Backup Room Database Method in Android

backupDatabase.java

public static void backupDatabase(Context context) {
        AppDatabase appDatabase = AppDatabase.getAppDatabase(context);
        appDatabase.close();
        File dbfile = context.getDatabasePath(DATABASE_NAME);
        File sdir = new File(getFilePath(context, 0), "backup");
        String fileName = FILE_NAME + getDateFromMillisForBackup(System.currentTimeMillis());
        String sfpath = sdir.getPath() + File.separator + fileName;
        if (!sdir.exists()) {
            sdir.mkdirs();
        } else {
            //Directory Exists. Delete a file if count is 5 already. Because we will be creating a new.
            //This will create a conflict if the last backup file was also on the same date. In that case,
            //we will reduce it to 4 with the function call but the below code will again delete one more file.
            checkAndDeleteBackupFile(sdir, sfpath);
        }
        File savefile = new File(sfpath);
        if (savefile.exists()) {
            Log.d(LOGGER, "File exists. Deleting it and then creating new file.");
            savefile.delete();
        }
        try {
            if (savefile.createNewFile()) {
                int buffersize = 8 * 1024;
                byte[] buffer = new byte[buffersize];
                int bytes_read = buffersize;
                OutputStream savedb = new FileOutputStream(sfpath);
                InputStream indb = new FileInputStream(dbfile);
                while ((bytes_read = indb.read(buffer, 0, buffersize)) > 0) {
                    savedb.write(buffer, 0, bytes_read);
                }
                savedb.flush();
                indb.close();
                savedb.close();
                SharedPreferences sharedPreferences = context.getSharedPreferences(SHAREDPREF, MODE_PRIVATE);
                sharedPreferences.edit().putString("backupFileName", fileName).apply();
                updateLastBackupTime(sharedPreferences);
            }
        } catch (Exception e) {
            e.printStackTrace();
            Log.d(LOGGER, "ex: " + e);
        }
    }