Question 75658 in Flutter Question posted in
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The lower bound of "sdk: '>=2.1.0 <3.0.0'" must be 2.12.0 or higher to enable null safety – Flutter

Hi how this problem solvedenter image description here

I added the widget "dropdown_formfield: ^0.1.4" to my project and it showed this error How can I fix this problem please help. This package : https://pub.dev/packages/dropdown_formfield

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2

Answers


  1. 0

    You must update your flutter/dart version like this (in your pubspec.yaml):

    environment:
  sdk: ">=2.18.0"

    Be prepared to make changes on your project/code due null safety

    Or seek to find a lower version of that "dropdown_formfield" that can be supported by your actual flutter/dart version.

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  2. 0

    write

    any keyword

    instead of ^0.1.4

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