You must update your flutter/dart version like this (in your pubspec.yaml): In order to enable null safety, the lower bound of the SDK version should be 2.12.0 or higher. The provided requirement, “sdk: ‘>=2.1.0 <3.0.0′”, does not meet this criteria, as the minimum required version is 2.12.0. To enable null safety, you should update the SDK version to at least 2.12.0. environment: sdk: “>=2.7.0 <3.0.0” You must update your flutter/dart version like this (in your pubspec.yaml): Be prepared to make

Create an image folder inside an assets folder, create assets if not exist. Flutter Image_directory This should be in your root folder, in that same root directory you will find a pubspec.yaml file , pubspec.yaml your need to make some changes on this file open it in your vscode editor, and change some lines like shown below. To this after this just use your images in your code after including child image function.

The SHA1 key to integrate firebase in my flutter app.After updating to Android Gradle plugin 3.6.0 (released Feb 24, 2020), several project independently started failing with: and i got this error It’s quite simple to “fix” this locally by installing the older expected ndk version: However, my question is: Where and how is this older version specified? And how do I update it so it matches the latest version 21.0.6113669? After some Research I found the solution.. I am assuming the machine you are using

Convert double to int Convert int to double How to convert List to int type in flutter Dart convert int variable to string use For loop using split to data type convertion Convert double to int To convert a double to int in Dart, we can use one of the built-in methods depending on your need: toInt( ) or truncate( ): these 2 methods are equivalent, they both truncate the fractional/decimal part and return the integer part. round( ): return

Flutter Forms Forms are an integral part of all modern mobile and web applications. It is mainly used to interact with the app as well as gather information from the users. They can perform many tasks, which depend on the nature of your business requirements and logic, such as authentication of the user, adding user, searching, filtering, ordering, booking, etc. A form can contain text fields, buttons, checkboxes, radio buttons, etc. Creating Form Flutter provides a Form widget to create a form.

There are two methods of getting SHA-1 key, but First one is not working for Windows user. So, if you are a Windows user then go for 2nd Method. Update:- On Android Studio Latest version(on 24 Sept 2021) 2020.3.1 for Windows 64-bit (912 MiB), Step 2 will not Work. So, go for Step 3. 1. Using Keytool Open a terminal and run the keytool the utility provided with Java to get the SHA-1 fingerprint of the certificate. You should get both the release and debug certificate fingerprints. To get the release certificate

This happens because when you do Navigator.of(context), it will start from the widget associated to the context used. And then go upward in the widget tree until it either find a Navigator or there’s no more widget. So, it throws an Error Navigator operation requested with a context that does not include a Navigator. So, how do I fix it ? First, let’s reproduce this error : This example creates a button that attempts to go to ‘/’ on click but

Problem I’m Calling An API and getting response in Variable Data ($data). When data is coming then there is no Error but when I’m getting null as response then getting this error Unhandled Exception: NoSuchMethodError: The getter ‘isEmpty’ was called on null. When I am using the below code then it is throwing me an error: Solution That is because $data returns null, So I’ve Used if(data?.isEmpty ?? true) ? prevents an error if the previous part of the expression results in null and ?? true results in true if the

Error /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/place_picker-0.9.19-nullsafety/lib/widgets/rich_suggestion.dart:35:89: Error: The getter ‘body1’ isn’t defined for the class ‘TextTheme’. – ‘TextTheme’ is from ‘package:flutter/src/material/text_theme.dart’ (‘/C:/src/flutter/packages/flutter/lib/src/material/text_theme.dart’). Try correcting the name to the name of an existing getter, or defining a getter or field named ‘body1’. TextSpan(text: boldText, style: style.copyWith(color: Theme.of(context).textTheme.body1!.color)), ^^^^^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/place_picker-0.9.19-nullsafety/lib/widgets/search_input.dart:60:65: Error: The getter ‘body1’ isn’t defined for the class ‘TextTheme’. – ‘TextTheme’ is from ‘package:flutter/src/material/text_theme.dart’ (‘/C:/src/flutter/packages/flutter/lib/src/material/text_theme.dart’). Try correcting the name to the name of an existing getter, or defining a getter or field named ‘body1’. Icon(Icons.search,

Scaffold is a class in flutter which provides many widgets or we can say APIs like Drawer, Snack-Bar, Bottom-Navigation-Bar, Floating-Action-Button, App-Bar, etc. Scaffold will expand or occupy the whole device screen. It will occupy the available space. Scaffold will provide a framework to implement the basic material design layout of the application.  The class Hierarchy is as follows: Object ↳ Diagnosticable ↳ Diagnosticable Tree ↳ Widget ↳ StateFul Widget ↳ Scaffold Constructor of the Scaffold class:  Properties of Scaffold Class:   Example: In this example, we have displayed the text Welcome

The error message you provided indicates that there is a permission issue preventing the Laravel application from opening and appending to the specified log file. This error commonly occurs when the web server or the user running the web server process does not have sufficient permissions to write to the file. To resolve this issue, you can follow these steps: This command adds write permissions for the owner of the file, which in this case is the web server user.

The error message you mentioned, “type ‘int’ is not a subtype of type ‘string’ in Flutter,” typically occurs when you try to assign an integer value to a variable or property that expects a string value. To resolve this issue, you need to ensure that you are assigning a string value instead of an integer value where it is expected. Here are a few common scenarios where this error may occur and their potential solutions: Assigning an integer to a