Firebase database getInstance crashes app


Firebase database getInstance crashes app



When running the sample after creating google-service.json, the app crashes when trying to get database reference in SignInActivity


mDatabase = FirebaseDatabase.getInstance().getReference();



Crash log


05-21 09:27:27.644 488-488/com.google.firebase.quickstart.database D/AndroidRuntime: Shutting down VM
05-21 09:27:27.644 488-488/com.google.firebase.quickstart.database E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.google.firebase.quickstart.database, PID: 488
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.google.firebase.quickstart.database/com.google.firebase.quickstart.database.SignInActivity}: com.google.firebase.database.DatabaseException: Failed to get

FirebaseDatabase instance: FirebaseApp object has no DatabaseURL in its FirebaseOptions object.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: com.google.firebase.database.DatabaseException: Failed to get FirebaseDatabase instance: FirebaseApp object has no DatabaseURL in its FirebaseOptions object.
at com.google.firebase.database.FirebaseDatabase.getInstance(Unknown Source)
at com.google.firebase.database.FirebaseDatabase.getInstance(Unknown Source)
at com.google.firebase.quickstart.database.SignInActivity.onCreate(SignInActivity.java:39)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)



How to fix this issue ?





Check if the google-service.json contains the url of your database.
– Gabriele Mariotti
May 21 '16 at 15:22





@GabrieleMariotti googl-services.json generation link developers.google.com/mobile/add doesn't seem to be doing anything related to firebase
– Vihaan Verma
May 21 '16 at 16:46





Inside the file you should have something like: "project_info": { "project_number": "xxxxxxx", "firebase_url": "https://yourname-xxx.firebaseio.com",....
– Gabriele Mariotti
May 21 '16 at 16:48


"project_info": { "project_number": "xxxxxxx", "firebase_url": "https://yourname-xxx.firebaseio.com",....





@GabrieleMariotti thanks you pointed me out in the right direction. I was download the wrong google-services.json file from developers.google.com/mobile/add instead of firebase project.
– Vihaan Verma
May 21 '16 at 17:13




2 Answers
2



Download google-services.json from Project Settings in the Firebase console. My mistake was downloading it from https://developers.google.com/mobile/add.





How did you resolve this ? I've wasted a lot of time on this. Tried redownloading google-service.json to no avail
– Anant
Nov 12 '16 at 2:03





You have probably enabled the database after you have downloaded google-services.json. Then just download it again from the Firebase site (console.firebase.google.com)
– Elvis Lima
Apr 23 '17 at 17:33



mFirebaseDatabaseReference = database.getInstance().getReference("root-element in firebase");


mFirebaseDatabaseReference = database.getInstance().getReference("root-element in firebase");



When you call getReference you need to provide a URL. If your project is bound already in Firebase with the database you have created, use the root element of the data in Firebase as the parameter to getReference().


getReference


getReference()






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