Recent questions tagged dart

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dart - How to shift focus to next textfield in flutter?

I am new to Flutter. I am building a form with multiple text inputs using following widgets: Form, TextFormField. The ... it to be in keyboard. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - Flutter: BottomNavigationBar rebuilds Page on change of tab

I have a problem with my BottomNavigationBar in Flutter. I want to keep my page alive if I change the tabs. here ... issue? Thank you a lot Albo See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to align single widgets in Flutter?

I want to align a Flutter widget within its parent. I know that I can center a widget by wrapping it ... align the OutlineButton icon in Flutter See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - Listview filter search in Flutter

I was wondering how to make the search function works according to the index of my ListView? So for instance ... (ticketresponse.body); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - Flutter Navigation pop to index 1

I am recursively adding routes to the navigator. There could be 20 views or more. Pop works as advertised, but I would ... (context); }, ), ), See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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620 views

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dart - How do I disable a Button in Flutter?

I'm just starting to get the hang of Flutter, but I'm having trouble figuring out how to set the enabled state of ... on how to do it. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - how to animate collapse elements in flutter

How can i expand and collapse widget when user taps on different widget ( sibling or parent ) with animation ... ( horizontal ) widget. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to pass data from child widget to its parent

I've the below custom widget that make a Switch and reads its status (true/false) Then I add this one to my main app ... new Switchy(); //... } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to set Custom height for Widget in GridView in Flutter?

Even after specifying the height for Container GridView, my code is producing square widgets. class MyHomePage extends ... shown on the right? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to make a full screen dialog in flutter?

I want to make a full screen dialog box. Dialog box background must be opaque. Here is an example: How to make like this in Flutter? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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713 views

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dart - How to work with progress indicator in flutter?

I'm newbie in flutter and wanted to know what is better way to add CircularProgressIndicator in my layout. ... working with flutter? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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798 views

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dart - How can I add a border to a widget in Flutter?

I'm using Flutter and I'd like to add a border to a widget (in this case, a Text widget). I tried TextStyle ... didn't see how to add a border. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - how to download/create pdf through webview in flutter

I have created a webviewscaffold but can't download anything from it while browsing from the webview, I made ... work like any other browser. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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847 views

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dart - Default stringify for objects, equivalent to Java's toString?

I have just take a look at the 3o tutorial from dart, creating the rating component. I was wondering if ... method. Is this possible? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to check if Flutter Text widget was overflowed

I have a Text widget which can be truncated if it exceeds a certain size: ConstrainedBox( constraints: ... private with the underscore. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to open DropdownButton when other widget is tapped, in Flutter?

I need to have a DropdownButton's list of options open/show programmatically when some other widget is tapped. I ... a further away button etc. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - Flutter Test MissingPluginException

Running tests which rely on the SharedPreferences Plugin always result in MissingPluginException(No implementation found for ... of a plugin? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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844 views

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dart - Flutter Back button with return data

I have an interface with two buttons that pop and return true or false, like so: onPressed: () => Navigator. ... there a way to accomplish this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - Flutter Load Image from Firebase Storage

I see there are a lot of examples on how to upload an image using flutter to firebase storage but nothing on ... of the image stored in Storage? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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735 views

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dart - Emit the data to parent Widget in Flutter

I'm trying to set the text from child widget to parent widget. But the text is not reflecting in parent widget. ... } } Am i missing something ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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768 views

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dart - How to clear Flutter's Build cache?

There seems to be a problem with flutter's build. I always need to perform RUN > Flutter Full Restart ... already performed a full rebuild. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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851 views

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dart - Flutter SVG rendering

I tried adding an image with a SVG source to my flutter application. new AssetImage("assets/images/candle.svg")) ... an SVG picture in Flutter? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dart - How to convert Flutter color to string and back to a color

I am converting a Color to a String. I am then converting the Color to a String. Unfortunately when I want to ... :core Color is from dart:ui See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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dart - How to enable Null-Safety in Flutter?

I tried to use null safety, but it's giving me this error: This requires the 'non-nullable' language feature to be ... stable, 1.22.3, ... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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913 views

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dart - Textfield validation in Flutter

I am working on Flutter TextField widget. I want to show an error message below the TextField widget if the ... not TextFormField in this case. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

1 answer

dart - Flutter: Filter list as per some condition

I'm having a list of Movies. That contains all Animated & non Animated Movies. To identify whether it's Animated or not there ... " ), ), ); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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851 views

1 answer

dart - How to make HTTP POST request with url encoded body in flutter?

I'm trying to make an post request in flutter with content type as url encoded. When I write body : json. ... Encoding.getByName("utf-8")); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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883 views

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dart - How do I build different versions of my Flutter app for qa/dev/prod?

I am building a Flutter app, and I have variables with different values for different environments (QA, dev, ... prod, and other environments? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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