Convert an arbitrarily long hexadecimal string to a number in Dart?

You can use int.parse('001479B7', radix: 16);

https://api.dartlang.org/stable/2.4.1/dart-core/int/parse.html

so your code will look like this :

void main() {  final fullString = '001479B70054DB6E001475B3';  for (int i = 0; i <= fullString.length - 8; i += 8) {    final hex = fullString.substring(i, i + 8);    final number = int.parse(hex, radix: 16);    print(number);  }}

Since my Hex string came smaller than 8 elements of Byte, I did this.

String dumpHexToString(List<int> data) {      StringBuffer sb = StringBuffer();      data.forEach((f) {        sb.write(f.toRadixString(16).padLeft(2, '0'));        sb.write(" ");      });      return sb.toString();    }    String conertHexDecimal(String str1) {      final fullString = str1;      int number = 0;      for (int i = 0; i <= fullString.length - 8; i += 8) {        final hex = fullString.substring(i, i + 8);        number = int.parse(hex, radix: 16);        print(number);      }      return number.toString();    }void executarConersao(Uint8List data){String conersorHexDeVar = dumpHexToString(data);        conersorHexDeVar = conersorHexDeVar            .substring(3, conersorHexDeVar.length)            .replaceAll(' ', '')            .padLeft(8, '0');        conersorHexDeVar = conertHexDecimal(conersorHexDeVar);        print('data $conersorHexDeVar');}