How can i make the app work offline with Firebase database

Question

My app gets the data while its connected to internet but I want the app to get the data offline from cache. Please help I'm new to Firebase.

Answer 1

Simply activate offline persistens as specified in the official documentation :

Firebase applications work even if your app temporarily loses its network connection. You can enable disk persistence with just one line of code:

FirebaseDatabase.getInstance().setPersistenceEnabled(true);

Answer 2

You try this it will help for you

First create an application class

public class BaseApp extends Application {

@Override
public void onCreate() {
    super.onCreate();
    FirebaseDatabase.getInstance().setPersistenceEnabled(true);
    Picasso.Builder builder = new Picasso.Builder(this);
    builder.downloader(new OkHttpDownloader(this, Integer.MAX_VALUE));
    Picasso build = builder.build();
    build.setIndicatorsEnabled(false);
    build.setLoggingEnabled(true);
    Picasso.setSingletonInstance(build);
}
}

Keeping the data fresh using the below line

DatabaseReference mRootRef =FirebaseDatabase.getInstance().getReference("images");
mRootRef.keepSynced(true);

More details on persistence and syncing can be read here in the Firebase documentation: https://firebase.google.com/docs/database/android/offline-capabilities