How could we convert SQLite database to a Realm database?
Is there any way to use pre-populated databases with Realm on Android?
Currently there is no way to automatically convert a SQLite database to a Realm database, you would have to manually read all data from the SQLite database and insert them into Realm.
An alternative could be the Realm browser that might make this easier, but it is currently available for MacOS X only. You can read more here: https://github.com/realm/realm-java/issues/435
For the second part: As Realm databases are just a single file so you can easily add a pre-populated realm database to you app and reference it with Realm.getInstance().