update

lib/views/user/serve/google/index_page.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:otp/otp.dart';
 
 class UserServeGooglePage extends StatefulWidget {
   const UserServeGooglePage({Key? key}) : super(key: key);
@@ -8,13 +9,52 @@ class UserServeGooglePage extends StatefulWidget {
 }
 
 class _UserServeGooglePageState extends State<UserServeGooglePage> {
+  String code = '000000';
+  String secret = 'T4UM3VPYXPALF7M5';
+  int remaining = 0;
+
+  @override
+  void initState() {
+    super.initState();
+    getCode();
+  }
+
+  void getCode() {
+    setState(() {
+      remaining = OTP.remainingSeconds();
+
+      code = OTP.generateTOTPCodeString(
+        secret,
+        DateTime.now().millisecondsSinceEpoch,
+        algorithm: Algorithm.SHA1,
+        isGoogle: true,
+      );
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         title: const Text('谷歌验证器'),
       ),
-      body: Container(),
+      body: Column(
+        children: [
+          Text(
+            code,
+            style: const TextStyle(
+              fontSize: 32,
+            ),
+          ),
+          Text(remaining.toString()),
+          ElevatedButton(
+            onPressed: () {
+              getCode();
+            },
+            child: const Text('刷新密码'),
+          ),
+        ],
+      ),
     );
   }
 }