amap_location/lib/amap_view.dart

import 'dart:io';

import 'package:amap_location/amap_view_controller.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

typedef OnPlatformViewCreated(AmapViewController controller);

class AmapView extends StatefulWidget {
  final OnPlatformViewCreated onPlatformViewCreated;

  const AmapView({Key key, this.onPlatformViewCreated}) : super(key: key);

  @override
  _AmapViewState createState() => _AmapViewState();
}

class _AmapViewState extends State<AmapView> {
  static const String viewType = "com.i2edu.mapView";

  @override
  Widget build(BuildContext context) {
    return Platform.isAndroid
        ? AndroidView(
            viewType: viewType,
            creationParams: {},
            creationParamsCodec: const StandardMessageCodec(),
            onPlatformViewCreated: onPlatformViewCreated,
          )
        : UiKitView(
            viewType: viewType,
            creationParams: {},
            creationParamsCodec: const StandardMessageCodec(),
            onPlatformViewCreated: onPlatformViewCreated,
          );
  }

  void onPlatformViewCreated(int id) {
    final AmapViewController controller = AmapViewController(id);
    if (widget.onPlatformViewCreated != null) {
      widget.onPlatformViewCreated(controller);
    }
  }
}