[google_maps_flutter] Modified README.md to fix minor syntax issues

packages/google_maps_flutter/google_maps_flutter/CHANGELOG.md

@@ -3,6 +3,10 @@
 * Updates code for new analysis options.
 * Updates code for `no_leading_underscores_for_local_identifiers` lint.
 
+## 2.2.2
+
+* Modified `README.md` to fix minor syntax issues and added Code Excerpt to `README.md`.
+
 ## 2.2.1
 
 * Updates imports for `prefer_relative_imports`.

packages/google_maps_flutter/google_maps_flutter/README.md

@@ -1,5 +1,7 @@
 # Google Maps for Flutter
 
+<?code-excerpt path-base="excerpts/packages/google_maps_flutter_example"?>
+
 [![pub package](https://img.shields.io/pub/v/google_maps_flutter.svg)](https://pub.dev/packages/google_maps_flutter)
 
 A Flutter plugin that provides a [Google Maps](https://developers.google.com/maps/) widget.
@@ -105,46 +107,33 @@ the `GoogleMap`'s `onMapCreated` callback.
 
 ### Sample Usage
 
+<?code-excerpt "readme_sample.dart (MapSample)"?>
 ```dart
-import 'dart:async';
-
-import 'package:flutter/material.dart';
-import 'package:google_maps_flutter/google_maps_flutter.dart';
-
-void main() => runApp(MyApp());
-
-class MyApp extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Flutter Google Maps Demo',
-      home: MapSample(),
-    );
-  }
-}
-
 class MapSample extends StatefulWidget {
+  const MapSample({Key? key}) : super(key: key);
+
   @override
   State<MapSample> createState() => MapSampleState();
 }
 
 class MapSampleState extends State<MapSample> {
-  Completer<GoogleMapController> _controller = Completer();
+  final Completer<GoogleMapController> _controller =
+      Completer<GoogleMapController>();
 
-  static final CameraPosition _kGooglePlex = CameraPosition(
+  static const CameraPosition _kGooglePlex = CameraPosition(
     target: LatLng(37.42796133580664, -122.085749655962),
     zoom: 14.4746,
   );
 
-  static final CameraPosition _kLake = CameraPosition(
+  static const CameraPosition _kLake = CameraPosition(
       bearing: 192.8334901395799,
       target: LatLng(37.43296265331129, -122.08832357078792),
       tilt: 59.440717697143555,
       zoom: 19.151926040649414);
 
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
+    return Scaffold(
       body: GoogleMap(
         mapType: MapType.hybrid,
         initialCameraPosition: _kGooglePlex,
@@ -154,8 +143,8 @@ class MapSampleState extends State<MapSample> {
       ),
       floatingActionButton: FloatingActionButton.extended(
         onPressed: _goToTheLake,
-        label: Text('To the lake!'),
-        icon: Icon(Icons.directions_boat),
+        label: const Text('To the lake!'),
+        icon: const Icon(Icons.directions_boat),
       ),
     );
   }
@@ -164,7 +153,6 @@ class MapSampleState extends State<MapSample> {
     final GoogleMapController controller = await _controller.future;
     controller.animateCamera(CameraUpdate.newCameraPosition(_kLake));
   }
-}
 ```
 
 See the `example` directory for a complete sample app.

packages/google_maps_flutter/google_maps_flutter/example/build.excerpt.yaml

@@ -0,0 +1,15 @@
+targets:
+  $default:
+    sources:
+      include:
+        - lib/**
+        # Some default includes that aren't really used here but will prevent
+        # false-negative warnings:
+        - $package$
+        - lib/$lib$
+      exclude:
+        - '**/.*/**'
+        - '**/build/**'
+    builders:
+      code_excerpter|code_excerpter:
+        enabled: true

packages/google_maps_flutter/google_maps_flutter/example/lib/readme_sample.dart

@@ -0,0 +1,72 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// ignore_for_file: public_member_api_docs
+
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:google_maps_flutter/google_maps_flutter.dart';
+
+void main() => runApp(const MyApp());
+
+class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return const MaterialApp(
+      title: 'Flutter Google Maps Demo',
+      home: MapSample(),
+    );
+  }
+}
+
+// #docregion MapSample
+class MapSample extends StatefulWidget {
+  const MapSample({Key? key}) : super(key: key);
+
+  @override
+  State<MapSample> createState() => MapSampleState();
+}
+
+class MapSampleState extends State<MapSample> {
+  final Completer<GoogleMapController> _controller =
+      Completer<GoogleMapController>();
+
+  static const CameraPosition _kGooglePlex = CameraPosition(
+    target: LatLng(37.42796133580664, -122.085749655962),
+    zoom: 14.4746,
+  );
+
+  static const CameraPosition _kLake = CameraPosition(
+      bearing: 192.8334901395799,
+      target: LatLng(37.43296265331129, -122.08832357078792),
+      tilt: 59.440717697143555,
+      zoom: 19.151926040649414);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: GoogleMap(
+        mapType: MapType.hybrid,
+        initialCameraPosition: _kGooglePlex,
+        onMapCreated: (GoogleMapController controller) {
+          _controller.complete(controller);
+        },
+      ),
+      floatingActionButton: FloatingActionButton.extended(
+        onPressed: _goToTheLake,
+        label: const Text('To the lake!'),
+        icon: const Icon(Icons.directions_boat),
+      ),
+    );
+  }
+
+  Future<void> _goToTheLake() async {
+    final GoogleMapController controller = await _controller.future;
+    controller.animateCamera(CameraUpdate.newCameraPosition(_kLake));
+  }
+  // #enddocregion MapSample
+}

packages/google_maps_flutter/google_maps_flutter/pubspec.yaml

@@ -2,7 +2,7 @@ name: google_maps_flutter
 description: A Flutter plugin for integrating Google Maps in iOS and Android applications.
 repository: https://github.com/flutter/plugins/tree/main/packages/google_maps_flutter/google_maps_flutter
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
-version: 2.2.1
+version: 2.2.2
 
 environment:
   sdk: ">=2.14.0 <3.0.0"