Question

I have a web app which I can create some notes, each time I create a new note, it will insert to a table with an auto_increment id. (quite obvious)

Now I want to develop an android app which I can create notes too (save them locally in sqlite), and then syncronize those notes with the server.

The problem is, when I create notes in my phone they will have their own auto_increment id which many times will be the same with those notes in server!

I don’t care to have duplicated notes (actually I don’t think there is a way to differentiate if the new note is duplicated or not, because they don’t have some physical id), the problem is if they have same id (primary key), I won’t be able to insert them to the server.

Any suggestion?

Answer 1

You could use an UUID as a key for your note.

That way, each entry should have an unique id, be it created on the server or on the client.

To create a UUID, you can use UUID.randomUUID().