Building a data layer in sqlite for android is a bit of time consuming. Recently, we have moved to the IOS world. I found that is a bit easier to build in data layer in there. It has Core data concept which is a kind of ORM. But that is completely OOP storage. Please do not think in sql way. I tried to find auto number key and foreign key in Core data. There is no such things ,please think in objects and relationship. That works and is easy too!