stampDateTimePlain method
Look at the comments in previous function. Output like: 2017-12-23 08:47:27
Implementation
String stampDateTimePlain() {
var now = DateTime.now();
var formatterYmd = DateFormat('yyyy-MM-dd');
String formattedYmd = formatterYmd.format(now);
var formatterHms = DateFormat('Hms');
String formattedHms = formatterHms.format(now);
var dateTimeStampNow = (' $formattedYmd $formattedHms ');
return dateTimeStampNow;
}