restoreDatabase.java

private void restoreDatabase(InputStream inputStreamNewDB) {
        appDatabase.close();

        //Delete the existing restoreFile and create a new one.
        sharedPreferences.edit().putBoolean("restoringDatabase", true).apply();
        deleteRestoreBackupFile(getApplicationContext());
        backupDatabaseForRestore(this, getApplicationContext());

        File oldDB = this.getDatabasePath(DATABASE_NAME);
        if (inputStreamNewDB != null) {
            try {
                Utils.copyFile((FileInputStream) inputStreamNewDB, new FileOutputStream(oldDB));
                Utils.showSnackbar(findViewById(android.R.id.content), getString(R.string.restore_success), 1);
              //Take the user to home screen and there we will validate if the database file was actually restored correctly.
            } catch (IOException e) {
                Log.d(LOGGER, "ex for is of restore: " + e);
                e.printStackTrace();
            }
        } else {
            Log.d(LOGGER, "Restore - file does not exists");
        }
    }