I have installed Android Studio and flutter successfully. When I run flutter doctor in command prompt it gives me [all green ticks in these brackets].
The question is that after the creation of a new flutter project on the right-hand side of the screen under the project I am unable to see/locate any dart main file to write code. For further clarification, you can see the attached image below.
Unable to locate the dart file to write code in the project hierarchy:
I have 0 ideas what is still missing in the configuration of Flutter / Android Studio
Well, I figured out why pubspec.yaml and main.dart was not in my project due to the older version of flutter. I downloaded the latest version flutter_windows_2.2.2-stable, created a new flutter project, and included the flutter SDK path of flutter_windows_2.2.2-stable which resolved all my problems. Kindly, make sure whoever wants to start Mobile Application development in Android Studio + Flutter + Dart always download the latest version of everything.
Recent Experiment:
After downloading the latest version of Flutter still, I was unable to get the pubspec.yaml and main.dart files in my Android Studio Project, so the solution is below:
where you have extracted your flutter_windows_2.2.2-stable remember the directory path like E:\src\flutter_windows_2.2.2-stable which is in my scenario.
******************* CMD WORK *******************
Open cmd(Command Prompt) by default you will be in the directory like C:\Users\UserName\
Now go to the path E:\src and to navigate write E: hit enter, now you will be in the E: directory. Write cd E:\src hit enter.
type flutter create project_name ( make sure whenever you withe the name of the project it should be like this my_first_app in this format you name the projects with proper naming convention in flutter [word_word_word_word] ) then hit enter, wait for a while it will create a new flutter project for you including pubspec.yaml and main.dart files + necessary files to be imported.
Reference for naming convention in flutter (https://medium.com/flutter-community/file-and-folder-structure-in-flutter-967b8be3155e#:~:text=Flutter%20doesn't%20have%20a,letters%20and%20underscores%20between%20words.&text=When%20naming%20folders%2C%20you%20want,them%20very%20direct%20and%20clear.)
Right now after the creation of a project(Flutter) in Android Studio you are unable to see/locate the pubspec.yaml and main.dart files use cmd for the project creation which worked in my scenario.
Related
Hello experts I am facing very big issue I am made application in 2021 on flutter my application is still live on play store now I need update it, problem is that I updated my android studio flutter version 3.0. Now opening my old project which was made in 2021 after opening it my pubspec.yaml file is missing in the project, I don't no how to recover that file or repair it. They have a lot of dependencies included there is pubspec.lock file available but not pubspec.yaml please please help me i am in big check screen shot below
if i use flutter create command i am getting this errors
You can create a pubspec.yaml file on root directory or open the bottom terminal and try flutter create . it will provide default structure. Now to get pub package, check the import section and add on pubspec.yaml
If you have a backup then paste the pubspec.yaml file from it. Else take a backup of the project. Run flutter create . in the root directory. It will create the pubspec file in the project. Click on configure dart and add the flutter path then run the project. It will throw errors for the packages used manually enter packages in pubspec or you can try flutter pub add <packagename>
So i am installing both version of flutter, version 2 and, 1.22.6 , i want to build apk for my 1.22.6 project, but flutter automatically call the version 2 for building apk, this create error, what should i do?
Try using this Flutter version manager
You can create alias for Flutter and point to different version
for example
flutter will call flutter 1.22.6
flutterd will call flutter 2 instead
so when you want to build for 1.22.6 just use flutter
I have write a article, sadly in Thai not translate yet, how to have 2 different version of Flutter and how to make alias to call different version here
https://medium.com/kbtg-life/%E0%B8%A3%E0%B8%B9%E0%B9%89%E0%B8%88%E0%B8%B1%E0%B8%81-flutter-2-0-%E0%B8%81%E0%B8%B1%E0%B8%99%E0%B8%A3%E0%B8%B6%E0%B8%A2%E0%B8%B1%E0%B8%87-%E0%B9%81%E0%B8%A5%E0%B9%89%E0%B8%A7%E0%B8%97%E0%B8%B3%E0%B8%A2%E0%B8%B1%E0%B8%87%E0%B9%84%E0%B8%87%E0%B9%83%E0%B8%AB%E0%B9%89%E0%B9%80%E0%B8%84%E0%B8%A3%E0%B8%B7%E0%B9%88%E0%B8%AD%E0%B8%87%E0%B9%80%E0%B8%A3%E0%B8%B2%E0%B8%A1%E0%B8%B5%E0%B8%97%E0%B8%B1%E0%B9%89%E0%B8%87-2-%E0%B9%80%E0%B8%A7%E0%B8%AD%E0%B8%A3%E0%B9%8C%E0%B8%8A%E0%B8%B1%E0%B8%99-de861c810d57?source=your_stories_page-------------------------------------
so after you this, you can just run
flutter build
I also faced same problem in the past. So what I did was, I downloaded both versions of flutter say (flutter2.2 and flutter1.22). And I have kept them in same folder. Now if I want to use flutter 2.2 then I'll rename "flutter2.2" folder to "flutter" and If I want to use flutter1.2 then I'll rename the "flutter1.2" folder to "flutter"
In the environment variable path I have set the path to "flutter/bin" so if I rename flutter2.2 to flutter then my environment variable will automatically take 2.2 version.
You may need to restart your PC after changing the version.
The simple way is:
Download the version of Flutter you need and put it in the place where Flutter is installed
In this directory you have "flutter" folder.
In Ubuntu, it is usually located in this path:
/home/username/development/flutter
To develop the software with the desired version, just change the desired folder name to "flutter".
For example :
flutter --> flutter-2.x.x
flutter-3.x.x ---> flutter
This error appears when I try to add language support to my flutter application:
Target of URI doesn't exist: 'package:flutter_gen/gen_l10n/app_localizations.dart'. Try creating the file referenced by the URI, or Try using a URI for a file that does exist.
I’m using flutter_localizations, the project is built with dart 2.7.0
It seems that flutter_localizations needs latest sdk which is dart 2.13.0
How can I fix this?
I had this same issue with import 'package:flutter_gen/gen_l10n/app_localizations.dart' in Visual Studio Code after updating to Flutter 2.5.
After closing the VS Code window and reopening it, the error was gone.
If that doesn't work, try closing and opening VS Code again.
Or restart the Dart Analysis Server by going to View > Command Palette and then typing Dart: Restart Analysis Server.
Credit goes to https://stackoverflow.com/a/68150402/4797855 and https://stackoverflow.com/a/68731436/4797855.
Open Command Palette and select Dart: Restart Analysis Server.
Just type in the project terminal flutter gen-l10n it will solve your problem.
Also, in the pubspec.yaml file, enable the generate flag. This is added to the section of the pubspec that is specific to Flutter, and usually comes later in the pubspec file.
# The following section is specific to Flutter.
flutter:
generate: true # Add this line
just in Your terminal run this
flutter pup add flutter_gen/gen_l10n
It fixed my app
I had this issue before, and I tried to solve it by adding charts_flutter to my pubspec.yaml but it didn't solve my.
Lucky me, charting library recently released a new version which is compatible with flutter 2.5. I didn't need to add anything to my pubspec(I removed chart_flutter from my ). just run the app even if the compiler shows an error saying Target of URI doesn't exist for the import line. The system is going to generate that file on runtime.
Be sure that there's an l10n.yaml file in your project root as follows.
Example
Demonstration variables
foldername = l10n
defaultIntlFile = intl_en.arb
importFileName = app_localizations.dart
Import
import 'package:flutter_gen/gen_l10n/importFileName';
l10n.yaml
arb-dir: lib/foldername
template-arb-file: intl_en.arb
output-localization-file: app_localizations.dart
Structure
lib/foldername/defaultIntlFile
The solution in my case:
"If you are using a package flutter_gen you need to remove it from pubscpec.yaml to resolve conflict." credit Target of URI doesn't exist: 'package:flutter_gen/gen_l10n/gallery_localizations.dart'
I'm slowly building my personal website over at dlblack.dev, and I'm trying to spice it up a little bit. For example, from a computer (rather than a tablet or phone since they don't have mouse pointers), if you hover over any of the clickable items, it doesn't change your mouse pointer to indicate it's clickable, and the clickable object doesn't change at all. I've decided to follow this FilledStacks tutorial, but it doesn't mention anything about fixing this problem.
Essentially what's happening is when I get ~2.5 mins through the tutorial video (where he writes the skeleton extension class) and try to duplicate it, VS Code redlines almost the entire class declaration aside from the name. What I'm writing is the exact same thing as what he has on screen at 2:26, and here's my code:
import 'package:flutter/material.dart';
import 'dart:html' as html;
extension HoverExtension on Widget{
}
"extension", "on", and "Widget" are all redlined when I do this. When I hover over "extension", it says the following:
Undefined class 'extension'.
Try changing the name to the name of an existing class, or creating a class with the name 'extension'. dartundefined_class
This requires the 'extension-methods' language feature to be enabled.
Try updating your pubspec.yaml to set the minimum SDK constraint to 2.6 or higher, and running 'pub get'. dart(experiment_not_enabled)
The first thing I did was change my minimum SDK constraint to 2.6.0 in my pubspec.yaml file. I then changed it to 2.7.0 because a lot of people online say extensions were released in Dart 2.7. I've done a lot of Googling on the subject but no one seems to have the same problem as me: I have no analysis_options.yaml file. I created one, and put only this in its contents:
include:
analyzer:
enable-experiment:
- extension-methods
linter:
In theory, I believe that should fix my problem once I run flutter pub get from the command line in my root folder; it doesn't. I have no idea what's wrong. Any suggestions?
In Android Studio solving this problem requires three steps:
Update SDK version in pubspec.yaml (must be 2.6.0 or higher)
environment:
sdk: ">=2.7.0 <3.0.0"
Tools -> Flutter -> Flutter Clean
Close project and reopen it (eg. File -> Close project)
For the changes in pubspec.yaml and analysis_options.yaml to take place, you have to restart the Dart Analysis Server. In VSCode, that's as simple as Ctrl+Shift+P -> Reload Window.
I had to do flutter clean, then close and re-open VSCode.
I had a similar problem with the "extensions" feature in Dart (on Windows) ... I was getting "undefined class", and the message saying that I needed to use the "experimental" Dart settings. It seems that I had two Dart installations, one in "c:\Program Files" and one in "c:\tools\dart-sdk". I removed the version under "Program Files". I also ran "choco uninstall dart-sdk" and "choco install dart-sdk", and made sure that the version was correct (using "dart --version") after the install. The command "where dart" should display "c:\tools\dart-sdk-bin-dart.exe" after the choco install. When I went back into my Flutter project (using Android Studio) it said that I didn't have Dart support for my project, and I just had to enter the Dart SDK location.
if tombroz's solution won't work then
1.Tools -> Flutter -> Flutter Clean
2.Tools -> Flutter ->Pub get
3.File -> Invalidate cache/Restart -> Invalidate cache and Restart
I just had to run flutter clean et voila.
I'm extremely frustrated right now after I updated Android Studio to have the latest Flutter and Dart Plugins. Now it tells me "No FLutter SDK configured" and when I give it the SKD path it just says, "Flutter SDK Is Not Found In The Specified Location." The Dart plugin works fine.
I have looked for an answer for hours and nothing works. I've downloaded the NDK, flutter doctor works perfectly, and I've tried set the SDK path to pretty much every file inside my flutter folder (inside /Documents).
Any tips?
Go to - Configure -> Tools > SDK Manager > Android SDK > SDK Tools, and search for flutter. You will get flutter SDK for Android.
If you are using Visual studio, also install plugins for flutter in Visual Studio.
» Steps:
Download Flutter SDK: Here
Extract Flutter:
tar xf ~/Downloads/flutter_linux_v1.7.8+hotfix.4-stable.tar.xz
Path export for particular terminal:
export PATH="$PATH:`pwd`/flutter/bin"
Permanent Path export:
Open bashrc file: Go to home directory terminal -> nano ~/.bashrc
Write at end of file:
export PATH=" [PATH_Where_Flutter SDK Extracted] /flutter/bin:$PATH"
example: export PATH="/home/sid/0_aaa_iauro/Flutter/s/flutter/bin:$PATH"
Run the following command to see if there are any dependencies you need to
install to complete setup:
flutter doctor -v
Add Flutter extension to vs-code.
Locate Flutter SDK.
Make New project in flutter:
flutter create Project_name
» Important Links:
Linux Install
Getting Started with Flutter on Linux for Android [Beginner Tutorial]
How To Install And Setup Flutter On Ubuntu 18.04.1 LTS (Bionic Beaver)
Part 2-A: Install Flutter in Windows – Step by Step Guide
Check for path variable (bashrc file):
Flutter – Step by Step Installation on Linux – Ubuntu
If you are using a fresh new Android Studio install as me, try installing missing packages for SDK support in Android Studio as described here: https://ladwhocodes.blogspot.com/2019/02/fix-flutter-sdk-not-found-in-specified-location.html
Go to Menu > Tools > SDK Manager > Android SDK (left side of the dialog) > SDK Tools (tab).
Select 'Support Repository' and 'NDK' checkboxes.
Click OK.
It will prompt you to install some dependencies. Install them.
What happen to me was because there is a space in my android sdk path (which is my username). I copy to C:\android\sdk and problem gone. Probably the space cause issue to NDK thus affect to Flutter sdk.
in my case, it was caused by local changes to the flutter git repo. On command line, everything worked, but in Android Studio it failed to detected the flutter sdk which caused all flutter commands to fail (even though flutter bin dir is in my path). The local changes were probably caused by trying out the beta version of flutter and returning to stable afterwards.
solution: delete flutter dir and redownload (I actually reverted all changes using the git clean command)