init

example/lib/main.dart

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+import 'dart:math';
+
+import 'package:flutter/material.dart';
+import 'dart:async';
+
+import 'package:flutter/services.dart';
+import 'package:zhiwen/zhiwen.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatefulWidget {
+  const MyApp({super.key});
+
+  @override
+  State<MyApp> createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
+  String _platformVersion = 'Unknown';
+  final _zhiwenPlugin = Zhiwen();
+
+  @override
+  void initState() {
+    super.initState();
+    initPlatformState();
+  }
+
+  // Platform messages are asynchronous, so we initialize in an async method.
+  Future<void> initPlatformState() async {
+    String platformVersion;
+    // Platform messages may fail, so we use a try/catch PlatformException.
+    // We also handle the message potentially returning null.
+    try {
+      platformVersion =
+          await _zhiwenPlugin.getPlatformVersion() ?? 'Unknown platform version';
+    } on PlatformException {
+      platformVersion = 'Failed to get platform version.';
+    }
+
+    // If the widget was removed from the tree while the asynchronous platform
+    // message was in flight, we want to discard the reply rather than calling
+    // setState to update our non-existent appearance.
+    if (!mounted) return;
+
+    setState(() {
+      _platformVersion = platformVersion;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ScaffoldMessenger(
+      child: MaterialApp(
+        home: Scaffold(
+        appBar: AppBar(
+          title: const Text('Plugin example app'),
+        ),
+        body: Center(
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Text('Running on: $_platformVersion\n'),
+              ElevatedButton(
+                onPressed: () async {
+                  bool result = await _zhiwenPlugin.openDevice("USB", 9600);
+                },
+                child: const Text('打开设备'),
+              ),
+              ElevatedButton(
+                onPressed: () async {
+                  await _zhiwenPlugin.closeDevice();
+                },
+                child: const Text('关闭设备'),
+              ),
+              ElevatedButton(
+                onPressed: () async {
+                  var random = Random();
+                  int randomNumber = random.nextInt(100); // 生成 0 到 99 的随机整数
+
+                  Map<String, dynamic> result = await _zhiwenPlugin.enrollFingerprint(randomNumber);
+                  print(result);
+                },
+                child: const Text('录入指纹'),
+              ),
+              ElevatedButton(
+                onPressed: () async {
+                  int userId = 24;
+                  Map<String, dynamic> result = await _zhiwenPlugin.verifyFingerprint(userId);
+                  print(result);
+                },
+                child: const Text('验证指纹'),
+              ),
+              ElevatedButton(
+                onPressed: () async {
+                  Map<String, dynamic> result = await _zhiwenPlugin.deleteAllFingerprint();
+                  print(result);
+                },
+                child: const Text('删除所有指纹'),
+              ),
+              ElevatedButton(
+                onPressed: () async {
+                  int userId = 2;
+                  Map<String, dynamic> result = await _zhiwenPlugin.deleteOneFingerprint(userId);
+                  print(result);
+                },
+                child: const Text('删除单个指纹'),
+              ),
+              ElevatedButton(
+                onPressed: () async {
+                  Map<String, dynamic> result = await _zhiwenPlugin.identifyFingerprint();
+                  print(result);
+                },
+                child: const Text('识别指纹'),
+              ),
+              ElevatedButton(
+                onPressed: () async {
+                  Map<String, dynamic> result = await _zhiwenPlugin.getUserCount();
+                  print(result);
+                },
+                child: const Text('获取指纹总数'),
+              ),
+            ],
+          ),
+        ),
+      ),
+    ));
+  }
+}