使用预建数据库升级Android App

Question

I have an Android App with a pre-built SQLite DB packaged with it. However, I'm sure that if I want to do an upgrade with an upgraded/altered/new database it will be tricky. I found this out on my emulator and handset. When I changed DBs (keeping the name the same, or altered the DB and put it back into the assets directory, and then ran the app on the emulator, it wouldn't read the new DB, but would keep the old database. The only way to get rid of the old DB, it seems, is to delete the app and reinstall it. WHich is what I do when I test my apps on my handset after changing the database. Another option is to change the name of the database, and all references to it in the code, but this doubles the database storage of the app and wastes space.

Answer 1

Take a look at SQLiteOpenHelper - it will help you maintain the DB within your app.

http://www.devx.com/wireless/Article/40842

It also has a database version property which you can increment, and it wipes the DB and recreates it. It also allows you to update your database easily, without affecting user data (if you plan on doing future updates to your app).

I think this is what you're looking for.