Room loading database from file

How to load Room Android Database from file on SD card? This is code for saving the database:

private void saveAppDatabase() {
    try {
        File sd = Environment.getExternalStorageDirectory();

        if (sd.canWrite()) {
            String currentDBPath =
                    getDatabasePath("AppDatabase").getAbsolutePath();
            String backupDBPath = "AppDatabase.db";
            File currentDB = new File(currentDBPath);
            File backupDB = new File(sd, backupDBPath);

            if (currentDB.exists()) {
                FileChannel src = new FileInputStream(currentDB).getChannel();
                FileChannel dst = new FileOutputStream(backupDB).getChannel();
                dst.transferFrom(src, 0, src.size());
                src.close();
                dst.close();
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Thank you for help!