updateAlpha method

Future<bool> updateAlpha (
  1. double alpha
)

更新透明度

Android独有

Implementation

Future<bool> updateAlpha(double alpha) async {
  bool ret = await BMFMapDispatcherFactory.instance.markerDispatcher
      .updateMarkerMember(this.methodChannel, {
    'id': this.Id,
    'member': 'alpha',
    'value': alpha,
  });

  if (ret) {
    this.alpha = alpha;
  }

  return ret;
}