Should I use java JDBC for mysql connection in android ? how is it done generally ?

I am new to android & I am trying to learn how to connect my app to a Mysql database.

With some research I found that its not recommended to use JDBC for Database connection in Android.

Also some alternatives I found seem pretty weird, they were using a PHP file to handle the connection and query part inside the App.

I am confused now, Can you please explain how I should co about doing it ?

and also how its generally recommended ?