show-about-dialog-flutter

void _showAboutDialog() async {
  PackageInfo packageInfo = await PackageInfo.fromPlatform();
  showAboutDialog(
      context: context,
      applicationName: packageInfo.appName,
      applicationVersion: packageInfo.version,
      applicationIcon: const SizedBox(
        width: 48,
        height: 48,
        child: Image(
          image: AssetImage('assets/icon_generic.png'),
        ),
      ),
      applicationLegalese: "test, 2021");
}

SnackBar-flutter

ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
  content: Text("Could not open URL."),
  duration: Duration(seconds: 1),
));