app/lib/paegs/map_demo/map_demo_page.dart

import 'package:amap_flutter_base/amap_flutter_base.dart';
import 'package:amap_flutter_map/amap_flutter_map.dart';
import 'package:flutter/material.dart';

class MapDemoPage extends StatefulWidget {
  @override
  _MapDemoPageState createState() => _MapDemoPageState();
}

class _MapDemoPageState extends State<MapDemoPage> {
  static final CameraPosition _kInitialPosition = const CameraPosition(
    target: LatLng(39.909187, 116.397451),
    zoom: 10.0,
  );
  List<Widget> _approvalNumberWidget = List<Widget>();

  @override
  Widget build(BuildContext context) {
    final AMapWidget map = AMapWidget(
      initialCameraPosition: _kInitialPosition,
      onMapCreated: onMapCreated,
    );

    return Scaffold(
      body: map,
    );
  }

  AMapController _mapController;

  void onMapCreated(AMapController controller) {
    setState(() {
      _mapController = controller;
      getApprovalNumber();
    });
  }

  /// 获取审图号
  void getApprovalNumber() async {
    //普通地图审图号
    String mapContentApprovalNumber =
        await _mapController?.getMapContentApprovalNumber();
    //卫星地图审图号
    String satelliteImageApprovalNumber =
        await _mapController?.getSatelliteImageApprovalNumber();
    setState(() {
      if (null != mapContentApprovalNumber) {
        _approvalNumberWidget.add(Text(mapContentApprovalNumber));
      }
      if (null != satelliteImageApprovalNumber) {
        _approvalNumberWidget.add(Text(satelliteImageApprovalNumber));
      }
    });
    print('地图审图号（普通地图）: $mapContentApprovalNumber');
    print('地图审图号（卫星地图): $satelliteImageApprovalNumber');
  }
}