问Flutter SQFLite资源数据库

EN

E/SQLiteLog(29199): (8) statement aborts at 1: [PRAGMA user_version = 1] attempt to write a readonly database I/flutter (29199): error DatabaseException(attempt to write a readonly database (code 8 SQLITE_READONLY)) sql 'PRAGMA user_version = 1' args []} during open, closing...

_initDatabase() async {

    var databasePath = await getDatabasesPath();
    var path = join(databasePath, "example.db");

    var exists = await databaseExists(path);

    if (!exists) {
         print('creating a new copy from asset!');

     try {
         await Directory(dirname(path)).create(recursive: true);
     } catch (_) {}

     ByteData data = await rootBundle.load(join("assets", "example.db"));
     List<int> bytes =
      data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);

      await File(path).writeAsBytes(bytes, flush: true);
   } else {
      print('opening existing database');
}

return await openDatabase(path, version: _dbVersion, readOnly: true);