[google_maps_flutter] examples - move renderer initialization

Author: jokerttu

packages/google_maps_flutter/google_maps_flutter/example/lib/main.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:google_maps_flutter_android/google_maps_flutter_android.dart';
 import 'package:google_maps_flutter_platform_interface/google_maps_flutter_platform_interface.dart';
@@ -77,6 +79,34 @@ void main() {
       GoogleMapsFlutterPlatform.instance;
   if (mapsImplementation is GoogleMapsFlutterAndroid) {
     mapsImplementation.useAndroidViewSurface = true;
+    initializeMapRenderer();
   }
   runApp(const MaterialApp(home: MapsDemo()));
 }
+
+Completer<AndroidMapRenderer?>? _initializedRendererCompleter;
+
+/// Initializes map renderer to with `latest` renderer type for Android platform.
+/// The renderer must be requested before creating GoogleMap instances,
+/// as the renderer can be initialized only once per application context.
+Future<AndroidMapRenderer?> initializeMapRenderer() async {
+  if (_initializedRendererCompleter != null) {
+    return _initializedRendererCompleter!.future;
+  }
+
+  _initializedRendererCompleter = Completer<AndroidMapRenderer?>();
+
+  WidgetsFlutterBinding.ensureInitialized();
+
+  final GoogleMapsFlutterPlatform mapsImplementation =
+      GoogleMapsFlutterPlatform.instance;
+  if (mapsImplementation is GoogleMapsFlutterAndroid) {
+    mapsImplementation.initializeWithRenderer(AndroidMapRenderer.latest).then(
+        (AndroidMapRenderer initializedRenderer) =>
+            _initializedRendererCompleter!.complete(initializedRenderer));
+  } else {
+    _initializedRendererCompleter!.complete(null);
+  }
+
+  return _initializedRendererCompleter!.future;
+}

packages/google_maps_flutter/google_maps_flutter/example/lib/map_map_id.dart

@@ -4,13 +4,12 @@
 
 // ignore_for_file: public_member_api_docs
 
-import 'dart:async';
 import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:google_maps_flutter/google_maps_flutter.dart';
 import 'package:google_maps_flutter_android/google_maps_flutter_android.dart';
-import 'package:google_maps_flutter_platform_interface/google_maps_flutter_platform_interface.dart';
+import 'main.dart';
 import 'page.dart';
 
 class MapIdPage extends GoogleMapExampleAppPage {
@@ -42,7 +41,7 @@ class MapIdBodyState extends State<MapIdBody> {
 
   @override
   void initState() {
-    _initializeMapRenderer()
+    initializeMapRenderer()
         .then<void>((AndroidMapRenderer? initializedRenderer) => setState(() {
               _initializedRenderer = initializedRenderer;
             }));
@@ -56,7 +55,7 @@ class MapIdBodyState extends State<MapIdBody> {
       case AndroidMapRenderer.legacy:
         return 'legacy';
       default:
-        return 'initializing';
+        return 'unknown';
     }
   }
 
@@ -142,23 +141,3 @@ class MapIdBodyState extends State<MapIdBody> {
     });
   }
 }
-
-Completer<AndroidMapRenderer?>? _initializedRendererCompleter;
-Future<AndroidMapRenderer?> _initializeMapRenderer() async {
-  if (_initializedRendererCompleter != null) {
-    return _initializedRendererCompleter!.future;
-  }
-
-  _initializedRendererCompleter = Completer<AndroidMapRenderer?>();
-  final GoogleMapsFlutterPlatform mapsImplementation =
-      GoogleMapsFlutterPlatform.instance;
-  if (mapsImplementation is GoogleMapsFlutterAndroid) {
-    mapsImplementation.initializeWithRenderer(AndroidMapRenderer.latest).then(
-        (AndroidMapRenderer initializedRenderer) =>
-            _initializedRendererCompleter!.complete(initializedRenderer));
-  } else {
-    _initializedRendererCompleter!.complete(null);
-  }
-
-  return _initializedRendererCompleter!.future;
-}

packages/google_maps_flutter/google_maps_flutter_android/example/lib/main.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:google_maps_flutter_android/google_maps_flutter_android.dart';
 import 'package:google_maps_flutter_platform_interface/google_maps_flutter_platform_interface.dart';
@@ -76,5 +78,29 @@ void main() {
   final GoogleMapsFlutterPlatform platform = GoogleMapsFlutterPlatform.instance;
   // Default to Hybrid Composition for the example.
   (platform as GoogleMapsFlutterAndroid).useAndroidViewSurface = true;
+  initializeMapRenderer();
   runApp(const MaterialApp(home: MapsDemo()));
 }
+
+Completer<AndroidMapRenderer?>? _initializedRendererCompleter;
+
+/// Initializes map renderer to with `latest` renderer type.
+/// The renderer must be requested before creating GoogleMap instances,
+/// as the renderer can be initialized only once per application context.
+Future<AndroidMapRenderer?> initializeMapRenderer() async {
+  if (_initializedRendererCompleter != null) {
+    return _initializedRendererCompleter!.future;
+  }
+
+  _initializedRendererCompleter = Completer<AndroidMapRenderer?>();
+
+  WidgetsFlutterBinding.ensureInitialized();
+
+  final GoogleMapsFlutterPlatform platform = GoogleMapsFlutterPlatform.instance;
+  (platform as GoogleMapsFlutterAndroid)
+      .initializeWithRenderer(AndroidMapRenderer.latest)
+      .then((AndroidMapRenderer initializedRenderer) =>
+          _initializedRendererCompleter!.complete(initializedRenderer));
+
+  return _initializedRendererCompleter!.future;
+}

packages/google_maps_flutter/google_maps_flutter_android/example/lib/map_map_id.dart

@@ -4,13 +4,12 @@
 
 // ignore_for_file: public_member_api_docs
 
-import 'dart:async';
-
 import 'package:flutter/material.dart';
 import 'package:google_maps_flutter_android/google_maps_flutter_android.dart';
 import 'package:google_maps_flutter_platform_interface/google_maps_flutter_platform_interface.dart';
 
 import 'example_google_map.dart';
+import 'main.dart';
 import 'page.dart';
 
 class MapIdPage extends GoogleMapExampleAppPage {
@@ -42,7 +41,7 @@ class MapIdBodyState extends State<MapIdBody> {
 
   @override
   void initState() {
-    _initializeMapRenderer()
+    initializeMapRenderer()
         .then<void>((AndroidMapRenderer? initializedRenderer) => setState(() {
               _initializedRenderer = initializedRenderer;
             }));
@@ -56,7 +55,7 @@ class MapIdBodyState extends State<MapIdBody> {
       case AndroidMapRenderer.legacy:
         return 'legacy';
       default:
-        return 'initializing';
+        return 'unknown';
     }
   }
 
@@ -134,25 +133,3 @@ class MapIdBodyState extends State<MapIdBody> {
     });
   }
 }
-
-Completer<AndroidMapRenderer?>? _initializedRendererCompleter;
-Future<AndroidMapRenderer?> _initializeMapRenderer() async {
-  // Map renderer can be requested only once.
-  // Returns existing copleter future for serial requests.
-  if (_initializedRendererCompleter != null) {
-    return _initializedRendererCompleter!.future;
-  }
-
-  _initializedRendererCompleter = Completer<AndroidMapRenderer?>();
-  final GoogleMapsFlutterPlatform mapsImplementation =
-      GoogleMapsFlutterPlatform.instance;
-  if (mapsImplementation is GoogleMapsFlutterAndroid) {
-    mapsImplementation.initializeWithRenderer(AndroidMapRenderer.latest).then(
-        (AndroidMapRenderer initializedRenderer) =>
-            _initializedRendererCompleter!.complete(initializedRenderer));
-  } else {
-    _initializedRendererCompleter!.complete(null);
-  }
-
-  return _initializedRendererCompleter!.future;
-}