Help required for Android Firebase Database Integration

Hi All,

I need help regarding integrating the Firebase Database with my List android app. I have created an synchronized To Do list app that connects to the Firebase Database and also stores entries offline. However when I first open the app it takes around 1 min to show the existing items on the list.

Can anyone with knowledge of Firebase help me regarding this. It would be very helpful.

I have already tried the following documentation and article.

https://firebase.google.com/docs/database/
https://www.codecademy.com/en/tracks/firebase
http://www.androidtutorialpoint.com/...base-tutorial/

Thanks in Advance.

Meenal