Encrypted Room db

encrypted_room_db.kt

abstract class EncryptedDatabase : RoomDatabase() {
    companion object {
        fun getInstance(passcode: CharArray, context: Context):
            EncryptedDatabase = buildDatabase(passcode, context)
        
        private fun buildDatabase(
            passcode: CharArray,
            context: Context
        ): EncryptedDatabase {
            // DatabaseKeyMgr is a singleton that all of the above code is wrapped into.
            // Ideally this should be injected through DI but to simplify the sample code
            // we'll retrieve it as follows
            val dbKey = DatabaseKeyMgr.getInstance().getCharKey(passcode, context)
            val supportFactory = SupportFactory(SQLiteDatabase.getBytes(dbKey))
            return Room.databaseBuilder(context, EncryptedDatabase::class.java,
                "encrypted-db").openHelperFactory(supportFactory).build()
        }
    }
}

@RahulSDeshpande sorry for the extremely late response, just now seeing this. DatabaseKeyMgr is a class you'd create that encapsulates all of the functions/logic I mention in my guide. That way you have a centralized place to create/store/retrieve the database key.

SupportFactory comes from the url you mentioned.