monitorBatteryStatus method

Implementation

Future<Stream<ExtendedBatteryStatus>?> monitorBatteryStatus() async {
  if (!isAndroid) {
    debugPrint('monitorBatteryStatus: not supported on this platform');
    return null;
  }
  if (_streamBatteryController != null) {
    log('monitorBatteryStatus: already monitoring');
    return _streamBatteryController!.stream;
  }
  _streamBatteryController = StreamController<ExtendedBatteryStatus>.broadcast();
  _streamBatteryController!.onCancel = () {
    log('monitorBatteryStatus: onCancel');
    _streamBatteryController?.close();
    _streamBatteryController = null;
  };
  final dynamic result = await _methodChannel.invokeMethod('monitorBatteryStatus');
  debugPrint('monitorBatteryStatus: ${result.runtimeType}, $result');
  return _streamBatteryController!.stream;
}