Android用のWebViewを追加。OSのブラウザは起動できないため。

lib/pages/WebView/WebView_page.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+import 'package:webview_flutter/webview_flutter.dart';
+
+class WebViewPage extends StatelessWidget {
+  final String url;
+
+  const WebViewPage({Key? key, required this.url}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('WebView'),
+      ),
+      body: WebView(
+        initialUrl: url,
+        javascriptMode: JavascriptMode.unrestricted,
+      ),
+    );
+  }
+}