Flutter return null widget
WebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. WebApr 9, 2024 · Flutter ModalRoute returns a null value. I'm trying to send arguments while changing the page, here is the code: child: ListTile ( onTap: () { setState ( () { setSelectedTrack (index); }); Navigation.mainNavigation.currentState! .pushReplacementNamed ( '/', arguments: selectedTrack, ); On the other page ("/") I'm …
Flutter return null widget
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WebMar 9, 2024 · The problem in this case was that the OP didn't return anything from the builder, so just adding a return worked out fine. Some things to keep in mind when using FutureBuilder. Always check the snapshot.hasData property and return a UI accordingly. WebListView. class. A scrollable list of widgets arranged linearly. ListView (Flutter Widget of the Week) ListView is the most commonly used scrolling widget. It displays its children …
WebAug 9, 2024 · 1 Answer. If you're using Provider 4.1.0 or above you can use the parameter builder that let you use the provider above instead of using a Consumer (that forces you to return a Widget, so you can't use null), that way you can return null to the floatingActionButton and fire the animation when changes (predetermined to scaling) … WebNov 24, 2024 · A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior.
WebJun 1, 2024 · when returning from the form error message is : 'package:flutter/src/widgets/text.dart': Failed assertion: line ... pos... 'data!=null': A non-null String must be provided to a Text widget. flutter flutter-navigation flutter-form-builder Share Improve this question Follow edited Jun 1, 2024 at 6:51 Jitesh Mohite 29.5k 12 … WebJun 11, 2024 · This way you can also check if the request actually provides a result. Your _getImages function returns nothing. You need to return the result of your call. Future _getImages (String url) async { return await http.get (url).then ( (result) { return result.headers ['content-type']; }); }
WebNov 27, 2024 · A build function returned null. I/flutter ( 3647): The offending widget is: Builder I/flutter ( 3647): Build functions must never return null. To return an empty space that causes the building widget to I/flutter ( 3647): fill available room, return "new Container()". To return an empty space that takes as little room as I/flutter ( 3647 ...
WebMar 6, 2024 · 1 Answer. Sorted by: 8. Don't use the constructor. Instead use initState. class Foo extends State { @override void initState () { // widget is not null here } } … can i put a gif in an emailWebSep 20, 2024 · I am having a problem with that my Todolist that returns error message: "A non-null String must be provided to a Text widget. 'package:flutter/src/widgets/text.dart': Failed assertion: line 360 pos 10: 'data != null' " and its in class MyHomePage at line title: new Text (widget.title. can i put a gif on instagramWebJul 30, 2024 · if (result != null) { // does not catch Future with null content } Unfortunately, the Future (result) is only null if the Page PlayerNames () is never called, because pressing the Button which returns null, does not … can i put a greenhouse in my basementWebJun 19, 2024 · Correct Way: Widget build (BuildContext context) { return SizedBox.shrink (); } SizedBox.shrink () is a widget that is unlike Container or Material has no background or any decorations whatsoever. It sizes … five ingredient refrigerator sweet picklesWebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. five in hawaiianWebApr 8, 2024 · So far whenever I needed to use a conditional statement within a Widget I have done the following (Using Center and Containers as simplified dummy examples): new Center( child: condition == tru... can i put a gif as my desktop backgroundcan i put a gif in powerpoint