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Ví dụ này cho biết cách biểu thị vị trí của người dùng dưới dạng một chấm màu xanh dương và hiển thị nút
Vị trí của tôi ở góc dưới bên phải của bản đồ. Khi người dùng nhấn vào nút này, bản đồ sẽ xoay đến vị trí hiện tại của người dùng.
Bắt đầu
Trước khi có thể thử mã mẫu, bạn phải định cấu hình môi trường phát triển.
Để biết thêm thông tin, hãy xem bài viết Thiết lập dự án Flutter.
Xem mã
Dart
// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
/// User's location is shown as a blue dot and the My Location button
/// is displayed in the bottom right corner of the map. When the user taps
/// the button, the map pans to the user's current location.
class MyLocationSample extends StatefulWidget {
const MyLocationSample({super.key});
@override
State<MyLocationSample> createState() => _MyLocationSampleState();
}
class _MyLocationSampleState extends State<MyLocationSample> {
/// To use My Location on some platforms (such as Android),
/// you need to ask the user for permission at runtime. See below.
bool? _permissionGranted;
@override
Widget build(BuildContext context) {
return GoogleMap(
initialCameraPosition: CameraPosition(target: LatLng(37.78, -122.42)),
// Enables the My Location layer.
//
// This feature is not available on all platforms and you MUST have
// the appropriate location permission enabled in order for this to work.
// See documentation of [GoogleMap.myLocationEnabled] for details.
myLocationEnabled: _permissionGranted ?? false,
// You can choose whether to show the button that lets the user
// transport the camera to their current location.
// This has no effect when `myLocationEnabled` is false.
myLocationButtonEnabled: true,
);
}
@override
void initState() {
super.initState();
_requestPermission();
}
/// A *fake* implementation of requesting the permission.
///
/// Real apps will use 3rd party packages such as `package:permission_handler`
/// or build their own bespoke solution.
Future<void> _requestPermission() async {
// Wait a bit before continuing. This is required here because we call this
// function from initState(), and that's too soon to be showing dialogues.
await Future<void>.delayed(const Duration(seconds: 1));
if (!mounted) return;
var result = await showDialog<bool>(
context: context,
builder: (context) => SimpleDialog(
title: Text('Requesting permission'),
children: [
SimpleDialogOption(
onPressed: () => Navigator.pop(context, true),
child: Text('Grant'),
),
SimpleDialogOption(
onPressed: () => Navigator.pop(context, false),
child: Text('Deny'),
),
],
),
);
if (!mounted) return;
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text(
'Fake permission granted: $result. '
'Remember that for My Location to actually work, '
'you need an actual runtime permission on some platforms. '
'See the code of this sample for more info.',
),
duration: const Duration(seconds: 10),
showCloseIcon: true,
),
);
setState(() {
_permissionGranted = result;
});
}
}
Các bước tiếp theo
Xem bộ mẫu đầy đủ trên GitHub:
Xem trên GitHub
Ngoài ra, bạn có thể sao chép toàn bộ bộ mẫu để chạy các mẫu đó trên máy bằng cách thực thi các lệnh sau:
git clone -b flutter_samples https://github.com/googlemaps-samples/flutter-maps-samples.git
cd flutter-samples
flutter pub get
Trừ phi có lưu ý khác, nội dung của trang này được cấp phép theo Giấy phép ghi nhận tác giả 4.0 của Creative Commons và các mẫu mã lập trình được cấp phép theo Giấy phép Apache 2.0. Để biết thông tin chi tiết, vui lòng tham khảo Chính sách trang web của Google Developers. Java là nhãn hiệu đã đăng ký của Oracle và/hoặc các đơn vị liên kết với Oracle.
Cập nhật lần gần đây nhất: 2025-09-03 UTC.
[null,null,["Cập nhật lần gần đây nhất: 2025-09-03 UTC."],[],[],null,["# Show my location\n\nThis example shows how to represent the user's location as a blue dot, and display the **My Location** button in the bottom right corner of the map. When the user taps the button, the map pans to the user's current location.\n\nGet started\n-----------\n\nBefore you can try the sample code, you must configure your development environment.\nFor more information, see [Set up a Flutter project](/maps/flutter-package/config).\n\nView the code\n-------------\n\n### Dart\n\n```python\n// Copyright 2025 Google LLC\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// https://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nimport 'dart:async';\n\nimport 'package:flutter/material.dart';\nimport 'package:google_maps_flutter/google_maps_flutter.dart';\n\n/// User's location is shown as a blue dot and the My Location button\n/// is displayed in the bottom right corner of the map. When the user taps\n/// the button, the map pans to the user's current location.\nclass MyLocationSample extends StatefulWidget {\n const MyLocationSample({super.key});\n\n @override\n State\u003cMyLocationSample\u003e createState() =\u003e _MyLocationSampleState();\n}\n\nclass _MyLocationSampleState extends State\u003cMyLocationSample\u003e {\n /// To use My Location on some platforms (such as Android),\n /// you need to ask the user for permission at runtime. See below.\n bool? _permissionGranted;\n\n @override\n Widget build(BuildContext context) {\n return GoogleMap(\n initialCameraPosition: CameraPosition(target: LatLng(37.78, -122.42)),\n\n // Enables the My Location layer.\n //\n // This feature is not available on all platforms and you MUST have\n // the appropriate location permission enabled in order for this to work.\n // See documentation of [GoogleMap.myLocationEnabled] for details.\n myLocationEnabled: _permissionGranted ?? false,\n\n // You can choose whether to show the button that lets the user\n // transport the camera to their current location.\n // This has no effect when `myLocationEnabled` is false.\n myLocationButtonEnabled: true,\n );\n }\n\n @override\n void initState() {\n super.initState();\n _requestPermission();\n }\n\n /// A *fake* implementation of requesting the permission.\n ///\n /// Real apps will use 3rd party packages such as `package:permission_handler`\n /// or build their own bespoke solution.\n Future\u003cvoid\u003e _requestPermission() async {\n // Wait a bit before continuing. This is required here because we call this\n // function from initState(), and that's too soon to be showing dialogues.\n await Future\u003cvoid\u003e.delayed(const Duration(seconds: 1));\n if (!mounted) return;\n\n var result = await showDialog\u003cbool\u003e(\n context: context,\n builder: (context) =\u003e SimpleDialog(\n title: Text('Requesting permission'),\n children: [\n SimpleDialogOption(\n onPressed: () =\u003e Navigator.pop(context, true),\n child: Text('Grant'),\n ),\n SimpleDialogOption(\n onPressed: () =\u003e Navigator.pop(context, false),\n child: Text('Deny'),\n ),\n ],\n ),\n );\n\n if (!mounted) return;\n ScaffoldMessenger.of(context).showSnackBar(\n SnackBar(\n content: Text(\n 'Fake permission granted: $result. '\n 'Remember that for My Location to actually work, '\n 'you need an actual runtime permission on some platforms. '\n 'See the code of this sample for more info.',\n ),\n duration: const Duration(seconds: 10),\n showCloseIcon: true,\n ),\n );\n\n setState(() {\n _permissionGranted = result;\n });\n }\n}\nhttps://github.com/googlemaps-samples/flutter-maps-samples/blob/8f227e8b4d07179e5fb7cc5e8d8cb5440befd229/lib/samples/my_location.dart\n \n```\n\nNext steps\n----------\n\nView the complete set of samples on GitHub:\n\n[View on GitHub](https://github.com/googlemaps-samples/flutter-maps-samples/tree/main/lib/samples)\n\nAlternatively, clone the full set of samples to run them locally by executing the following commands: \n\n git clone -b flutter_samples https://github.com/googlemaps-samples/flutter-maps-samples.git\n cd flutter-samples\n flutter pub get"]]