toUint8List method
Implementation
Uint8List? toUint8List(String? hexStr){
if(hexStr == null){
return null;
}
List<int> data = [];
final length = hexStr.length;
for(int i= 0;i<length/2;i++){
final String str = hexStr.substring(0+i*2,2+i*2);
data.add(_hexTwoStrToInt(str));
}
return Uint8List.fromList(data);
}