I am a newbie in Android, Java, and SQLite. I am now reading two tutorials:
Could you tell me which one should I follow?
It does not matter. It's just a file name and both approaches result in valid file names. sqlite does not require any specific file naming convention. The files are placed under databases
in your app's private directory so if you're browising the file system, it's easy to tell they are database files even if they do not have any extension.