Flutter 自动填充不适用于文本字段

Question

对于任何类型的提示，我根本无法使 Flutter 自动填充工作。我复制了 Flutter 的示例代码，稍作修改。

  bool isSameAddress = true;
  final TextEditingController email = TextEditingController();
  final TextEditingController billingAddress1 = TextEditingController();
  final TextEditingController billingAddress2 = TextEditingController();

  final TextEditingController creditCardNumber = TextEditingController();
  final TextEditingController creditCardSecurityCode = TextEditingController();

  final TextEditingController phoneNumber = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return ListView(
      children: <Widget>[
        const Text('Email'),
        AutofillGroup(
          child: Column(
            children: <Widget>[
              TextField(
                controller: email,
                autofillHints: <String>[AutofillHints.email],
              ),
            ],
          ),
        ),
        const Text('Billing address'),
        Checkbox(
          value: isSameAddress,
          onChanged: (bool newValue) {
            setState(() { isSameAddress = newValue; });
          },
        ),
        // Again the address fields are grouped together for the same reason.
        if (!isSameAddress) AutofillGroup(
          child: Column(
            children: <Widget>[
              TextField(
                controller: billingAddress1,
                autofillHints: <String>[AutofillHints.streetAddressLine1],
              ),
              TextField(
                controller: billingAddress2,
                autofillHints: <String>[AutofillHints.streetAddressLine2],
              ),
            ],
          ),
        ),
        const Text('Credit Card Information'),
        // The credit card number and the security code are grouped together as
        // some platforms are capable of autofilling both fields.
        AutofillGroup(
          child: Column(
            children: <Widget>[
              TextField(
                controller: creditCardNumber,
                autofillHints: <String>[AutofillHints.creditCardNumber],
              ),
              TextField(
                controller: creditCardSecurityCode,
                autofillHints: <String>[AutofillHints.creditCardSecurityCode],
              ),
            ],
          ),
        ),
        const Text('Contact Phone Number'),
        // The phone number field can still be autofilled despite lacking an
        // `AutofillScope`.
        TextField(
          controller: phoneNumber,
          autofillHints: <String>[AutofillHints.telephoneNumber],
        ),
      ],
    );
  }

但是没有为任何类型的提示显示自动填充下拉列表。我在设备上打开了自动填充服务(使用 Google 的自动填充服务)，并且自动填充本身适用于其他应用程序。
代码有什么问题？是否缺少导致禁用自动填充的任何内容？
注意:我使用 Flutter 1.20.4 和 Android 10

Answer 1

我缺少的是这次迁移 https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects .值得注意的是，您的 MainActivity 需要扩展 io.flutter.embedding.android.FlutterActivity 而不是 io.flutter.app.FlutterActivity。
此外，正如您已经提到的，您需要在系统设置中配置自动填充服务。
工作示例代码:

  @override
  Widget build(BuildContext context) => Scaffold(
    appBar: AppBar(
      title: Text("Login"),
    ),
    body: AutofillGroup(
        child: Column(
      children: [
        TextField(
          autofillHints: [AutofillHints.email],
          keyboardType: TextInputType.emailAddress,
        ),
        TextField(
          autofillHints: [AutofillHints.password],
          keyboardType: TextInputType.text,
        ),
      ],
    )));

用户名而不是电子邮件应该类似地工作。