Recent questions tagged dart

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dart - get height of a Widget using its GlobalKey in flutter

I am struggling getting the height of a Widget using its GlobalKey. the function that is getting the height is called after ... bold),), ); } } 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 - Openstreetmap in Flutter?

Can we use Openstreetmap in Flutter or can we only use Google Maps? I wanted to get another way to display a Map. ... Card and i dont have one. 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 - Close modal bottom sheet programmatically in flutter

I am displaying a BottomSheet via showModalBottomSheet<Null>() and inside several widgets with a GestureDetector. I would like 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 - What does Underscore "_" before variable name mean for Flutter

with reference to the Flutter tutorial, I encountered an underscore, _. I know that in Java, _ is used as a naming ... / Add this line. ... } 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: Firebase basic Query or Basic Search code

The main concept is showing document sor fields which contains the searched alphabet. The search bar gets the given ... more than a week, 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 - The best way to passing data between widgets in Flutter

I develop my own custom widget which is used in some other view. In this custom widget, I have one class ... to get other widget's state? 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 - Hiding FloatingActionButton

Is there any built in way in Flutter to hide a FloatingActionButton on ListView scrolling down and then showing it on scrolling up? 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 & Firebase: Compression before upload image

I want to send photo selected by user in my app to Firebase Storage. I have a simple class with property ... am ok with loss of quality. 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 - New Flutter Project wizard not showing on Android Studio 3.0.1

I installed Flutter following official document and also installed Flutter and Dart plugin on Android Studio. But, I ... issues in 1 category. See Question&Answers more detail:os...

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

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866 views

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dart - Use JS library in Flutter

I am trying to use Ether JS in my Flutter application. I know that it is not directly supported and even the ... . Any help will be appreciated. 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 - How to blend an image with a gradient colour?

I am attempting to replicate a login screen design my designer did for an app. The background image uses a blendMode ... "hacks" to achieve 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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dart - Disable a text edit field in flutter

I need to disable TextFormField occasionally. I couldn't find a flag in the widget, or the controller to simply make ... the best way to do 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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dart - Flutter : Vertically center column

How to vertically center a column in Flutter? I have used widget "new Center". I have used widget "new Center", but it does ... ), ], ), ), ); } 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: AutomaticKeepAliveClientMixin is not working with BottomNavigationBar

I have page called AddPatientView with BottomNavigationBar containing AddPatientInfo and AddPatientImages pages. All of these ... in the form? 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 scroll page in flutter

My code for a page is like this. i need to scroll part below appbar. @override Widget build(BuildContext context ... pixels on the bottom 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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997 views

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dart - Flutter - How does it work behind the scenes?

Obviously, flutter is a framework for running apps on iOS and Android using one codebase. But how does it manage ... I couldn't find anything. 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 change textField underline color?

I'm new to both flutter & dart. Currently, using this in one of my personal projects. In all of my form, ... 't get confused about those links. 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 use local flutter package in another flutter application?

How to use local flutter package in another flutter application? I created a package using following command: flutter ... not find the package 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 - Flutter One time Intro Screen?

I have an intro screen for my app, but it shows every time I open the app, I need to show that for ... ?? Please add the required code. 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 to create number input field in Flutter?

I'm unable to find a way to create an input field in Flutter that would open up a numeric keyboard. Is ... to find any documentation about 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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824 views

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dart - How to use CustomMultiChildLayout & CustomSingleChildLayout in Flutter

Can someone with experience in using CustomSingleChildLayout and CustomMultiChildLayout classes be able to explain in detail ( ... . Thank you! 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 - "extends" versus "implements" versus "with"

I want to understand the difference between extends, implements and with. When do I use each keyword? See Question&Answers more detail:os...

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

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1.4k views

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dart - Flutter position stack widget in center

I have widgets in a stack so I'd like to position my button bar in the bottom center of the stack ... tried every center alignment, please help See Question&Answers more detail:os...

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

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1.3k views

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dart - Flutter: Changing the current tab in tab bar view using a button

I am creating an app that contains a tab bar on its homepage. I want to be able to navigate to one of ... Here is a screenshot of my homepage. See Question&Answers more detail:os...

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

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901 views

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dart - Why 2.0 (the number 2.0) is double and int at the same time?

I just started to learn Dart and came across the below code main(){ print(2.0 is int); print(2.0 is ... here. Any pointers would help. Thanks. See Question&Answers more detail:os...

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

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886 views

1 answer

dart - How to remove a child component with a delete button in the child itself

I have an email component (email-tag.html) that consist of a label, a select and a delete button element. The ... I am asking for help. Thanks 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

1 answer

dart - How to create dropown list in flutter where data comes from API?

I need to display list of teachers name in the dropdown list and when I click teacher name it need to go to ... flutter how can I do this? See Question&Answers more detail:os...

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

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1.3k views

1 answer

dart - Firestore- Flutter array contains

I saw this and JavaScript supports 'array-contains' but what about flutter? Is there any way to query array ... Or flutter not support this? See Question&Answers more detail:os...

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

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