build a form with validation in Flutter project

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 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

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How to Get SHA-1 key in Android Studio for Firebase.

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 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

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[SOLVED] Unhandled Exception: Navigator operation requested with a context that does not include a Navigator.

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 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,

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How to Check if an application is on its first run or One time Intro Screen with Flutter.

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now If you wish to show the intro screen only for the first time, you will need to save locally that this user has already seen intro. For such thing you may use Shared Preference. There is a flutter package Shared Preferences which you can use. Please refer to the below complete tested code to understand how

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[SOLVED] Flutter : NoSuchMethodError: The getter ‘isEmpty’ was called on null.

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 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

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[SOLVED] Flutter Error: The getter ‘body1’ isn’t defined for the class ‘TextTheme’ – place_picker.

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 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’.

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Scaffold class in Flutter with Examples

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 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

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Query builder for beginners in Laravel project

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now Laravel’s database query builder provides a convenient, fluent interface for creating and running database queries. It can be used to perform most database operations in your application and works perfectly with all of Laravel’s supported database systems. The Laravel query builder uses PDO parameter binding to protect your application against SQL injection attacks. There

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failed to open stream: Permission denied in /opt/lampp/htdocs

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 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

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type ‘int’ is not a subtype of type ‘string’ in Flutter

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 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

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Retrive data from laravel API to flutter app

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now To retrieve data from a Laravel API in a Flutter app, you can follow these general steps: Step: 1 Set up your Flutter project: Create a new Flutter project or use an existing one. Step: 2 Add dependencies: Open the pubspec.yaml file in your Flutter project and add the http package as a dependency.

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How to use a double cupertino switch on one page in flutter

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now To use a double Cupertino switch on a page in Flutter, you can follow these steps: Step 1: Add the Cupertino package to your pubspec.yaml file: Import the necessary packages in your Dart file: Create a StatefulWidget for your page. This will allow you to maintain the state of the switches: Define the state

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How to open Page Route in New Tab in Flutter Web

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now To open a new tab or browser window in a Flutter application, you can make use of the url_launcher package. This package allows you to launch URLs and open them in the default browser on the device. First, make sure you have added the url_launcher package to your pubspec.yaml file: Then, you can use

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How To display an “Incorrect email or password” message when the login response is unauthorized in Flutter

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now To display an “Incorrect email or password” message when the login response is unauthorized in Flutter, you can follow these steps: Step: 1 Create a variable in your login page’s state to hold the error message. For example: Step: 2 In your login function or login button’s onPressed callback, make the login request to

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How to Make TextField widget Read Only in Flutter App

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now In this example, we are going to show you the way to make TextField() widget read only. Sometime you may need to show your text in TextField with read only attribute. See the example below to make text field read-only on Flutter app. To make TextField() read only: Use readOnly property of TextField() to make TextField read

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Email Validation In the Flutter

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now Before sending the user’s input to the server, email validation is the best practice. We should check the email address to see if it is valid or not and display it to the user. For verifying the email address, we can use a regEx pattern, which is a little more complex to construct. Instead

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Creating First Flutter application in Android studio

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now In this article, we are going to learn about how to create a Flutter application in Android studio. These are the steps to follow. 3. Select Flutter Application as the project type. Then click Next. 4. Configure the application details as shown below and then click NextProject name: Give your application name.It must be written in lower case &

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How to order in Laravel high to low, low to high products – by price with this code?

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now To order products in Laravel by price in either high to low or low to high, you can use the orderBy the method provided by Laravel’s query builder. Here is an example code snippet that you can use to order products in Laravel by price in descending or ascending order: In the above code

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how password reset in Flutter with API Laravel in Flutter

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now I am resetting a password in Flutter with an API built with Laravel. This example assumes that you have already set up the necessary endpoints in your Laravel API and that you are using the Flutter http package to make HTTP requests. Flutter code for sending a password reset request: Laravel code for generating

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failed to open stream: Permission denied in /opt/lampp/htdocs

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now I am using Linux 16.04 & xampp 5.6.30. I am trying to create a simple login program using file with validation but I am facing problem while putting my data into a file named “login.txt”. Error This error is due to file permissions. The php/apache user does not have the permissions to write in

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