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I have made two activities Register and Signin, but when I run my code it crashes with the following error message:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.firebasemessagingapp/com.example.firebasemessagingapp.LoginActivity}: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.example.firebasemessagingapp. Make sure to call FirebaseApp.initializeApp(Context) first

Dave
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kishan gupta
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1 Answers1

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Add this line in your onCreate Of activity

FirebaseApp.initializeApp(Context)
Sandeep Parish
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