Java Android : get all tables and their values from Sqlite database and make it parcellable

I have an Android project with a sqlite DB that contains 5 tables. I would like to create a method in order to get all values from all tables in my DB and create a parcel. My main goal is to use BackupAgent to send it to a cloud backup service. However, I'm a bit confused. I don't know where to start. Do I need to process all tables separately? There must be a way to process all tables and their values in one method and make one parcel from whole DB but I'm not sure.

Thank you for your help.