Recent questions tagged Dart

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dart - copy project / folder flutter to another computer

I copied a project that I am developing in the notebook to my desktop computer, but the path where the ... desktop. enter image description here See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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894 views

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dart - How do I prevent an on.submit event from changing/reloading the page?

In Javascript when I provide an onSubmit function, and I return 'false' from the function, it prevents the ... and changing/reloading the page? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to Loop through a list of elements

My question is very simple, how can i create a loop that will loop a simple list of elements. List li= ... want to create this simple animation. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to detect TabBar change in Flutter?

I need to detect TabBar when I swipe then print somethings on console, how I can do that? This is my code. ... Icons.settings)), ], ) ), See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - Check if asset exist in flutter

How I can check if a specific asset exists in Flutter. I'm trying to load some images and sound files and I ... ) does not exist in the assets. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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dart - How can I do public key pinning in Flutter?

I want to the pin the public key of my server so that any request made to the server has to have that public ... can I do the same with Flutter? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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840 views

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dart - Dynamically create polymer element

I have defined login element as follows: <polymer-element name="my-login" extends="form"> <template> ...< ... that extends other HTML element? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How do I check type of an object in a switch/case?

I see in examples this code: if (obj is User) { // do something } I want to check the type of the object ... to check the type of the object? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - Flutter: Send JSON body for Http GET request

I need to make a GET request to an API from my Flutter app which requires request body as JSON (raw). I ... for Http GET request in Flutter? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - Flutter button with custom shape - (triangle)

I've created a circular button which in this case is RawMaterialButton and I'm trying to use CustomPaint to ... circular button with a triangle. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to set border radius to bottom app bar in a flutter app?

I want to set the borderRadius to an Bottom Navigation App Bar as its shown in the image. I have tried to put ... onTap: _onItemTapped), ); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to delete a Firebase Storage file with flutter?

I'm new to both Flutter and Firebase, so bear with me on this one. I am trying to delete a File in my ... and you would need to change it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.4k views

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dart - How do I fix "No pubspec.yaml file found" in flutter?

I am using Windows 10 with VS Code, although I also tested it on PowerShell, and both produced the same result: ... Beta 3, it finally worked. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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dart - Change TextField's Underline in Flutter

I'm working on an application using Flutter SDK. When I use a TextField widget, and I focus it, the underline ... , , not the label color. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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907 views

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dart - Combine/merge multiple maps into 1 map

How can I combine/merge 2 or more maps in dart into 1 map? for example I have something like: var firstMap = {"1":"2"}; ... "1":"2", "1":"2"}; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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dart - Flutter video_player dispose

I'm using provider with video_player to manage the state. VideoProvider has: videoPlayerController = VideoPlayerController. ... causes an error. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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884 views

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dart - How to add Polyline on Google Maps Flutter Plugin?

I'm using the official Google Maps Flutter plugin to show maps and it works perfectly well but now I want to ... only need to add the Polylines. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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dart - How to get the claims from a JWT in my Flutter Application

I am writing a Flutter/Dart application and am getting a JWT back from an auth server that has some ... "modern" Dart/Flutter application? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to save to web local storage in flutter web

I have a web site built with flutter for web and currently, am trying to save to web local storage or cookie ... plugin or way to archive that. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

dart - How to style AlertDialog Actions in Flutter

I use this method to show a AlertDialog: _onSubmit(message) { if (message.isNotEmpty) { showDialog( context: ... how to style the buttons? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.5k views

1 answer

dart - Flutter - Conditional library import in flutter-web

Supposing that audioplayers|lib/audio_cache.dart worked only on Android/iOS, I conditionally exclude the following import from ... : 'sounds/'); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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dart - Flutter: Shared Preferences null on Startup

Problem: Shared preference bool value is null on startup even though I have given it a value if prefs.getBool(' ... false/true is then printed. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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975 views

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dart - How can I show a snackbar after navigator.pop(context) in Flutter?

We need close one screen and open a second screen. And show snackbar on the second screen from first screen. ... has already been listened to. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - "$ flutter build web" is throwing the error "Missing index.html"?

When I run: $ flutter build web I'm getting the error Missing index.html. The flutter app is displaying in the ... I debug, or fix this problem? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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851 views

1 answer

dart - Can i put List into SharedPreferences in Flutter?

Can I put ArrayList or List object to SharedPreferences in Flutter? Cause I just realized that flutter haven't ... list of my favorite books. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.5k views

1 answer

dart - Flutter How to refresh StreamBuilder?

Consider the following code: StreamBuilder<QuerySnapshot> _createDataStream(){ return StreamBuilder<QuerySnapshot>( stream: Firestore ... }, ), See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

dart - How to take screenshot of widget beyond the screen in flutter?

I am using RepaintBoundary to take the screenshot of the current widget which is a listView. But it only ... be captured in multiple images. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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910 views

1 answer

dart - how to get data from firebase in flutter

I am building a flutter app and using cloud-firestore, this is how my database looks like I want a function that retrieves ... , ); }, ); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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