fix: 修正安卓用戶使用返回鍵退回不正當頁面

lib/HomePage.dart

@@ -29,7 +29,8 @@ class _HomePageState extends State<HomePage> {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
+    return PopScope(
+      child: Scaffold(
         body: Center(
           child: Column(
             children: [
@@ -118,6 +119,8 @@ class _HomePageState extends State<HomePage> {
             ],
           ),
         ),
+      ),
+      canPop: false,
     );
   }
 

lib/main.dart

@@ -69,7 +69,9 @@ class _LoginPageState extends State<LoginPage> {
   @override
   Widget build(BuildContext context) {
     debugPaintSizeEnabled=false;
-    return Scaffold(
+    //by use PopScope and disable can Pop avoid android user pop back by back button
+    return PopScope(
+      child: Scaffold(
         //appBar: AppBar(
           //title: Text('Demo'),
           //backgroundColor: Color(0xFF81D4FA),
@@ -170,6 +172,8 @@ class _LoginPageState extends State<LoginPage> {
             ),
           ),
         ),
+      ),
+      canPop: false,
     );
   }
   void loginBtn() async {