Solution

Mike from Firebase here. If you're seeing this issue, please make sure you're running the Fabric gradle plugin 1.25.1 or higher which added this support. From the release notes:

1.25.1: December 4, 2017 Enabled native symbol upload for apps using Crashlytics via Firebase.

Answered By - Mike Bonnell