How to replace country code to flag emoji in flutter

Question

i have a list of countries with their sortname/countrycode in json format, which will be called in flutter. Is there a way i can convert all this code with their flag emojis?

For example: "sortname": "PL" will gives 🇵🇱 (idk if you guys can see the flag or not)

{
	"sortname": "PL",
	"name": "Poland",
}, {
	"sortname": "PT",
	"name": "Portugal",
}, {
	"sortname": "PR",
	"name": "Puerto Rico",
}, {
	"sortname": "QA",
	"name": "Qatar",
}, {
	"sortname": "RE",
	"name": "Reunion",
}, {
	"sortname": "RO",
	"name": "Romania",
}, {
	"sortname": "RU",
	"name": "Russia",
},

Answer 1

Here's how I did it:

String countryCode = 'us';
String flag = countryCode.toUpperCase().replaceAllMapped(RegExp(r'[A-Z]'),
     (match) => String.fromCharCode(match.group(0).codeUnitAt(0) + 127397));
print(flag);

1. .toUpperCase() Make all characters uppercase

   • us → US

2. RegExp(r'[A-Z]') Select each character with regex

3. .replaceAllMapped() Get each matched character

   • U
   • S

4. .codeUnitAt(0) Convert each character to a rune

   • 85
   • 83

5. + 127397 Convert each rune to a regional indicator symbol

127397 = 127462 (🇦's HTML code) - 65 (A's rune value).

• 85 + 127397 = 127482
• 83 + 127397 = 127480

6. .fromCharCode() Convert the regional indicator symbols' values to a string (flag emoji)

   • 🇺 🇸 → 🇺🇸

Answer 2

you could try flutter_emoji package