Firebase database getInstance crashes app

Question

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 https://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
@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

score 18 · Accepted Answer · edited Jan 17 '18 at 08:09

18

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

edited Jan 17 '18 at 08:09

Jean-François Corbett

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answered May 21 '16 at 17:12

Vihaan Verma

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How did you resolve this ? I've wasted a lot of time on this. Tried redownloading google-service.json to no avail – Hormigas Nov 12 '16 at 02:03
You have probably enabled the database after you have downloaded google-services.json. Then just download it again from the Firebase site (https://console.firebase.google.com/) – Elvis Lima Apr 23 '17 at 17:33

score 0 · Answer 2 · answered Sep 08 '20 at 07:19

Changing google-services.json file didn't worked for me later i found out that i was using implementation 'com.google.firebase:firebase-analytics:17.5.0' implementation 'com.google.firebase:firebase-database:16.0.4' instead of implementation 'com.google.firebase:firebase-analytics-ktx:17.5.0' implementation 'com.google.firebase:firebase-database-ktx:19.4.0'

score -2 · Answer 3 · edited Jan 17 '18 at 08:10

-2

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().

edited Jan 17 '18 at 08:10

Jean-François Corbett

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answered Jul 25 '16 at 23:36

colour Blue

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Firebase database getInstance crashes app

3 Answers3

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