您可以执行此操作。看看这个： Fingerprint Authentication in Flutter

因此，您还需要在android清单文件中设置权限。

无论您使用的是哪种平台（抖动等），第三方应用程序都无法将生物识别材料注册/添加到设备中。这是流程的总体运行方式。

1. 用户获得了一部新手机（已购买，赠予，找到等），该手机支持生物特征认证。
2. 用户转到“设置”并注册生物识别模板（例如，注册其指纹作为解锁设备的一种方式）。通常，这是注册/注册指纹/面部/虹膜/等的唯一方法。
3. 您的应用希望用户使用生物识别技术进行身份验证，因此实现了类似于here或here所述的内容。

现在在您的应用程序内部，当用户单击到authenticate()时，您的应用程序实际上从未看到过任何生物识别材料。生物特征识别材料保存在安全的位置，以便第三方应用程序无法访问它们。您的应用程序从框架中获得的信息是，尝试向您的应用程序进行身份验证的指纹/面部/虹膜确实已在设备上注册。查看我提到的博客文章以获取更多详细信息。

这是我们的应用程序中指纹认证的代码和完整的例子

首先创建一个 FingerprintAuthentication 类

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:local_auth/auth_strings.dart';
import 'package:local_auth/local_auth.dart';
import 'package:lottie/lottie.dart';
import 'package:nb_utils/nb_utils.dart';
import 'package:prokit_flutter/main.dart';
import 'package:prokit_flutter/main/utils/AppColors.dart';
import 'package:prokit_flutter/main/utils/AppWidget.dart';

class FingerprintAuthentication extends StatefulWidget {
  static String tag = '/FingerprintAuthentication';

  @override
  _FingerprintAuthenticationState createState() => _FingerprintAuthenticationState();
}

class _FingerprintAuthenticationState extends State<FingerprintAuthentication> {
  final LocalAuthentication auth = LocalAuthentication();
  bool face = false;
  bool fingerprint = false;
  String _authorized = 'Not Authorized';
  bool _isAuthenticating = false;
  bool authorized = false;

  @override
  void initState() {
    super.initState();
    init();
  }

  init() async {
    await _getAvailableBiometrics();
  }

  @override
  void setState(fn) {
    if (mounted) super.setState(fn);
  }

  Future<void> _getAvailableBiometrics() async {
    List<BiometricType> availableBiometrics = await auth.getAvailableBiometrics();
    try {
      face = availableBiometrics.contains(BiometricType.face);
      fingerprint = availableBiometrics.contains(BiometricType.fingerprint);

      setState(() {});
    } on PlatformException catch (e) {
      print(e);
    }
  }

  Future<void> _authenticate() async {
    bool authenticated = false;
    try {
      setState(() {
        _isAuthenticating = true;
        _authorized = 'Authenticating';
      });

      authenticated = await auth.authenticateWithBiometrics(
        localizedReason: 'Scan your fingerprint to Login',useErrorDialogs: true,stickyAuth: true,iOSAuthStrings: IOSAuthMessages(
          cancelButton: 'cancel',goToSettingsButton: 'settings',goToSettingsDescription: 'Please set up your Touch ID.',lockOut: 'Please reenable your Touch ID',),androidAuthStrings: AndroidAuthMessages(
            signInTitle: "Fingerprint Authentication",fingerprintRequiredTitle: "Connect to Login",cancelButton: 'Cancel',goToSettingsButton: 'Setting',fingerprintSuccess: "Authentication Successfully authenticated"),);

      authorized = authenticated;
      setState(() {
        _isAuthenticating = false;
        _authorized = 'Authenticating';
      });
    } on PlatformException catch (e) {
      showDialog(
          context: context,builder: (BuildContext context) {
            return HandleError(
              code: e.code,message: e.message,);
          });
    }
    if (!mounted) return;

    final String message = authenticated ? 'Authorized' : 'Not Authorized';
    setState(() {
      authorized = authenticated;
      _authorized = message;
    });
    await Future.delayed(Duration(seconds: 3));
    setState(() {
      authorized = authenticated;
    });
  }

  void _cancelAuthentication() {
    auth.stopAuthentication();
  }

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
        appBar: appBar(context,'Fingerprint Authentication'),body: ListView(
          shrinkWrap: true,physics: BouncingScrollPhysics(),padding: EdgeInsets.all(16),scrollDirection: Axis.vertical,children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,children: [
                fingerprint
                    ? InkWell(
                        borderRadius: BorderRadius.circular(10),onTap: _isAuthenticating ? _cancelAuthentication : _authenticate,child: Container(
                          padding: EdgeInsets.all(16),decoration: BoxDecoration(
                            border: Border.all(color: appColorPrimary),borderRadius: BorderRadius.circular(10),child: Column(
                            crossAxisAlignment: CrossAxisAlignment.center,mainAxisAlignment: MainAxisAlignment.center,children: [
                              Icon(
                                Icons.fingerprint,color: appColorPrimary,size: 75,10.height,Text(
                                'Fingerprint',style: boldTextStyle(
                                  color: appColorPrimary,)
                            ],)
                    : InkWell(
                        borderRadius: BorderRadius.circular(10),onTap: () {
                          toast("Fingerprint not available");
                        },decoration: BoxDecoration(
                            border: Border.all(color: Colors.grey),child: Column(
                            children: [
                              Icon(
                                Icons.fingerprint,color: Colors.grey,style: boldTextStyle(
                                  color: Colors.grey,face
                    ? InkWell(
                        borderRadius: BorderRadius.circular(10),decoration: BoxDecoration(
                            borderRadius: BorderRadius.circular(10),border: Border.all(
                              color: appColorPrimary,child: Column(
                            children: [
                              Icon(Icons.face,size: 75),Text(
                                'Face',onTap: () {
                          toast("Face biometric is unavailable");
                        },border: Border.all(
                              color: Colors.grey,],authorized
                ? Lottie.asset(
                    'images/integrations/img/authentication.json',height: 250,width: 250,reverse: true,animate: mounted,repeat: false,)
                : SizedBox(),);
  }
}

创建一个 HandleError 类

  class HandleError extends StatelessWidget {
      final String code;
      final String message;
    
      HandleError({this.code,this.message});
    
      @override
      Widget build(BuildContext context) {
        return Dialog(
          child: Container(
            decoration: BoxDecoration(
              color: appStore.scaffoldBackground,shape: BoxShape.rectangle,borderRadius: BorderRadius.circular(0),width: MediaQuery.of(context).size.width,child: Column(
              mainAxisSize: MainAxisSize.min,crossAxisAlignment: CrossAxisAlignment.stretch,children: <Widget>[
                Container(
                  padding: EdgeInsets.all(8),child: Column(
                    children: [
                      Icon(
                        Icons.error_outline,color: Colors.white,Text(code.validate(),textAlign: TextAlign.center,style: boldTextStyle(size: 18,color: white)),Text(
                  message.validate(),style: secondaryTextStyle(),textAlign: TextAlign.justify,).paddingOnly(left: 8,right: 8),16.height,FlatButton(
                  onPressed: () {
                    finish(context);
                  },child: MaterialButton(
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(10),color: Colors.red,onPressed: () {
                      finish(context);
                    },child: (Text(
                      'Retry',style: boldTextStyle(color: Colors.white),)),);
      }
    }