Android Question custom notification

[Rasoull]

Hi, how can I create a custom notification like this? I need to apply a custom font, background color and text size.

 

[Marvel]

NBY is your answer.
You'll need to create XML files for it.

 

[Rasoull]

NBY is your answer.
You'll need to create XML files for it.

How should I use the xml file? The notification builder library gives the channel ID not set and I can not use it.