Where to place an existing database in an Android studio project

Question

I want to use the existing sqlite database in Android projects - Android Studio. I did a search on Google, some suggest placing it in the Assets folder. However, there is no such folder in the project structure. The folder structure in the project is as follows

-res
--drawable
--layout
--menu
--mipmap
--values

Should I just add the Assets folder or place the sqlite db file elsewhere.
Disclaimer: I am new to Android Studio and Android development.

Answer 1

File- > New- > Folders- > Folder Folder db

Answer 2

"" , "res", . , , sqlite. Android Studio .

EDIT: :

+ main
++ assets
+++ db.sqlite
++ java
++ res

Answer 3

. Control ( Option) "app", , "".