carga inicial

lib/home/home.dart

@@ -0,0 +1,60 @@
+import 'package:appcardsstarter/funcoes_gerais.dart';
+import 'package:flutter/material.dart';
+import 'package:url_launcher/url_launcher.dart';
+import 'package:webview_flutter/webview_flutter.dart';
+
+class HomeScreen extends StatefulWidget {
+  @override
+  _HomeScreenState createState() => _HomeScreenState();
+}
+
+class _HomeScreenState extends State<HomeScreen> with AutomaticKeepAliveClientMixin<HomeScreen> {
+  bool error = false;
+  String msg = '';
+  @override
+  Widget build(BuildContext context) {
+    super.build(context);
+    return SafeArea(
+      child: this.error ? this._buildError() : WebView(
+        initialUrl: FuncoesGerais.homeURL,
+        javascriptMode: JavascriptMode.unrestricted,
+        onWebResourceError: (err){
+          this.error = true;
+          this.msg = err.description;
+          setState(() {
+          });
+        },
+        navigationDelegate: (navigation){
+          print(navigation.url);
+          if (navigation.url.startsWith(FuncoesGerais.dominioPermitido)) {
+            return NavigationDecision.navigate;
+          }
+          //print('allowing navigation to $request');
+          launch(navigation.url);
+          return NavigationDecision.prevent;
+        },
+      ),
+    );
+  }
+
+  Widget _buildError(){
+    return Center(
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        crossAxisAlignment: CrossAxisAlignment.center,
+        children: [
+          Text(msg),
+          RaisedButton(onPressed: (){
+            this.error = false;
+            this.msg = '';
+            setState(() {
+            });
+          }, child: Text('Atualizar'),)
+        ],
+      ),
+    );
+  }
+
+  @override
+  bool get wantKeepAlive => true;
+}