无法解决货币中的数字格式？

如何解决无法解决货币中的数字格式？

我试过 NumberFormat "#,##0.##"

我试过 NumberFormat "#,##0.00"

我试过 NumberFormat "#,##0.#0"

我想要的格式是 (123,4567.89)

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

class CurrencyFormat extends TextInputFormatter {
  @override
  TextEditingValue formatEditUpdate(
      TextEditingValue oldValue,TextEditingValue newValue) {
    // TODO: implement formatEditUpdate
    if (newValue.selection.baseOffset == 0) {
      return newValue;
    }
    double value = double.parse(newValue.text);
    final money = NumberFormat("#,###.##","en_US");

    String newText = money.format(value);

    return newValue.copyWith(
        text: newText,selection: TextSelection.collapsed(offset: newText.length));
  }
}

我在 textformfield 小部件中调用此货币格式

'''
Widget mrpTextField() {
    return Padding(
      padding: const EdgeInsets.all(8.0),child: TextFormField(
        keyboardType: TextInputType.number,inputFormatters: [
          FilteringTextInputFormatter.digitsOnly,CurrencyFormat()
        ],controller: _mrp,validator: (value) {
          if (value.isEmpty) {
            return "MRP";
          }else if (value.length > 6) {
            return "";
          }
          return null;
        },decoration: InputDecoration(
          labelText: "Enter MRP",),maxLines: null,);
  }
'''

解决方法

在 TextFormField 中将 FilteringTextInputFormatter.digitsOnly, 更改为 FilteringTextInputFormatter.allow(RegExp("[0-9\.]")),

在CurrencyFormat

  class CurrencyFormat extends TextInputFormatter {
  @override
  TextEditingValue formatEditUpdate(
      TextEditingValue oldValue,TextEditingValue newValue) {
    if (newValue.text.isEmpty) {
      return newValue.copyWith(text: '');
    } else if (newValue.text == ".") {
      return newValue.copyWith(
        text: '0.00',selection: TextSelection.collapsed(offset: 2),);
    } else {
      NumberFormat f = NumberFormat("#,###0.00","en_US");
      double newNumber = 0;
      if ((!newValue.text.contains(".")) && oldValue.text.contains('.')) {
        String tempString = newValue.text.replaceAll(f.symbols.GROUP_SEP,'');
        tempString = tempString.substring(0,tempString.length - 2) +
            "." +
            tempString.substring(tempString.length - 2);
        newNumber = double.parse(tempString);
      } else {
        newNumber = double.parse(newValue.text
            .replaceAll(f.symbols.GROUP_SEP,'')
            .replaceAll("..",'.'));
      }
      String newString = f.format(newNumber);
      int cursorPosition = 0;
      if (oldValue.text.length > newString.length) {
        cursorPosition = -1;
      } else if (oldValue.text.length < newString.length) {
        cursorPosition = 1;
      } else {
        if (oldValue.text.replaceAll(f.symbols.GROUP_SEP,'').length >
            newValue.text.replaceAll(f.symbols.GROUP_SEP,'').length) {
          cursorPosition = -1;
          if (newString == "0.00" && oldValue.selection.baseOffset == 0) {
            newString = "";
          }
        } else if (oldValue.text.replaceAll(f.symbols.GROUP_SEP,'').length <
            newValue.text.replaceAll(f.symbols.GROUP_SEP,'').length) {
          cursorPosition = 1;
        } else if (oldValue.selection.extentOffset >
            oldValue.selection.baseOffset) {
          cursorPosition =
              oldValue.selection.baseOffset - oldValue.selection.extentOffset;
          newString =
              newString.substring(0,oldValue.selection.baseOffset - 1) +
                  newString.substring(oldValue.selection.baseOffset + 1);
          newNumber = double.parse(newString
              .replaceAll(f.symbols.GROUP_SEP,'')
              .replaceAll("..",'.'));
          newString = f.format(newNumber);
          if (newString == "0.00" && oldValue.selection.baseOffset == 0) {
            newString = "";
          }
        }
      }
      return TextEditingValue(
        text: newString,selection: TextSelection.collapsed(
            offset: oldValue.selection.extent.offset +
                cursorPosition +
                (f.symbols.GROUP_SEP.allMatches(newString).length -
                    f.symbols.GROUP_SEP.allMatches(oldValue.text).length)),);
    }
  }
}

再说一次，"#,###0.00" 是对的