[ERROR: flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: type ‘List’ is not a subtype of type ‘FutureOr’

Error Solution: It looks like the error you’re encountering is due to a type mismatch between the return type of your getDoctors function and the expected return type when setting the doctors state. You’re trying to set a list (List) to the doctors state, but the function is declared to return a Future. To resolve this issue, you should update your getDoctors function to return a List instead of a Future. Here’s the modified code: Your code ought to function

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Form Validation in Flutter

Every application needs to have form validation. There are other ways to validate forms in the flutter application, for as by utilising a TextEditingController. However, managing text controllers for each input can get complicated in large applications. As a result, Form offers us a practical method for verifying user inputs. Although the condition is applied in each TextFormField with a widget name validator as shown in the example below, the input is validated in your submit function (the method that

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List of Popular Guest Websites and Link Buildings

Link building is still an essential tactic for boosting website visibility and authority in the dynamic world of digital marketing and search engine optimization (SEO). The realm of link building and guest posting, including details on what each term entails, tips for carrying them out successfully, and a directory of well-known websites where you can engage in these activities. What is Link Building? A fundamental SEO strategy called link building aims to get other websites to link to yours (or

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No version of NDK matched the requested version in flutter >> Solved.

I was attempting to link Firebase with my Flutter app using the SHA1 key.Several projects started failing independently after switching to Android Gradle plugin 3.6.0 (published on February 24, 2020), with the following error: Version 20.0.5594570 of the NDK was not available. Locally accessible versions are 21.0.6113669.It’s very easy to “fix” this locally by installing the previous version of the expected ndk: ndk;20.0.5594570 in the sdkmanagerI want to know, though, where and how this previous version is specified. And how

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[SOLVED] Flutter: Cannot run with sound null safety, because the following dependencies don’t support null safety

Problem I’m using flutter_recaptcha_v2: ^0.1.0. Now, I am trying to run it using flutter run, however, it will not start because of the following error: Solution If you want to run your project with –no-sound-null-safety so now you add this line to your main. dart file in the top(first line) with a comment. // @dart=2.9 Then run your project.

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[SOLVED] Error: “Bottom Overflowed” error caused by the keyboard.

You get the error message “Bottom overflowed by 67 pixels” when the keyboard appears. Technically speaking, the viewport’s size was decreased, which led to an overflow in our layout. Look at the picture below:- The widgets inside the scaffold might be prevented from resizing when the keyboard opens, although this could result in some widgets being hidden by the keyboard. The Scaffold widget’s resizeToAvoidBottomInset attribute can be used to do this. The Column widget can also be contained within a

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Flutter, Try correcting the name of an existing method, or defining a method named flat button, raised button

Error: Try correcting to the name of an existing method, or defining a method named ‘OutlineButton’ in flutter 3.0.0. it isn’t defined for the type Solution 1: Yes. That is a breaking change. And it is listed up top in the breaking changes documentation: The FlatButton, RaisedButton and OutlineButton widgets have been replaced by TextButton, ElevatedButton, and OutlinedButtonrespectively. source Flutter – The method ‘forEach’ isn’t defined for the type, The method ‘forEach’ isn’t defined for the type ‘Object’. Try correcting

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How to Add Input Section to Mobile App in Flutter using dart packages?

I’ll describe how to add an input section to a mobile app in Flutter in this article. So, for this blog, I’m going to open main.dart in the VS Code editor, create a programme, and import “package:flutter/material.dart” import Next, I construct a headline like “Happy Journey” using StatelessWidget, a theme, and the primarySwatch colour blue for the theme. Then, I make a button using RaisedButton and an input area with the aid of InputDecoration decoration, adding a few stylistic classes,

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Error – Dart SDK is not configured in Android Studio.

The Dart SDK is not set up.First, check to see if your flutter framework SDK path is set whenever you encounter this error. My system does not have it configured. I will now demonstrate how to set up the Flutter SDK path. then your Dart SDK will be configured immediately. You must first install both plugins, such as Flutter and Dart. Let’s look at the steps below. First, open the File menu. Step 1 : Go to File MenuStep 2: Press

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[SOLVED] Error: Your app isn’t using AndroidX.

I used Windows’ Visual Studio Code to create a flutter app. When I run the project, a notice appeared saying, AndroidX is not used by your app.You may easily migrate your app by following the instructions on https://goo.gl/CP92wY to prevent any build failures. However, while creating the Android project study and its APK with Flutter, an error occurred. So here is the answer: Step 1. Go to Android folder of your project. Step 2. Open gradle.properties File. Step 3. Paste the Below Code in the file. android.useAndroidX=trueandroid.enableJetifier=true

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What is the difference between stateless and stateful widgets? >>Flutter.

I hope it will be helpful to you as well. I am learning Dart/Flutter and attempting to comprehend how the Widgets system works. In reality, there are three types of widgets, not simply two. Stateful Vs stateless Stateless Widget A constant is similar to a stateless widget. It is unchangeable. A stateless widget must be recreated if you want to modify what is displayed by it. Stateless widgets are in handy when the component of the user interface you are

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How to add Images in Flutter.

Make an image folder inside an assets folder, and if necessary, generate assets. Flutter Image_directory This should be in your root folder, and you can also find a pubspec.yaml file there. pubspec.yaml In order to update some lines in this file, open it in your vscode editor and make the necessary modifications. To this after this just use your images in your code after including child image function.

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How to Create a Login Form In Flutter using Dart packages?

I’ll describe how to develop a login form in flutter using the dart package in this blog. Therefore, I’ll open “lib/main.dart” in an editor before I create a project and import- importing ‘package:flutter/material.dart’ Use a stateless widget after that for the title and colour. the use of stateful widgets for complete functionality and design after that. With the aid of InputDecoration, I am using a background image in this application to create a card within a container. I’m making two

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[SOLVED] Flutter: Cannot run with sound null safety, because the following dependencies don’t support null safety

Problem Flutter_recaptcha_v2: 0.1.0 is what I’m using.I am currently attempting to execute it using flutter run, but it is failing with the following error: Solution You need now add this line to your main if you want to run your project with the –no-sound-null-safety option.First line of the dart file is a comment. // @dart=2.9 then run your project.

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

Problem When I call an API, the response comes back as Variable Data ($data). When data arrives, there is no error; but, when I receive null as a response, I receive the error Unhandled. Exception: The getter ‘isEmpty’ was called on null, resulting in a NoSuchMethodError. The code below is giving me an error when I use it: Solution Due to the fact that $data returns null, I’ve used If (data?.isEmpty?? true), then ? avoids an error if the expression’s

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[Solved] Flutter : [core/not-initialized] Firebase has not been correctly initialized. Have you added the “google-services.json” file to the project?

Problem I’ve connected my Flutter app to Firebase by adding the SHA1 key ( How to Get SHA-1 key in Android Studio for Firebase. ) and package name in the Firebase console, and also downloaded and provided google-service.json in my Flutter app at android/app. But when I run the app it’s Showing an error that I’ve not provided google-service.json a file in my app. The Error Says – Solution After hours of struggle, I am able to figure out the solution. First, add the ‘google-services.json‘ plugin as

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