App just opens and closes after running from android studio on android phone

Question

App just opens and closes after running from android studio on android studio.

Following warning is also shown :

The app gradle file must have a dependency on co

Answer 1

Assuming all other setup is correct, the error is self explanatory. You need to add a dependency on Firebase Core in your app gradle file under dependencies:

implementation 'com.google.firebase:firebase-core:16.0.1'

You might also want to check out the link below for any missing steps.

Add Firebase to Android Project

Answer 2

Try using the Firebase tool within Android Studio. Select the service you want to integrate, and follow the step-by-step instructions.