seems timer not work well, will try https://github.com/hanxu317317/flutter_plan_demo/blob/master/lib/src/enter.dart

flutter_hbb/lib/main.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'common.dart';
 import 'home_page.dart';
-import 'package:flutter_easyloading/flutter_easyloading.dart';
 
 void main() {
   runApp(App());
@@ -20,7 +19,7 @@ class App extends StatelessWidget {
             primarySwatch: Colors.blue,
             visualDensity: VisualDensity.adaptivePlatformDensity,
           ),
-          home: FlutterEasyLoading(child: HomePage(title: 'RustDesk')),
+          home: HomePage(title: 'RustDesk'),
         ));
   }
 }

flutter_hbb/lib/remote_page.dart

@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'common.dart';
 import 'package:flutter/services.dart';
 import 'dart:ui' as ui;
+import 'package:flutter_easyloading/flutter_easyloading.dart';
+import 'dart:async';
 
 class RemotePage extends StatefulWidget {
   RemotePage({Key key, this.id}) : super(key: key);
@@ -12,20 +14,42 @@ class RemotePage extends StatefulWidget {
   _RemotePageState createState() => _RemotePageState();
 }
 
+// https://github.com/hanxu317317/flutter_plan_demo/blob/master/lib/src/enter.dart
 class _RemotePageState extends State<RemotePage> {
+  Timer _interval;
+
   @override
   void initState() {
     super.initState();
     FFI.connect(widget.id);
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      showLoading("Connecting...");
+      _interval =
+          Timer.periodic(Duration(milliseconds: 30), (timer) => interval());
+    });
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    _interval.cancel();
+    dismissLoading();
+    FFI.close();
+  }
+
+  void interval() {
+    print(1);
   }
 
   @override
   Widget build(BuildContext context) {
+    // Size size = MediaQueryData.fromWindow(ui.window).size;
     // https://stackoverflow.com/questions/46640116/make-flutter-application-fullscreen
     SystemChrome.setEnabledSystemUIOverlays([]);
-    return CustomPaint(
+    return FlutterEasyLoading(
+        child: CustomPaint(
       painter: new ImageEditor(image: null),
-    );
+    ));
   }
 }
 
@@ -38,12 +62,12 @@ class ImageEditor extends CustomPainter {
 
   @override
   void paint(Canvas canvas, Size size) {
-    if (image = null) return;
+    if (image == null) return;
     canvas.drawImage(image, new Offset(0.0, 0.0), new Paint());
   }
 
   @override
   bool shouldRepaint(CustomPainter oldDelegate) {
-    return false;
+    return oldDelegate != this;
   }
 }