ManufacturerData.fromString constructor

ManufacturerData.fromString(String manufacturerData)

Creates an instance of ManufacturerData from the provided string. In the provided string, the first two bytes represent the manufacturer identifier, and the remaining bytes represent the manufacturer-specific payload.

This factory constructor is used with data returned from the native side in response to Method Channel calls.

Implementation

factory ManufacturerData.fromString(String manufacturerData) {
  // Convert the manufacturer data string to a list of integers.
  final Uint8List manufacturerDataInts = Uint8List.fromList(
    List<int>.generate(
      manufacturerData.length ~/ 2,
      (i) => int.parse(manufacturerData.substring(i * 2, i * 2 + 2), radix: 16),
    ),
  );

  // Extract the manufacturer identifier and the payload.
  final Uint8List manufacturerId = Uint8List.sublistView(manufacturerDataInts, 0, 2);
  final Uint8List payload = Uint8List.sublistView(manufacturerDataInts, 2);

  return ManufacturerData(
    manufacturerId: manufacturerId,
    payload: payload,
  );
}