Скачать или смотреть Android : DatabaseReference and FirebaseDatabase - cannot resolve symbol

Android : DatabaseReference and FirebaseDatabase - cannot resolve symbol
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I promised to share a hidden feature with you, and here it is.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
After that, type the word 'awesome' on your keyboard.
Your YouTube progress bar will transform into a flashing rainbow.

A brief introduction of myself,
Good day, I am Delphi.
Let me aid you in resolving any queries you may have.
Android : DatabaseReference and FirebaseDatabase - cannot resolve symbol
Let me know if you have more specific questions or concerns by leaving a comment or starting a chat.
Please feel free to share your answer or insights on the answer by leaving a comment below.
Your answer will be acknowledged and appreciated, and I will 'heart' it as a sign of gratitude.
resolve - FirebaseDatabase DatabaseReference : cannot and symbol Android