如何将flutter datepicker值获取到文本字段？

Question

如何获取文本字段的抖动日期选择器值？当我单击文本字段时，它会在选择日期后弹出日期选择器。我想成为文本字段中的那个日期

还。

我想自定义日期选择器的颜色

     onTap: () {
       FocusScope.of(context).requestFocus(new FocusNode());
       showDatePicker(
       context: context,
       initialDate: DateTime.now(),
       firstDate: DateTime(2019, 1),
       lastDate: DateTime(2021,12),
        );
       },

Answer 1

我修复您的代码如下（您可以从 DatePicker 中选择日期，您可以自定义 DatePicker 的主题）：

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';

class TestPickerWidget extends StatefulWidget {
  @override
  _TestPickerWidgetState createState() => _TestPickerWidgetState();
}

class _TestPickerWidgetState extends State<TestPickerWidget> {
  DateTime _selectedDate;
  TextEditingController _textEditingController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: TextField(
          focusNode: AlwaysDisabledFocusNode(),
          controller: _textEditingController,
          onTap: () {
            _selectDate(context);
          },
        ),
      ),
    );
  }

  _selectDate(BuildContext context) async {
    DateTime newSelectedDate = await showDatePicker(
        context: context,
        initialDate: _selectedDate != null ? _selectedDate : DateTime.now(),
        firstDate: DateTime(2000),
        lastDate: DateTime(2040),
        builder: (BuildContext context, Widget child) {
          return Theme(
            data: ThemeData.dark().copyWith(
              colorScheme: ColorScheme.dark(
                primary: Colors.deepPurple,
                onPrimary: Colors.white,
                surface: Colors.blueGrey,
                onSurface: Colors.yellow,
              ),
              dialogBackgroundColor: Colors.blue[500],
            ),
            child: child,
          );
        });

    if (newSelectedDate != null) {
      _selectedDate = newSelectedDate;
      _textEditingController
        ..text = DateFormat.yMMMd().format(_selectedDate)
        ..selection = TextSelection.fromPosition(TextPosition(
            offset: _textEditingController.text.length,
            affinity: TextAffinity.upstream));
    }
  }
}

class AlwaysDisabledFocusNode extends FocusNode {
  @override
  bool get hasFocus => false;
}

并且您还必须在 pubspec.yaml 中添加 Intl 依赖项：

dev_dependencies:
  flutter_test:
    sdk: flutter
  intl: ^0.16.1

最后在您的主文件中调用 TestPickerWidget 进行测试。

Answer 2

尝试这个。首先，您需要定义一个 TextEditing 控制器。然后您可以访问该控制器来设置所选日期。

这是您可定制的日期选择器。

showDatePicker(
  context: context,
  initialDate: DateTime.now(),
  firstDate: DateTime(2019, 1),
  lastDate: DateTime(2021,12),
  builder: (context,picker){
    return Theme(
    //TODO: change colors
    data: ThemeData.dark().copyWith(
      colorScheme: ColorScheme.dark(
        primary: Colors.deepPurple,
        onPrimary: Colors.white,
        surface: Colors.pink,
        onSurface: Colors.yellow,
      ),
      dialogBackgroundColor:Colors.green[900],
     ),
     child: picker!,);
   })
   .then((selectedDate) {
     //TODO: handle selected date
     if(selectedDate!=null){
       _controller.text = selectedDate.toString();
     }
 });

您可以尝试此实时预览。

Answer 3

你可以这样使用

showDatePicker(
                context: context,
                initialDate: DateTime.now(),
                firstDate: DateTime(2019, 1),
                lastDate: DateTime(2021, 12),
              ).then((pickedDate) {
                //do whatever you want
              });