I have problems. I create an application which is on starting it will synchronize the database in external storage with database on website if any data changed it will appear dialog to ask "Do u want update". I put my database on website http://example.com/folder/mydb.db and for android I put it on external at data/data/database/mydb How to check any database changed?
Need more information about the server side of it. Bottom line: you'll have to have some way for the server to give you either a timestamp of its last update or a changeset or something.