Writing data to Firebase from a fragment in Android Studio

Question

So, I have a fragment class and I am trying to write data to Firebase Realtime database using the below code in onCreateView() method,

databaseReference = FirebaseDatabase.getInstance().getReference("CollectionName"); String id = databaseReference.push().getKey(); databaseReference.child(id).setValue(new myModel(param1, param2));

After running this code, whenever I try to write data, I am getting below error:

Default FirebaseApp is not initialized in this process <package_name>. Make sure to call FirebaseApp.initializeApp(Context) first.

This error points to the line where I am trying to get the instance from the firebase.

Now, I've tried many things like using below statement in onCreate() method,

FirebaseApp.initializeApp(MainActivity.getContext());

Here, MainActivity is the class from where this fragment loads.

Also, I have all the necessary dependencies installed in both my Module level and Project level gradle files.

Reaz Masud · Accepted Answer · 2020-09-29 20:05:12Z

2

I think you could just initialize the Firebase in the onCreate function of your MainActivity using the following.

FirebaseApp.initializeApp(this);

If you want to initialize it from your fragment, you could do this in the onCreateView before calling the FirebaseDatabase.getInstance().

FirebaseApp.initializeApp(getActivity());

answered Sep 29, 2020 at 20:05

Reaz Masud

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4 Comments

nvt_dc Over a year ago

Thanks for the help, I tried to use both the options but it didn't work!

Reaz Masud Over a year ago

Strange! Do you see anything in the log saying initialization unsuccessful? If that's the case, you might consider checking this answer - stackoverflow.com/a/37901548/3145960

nvt_dc Over a year ago

No. There's no log related to FirebaseInitProvider tag

nvt_dc Over a year ago

So, I figured it out that the issue was that I missed out to apply one plugin in Module level gradle file.

Jeremy Caney · Accepted Answer · 2024-11-20 01:38:55Z

Just open the built.gradle.kts (Module:app) file and add this line on the dependencies:

implementation("com.google.firebase:firebase-database:20.3.0")

and then click on :synch now.

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