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FLUTTER QUESTIONS

Flutter: Get coordinates from a Path for x
Flutter: Get coordinates from a Path for x
it should still fix some issue I found it out by myself. Calling path.computeMetrics().first returns a PathMetric object. Then you can call getTangentForOffset(offset)to get the Tangent at that given offset.
TAG : flutter
Date : January 12 2021, 09:11 PM , By : dexteryy
How to save last opened screen in flutter app
How to save last opened screen in flutter app
like below fixes the issue Demo
TAG : flutter
Date : January 12 2021, 09:11 PM , By : Pieter Taelman
TextFormField increase height with proper alignment
TextFormField increase height with proper alignment
should help you out I'm trying to make my TextFormField 'bigger'. I tried this code, it does make it bigger, but if I type (here: qwerty) it starts in the middle. Is there an option to start in the left upper corner? , You can try this.
TAG : flutter
Date : January 12 2021, 09:11 PM , By : Josh
how to set default date to first Sat after today in flutter
how to set default date to first Sat after today in flutter
seems to work fine As I conclude from your question, here are your requirements :how to :
TAG : flutter
Date : January 12 2021, 09:11 PM , By : Ron
How to make delay 1 second before execute some function?
How to make delay 1 second before execute some function?
seems to work fine You aren't checking for the ConnectionState. The example at https://api.flutter.dev/flutter/widgets/StreamBuilder-class.html will show you how to display an intermediate message while the Stream is still loading.
TAG : flutter
Date : January 12 2021, 09:11 PM , By : Laques
Convert int32 to bytes List in dart
Convert int32 to bytes List in dart
will help you The easiest approach would be to create a byte list (Uint8list), then view the underlying buffer as a 32-bit integer list (Int32List) and store the integer there. That will allow you to read back the bytes.
TAG : flutter
Date : January 12 2021, 07:00 PM , By : browe
How do I change the color around the FAB that's center docked in the custom bottom app bar?
How do I change the color around the FAB that's center docked in the custom bottom app bar?
I hope this helps . I think you can wrap it in a container or other placeholder widget and set a background color. Don't know if this works for sure. Let me know! Greetz edit: just checked my answer, if you implement this (example) code:
TAG : flutter
Date : January 12 2021, 07:00 PM , By : Pieter Taelman
Error: Function Claims that it does not Return Anything
Error: Function Claims that it does not Return Anything
wish of those help I have created this function using dart and the flutter framework that returns a widget: , In your 2nd else if you forgot to use return
TAG : flutter
Date : January 12 2021, 01:40 AM , By : Allen
Determine if one Map is a subset of another Map
Determine if one Map is a subset of another Map
fixed the issue. Will look into that further You can get each MapEntry of subset candidate and check if original map contains the same value. If value is a collection, then it has to be compared using DeepCollectionEquality.Here is my code:
TAG : flutter
Date : January 12 2021, 01:40 AM , By : chorn
How to add a border/corner radius to a LinearProgressIndicator in Flutter?
How to add a border/corner radius to a LinearProgressIndicator in Flutter?
may help you . For exact your needs follow this dependency https://pub.dev/packages/percent_indicatorTry this template code
TAG : flutter
Date : January 11 2021, 05:14 PM , By : jumpingmattflash
Declaring a Styles file in Flutter
Declaring a Styles file in Flutter
Does that help For the import part, you can use one of the below, they have the same meaning:
TAG : flutter
Date : January 11 2021, 03:32 PM , By : Mario Tristan
How do I change specific properties of an existing TextStyle?
How do I change specific properties of an existing TextStyle?
Any of those help You can use TextStyle.copyWith for this. This will copy the parameters from your other text style and only changes the ones you supply. In your case it would looks like this:
TAG : flutter
Date : January 11 2021, 03:32 PM , By : yossi
How often is the build method called?
How often is the build method called?
this will help Why The build method is called any time you call setState, your widget's dependencies update, or any of the parent widgets are rebuilt (when setState is called inside of those).
TAG : flutter
Date : January 11 2021, 11:39 AM , By : user118656
How to yield inside callback function?
How to yield inside callback function?
should help you out Please read this bloc fragment: , You already presented the best way to do it and here is why:
TAG : flutter
Date : January 10 2021, 02:06 PM , By : Grace Jones
Flutter onPressed() vs onTap()
Flutter onPressed() vs onTap()
wish help you to fix your issue In my experience, onTap() is used for any gesture capture and onPressed() especially for buttons. Just like in real life, when you have to use a button, you'll press it.Hope this will solve your troubles even though I'
TAG : flutter
Date : January 10 2021, 02:06 PM , By : Saurabh
Adding some space between TableRows in Flutter
Adding some space between TableRows in Flutter
will help you Probably not the most efficient way but you can wrap the TableRow in a Padding Class
TAG : flutter
Date : January 10 2021, 02:06 PM , By : user183442
Flutter : NoSuchMethodError: The method 'showSnackBar' was called on null
Flutter : NoSuchMethodError: The method 'showSnackBar' was called on null
it should still fix some issue I got some problem with showSnackbar; I get an error: , You've forgot to set key property:
TAG : flutter
Date : January 08 2021, 10:52 AM , By : Jorge Palacio
flutter - create stack from a list
flutter - create stack from a list
To fix this issue You don't need ListView to achieve it.Instead you put all child widgets into Stack and wrap them into Positioned widget, which will allow you to control their position.
TAG : flutter
Date : January 08 2021, 03:18 AM , By : Theo
How to use JWT with WebSocketChannel in Flutter
How to use JWT with WebSocketChannel in Flutter
help you fix your problem You are trying to send an object on the socket I think it is not happy with that. The server may not be able trop properly handle the error of receiving something other than a json string and closes the connection.Try this t
TAG : flutter
Date : January 08 2021, 03:18 AM , By : Marie Ramos
create a username validator without spaces
create a username validator without spaces
hop of those help? how do I create a validator for the username, so when the user fills in the username and there is a space then there is an alert ?? right now my code is like this , You might want to use .contains() method.For example:
TAG : flutter
Date : January 08 2021, 03:18 AM , By : Arun Thomas
Adding multiple resolution background
Adding multiple resolution background
wish help you to fix your issue Flutter docs has it all covered. Please check the following link:Adding assets and images
TAG : flutter
Date : January 08 2021, 03:18 AM , By : SachinJadhav
Refresh indicator doesn't work when list doesn't fill the whole page
Refresh indicator doesn't work when list doesn't fill the whole page
hope this fix your issue Set the physics to AlwaysScrollableScrollPhysics just like the below code.
TAG : flutter
Date : January 07 2021, 03:08 PM , By : Waynew
Space text in row but only based on one child widget
Space text in row but only based on one child widget
help you fix your problem You can try to use Expanded() to have same width for the Row() children. No need to use spaceAround.
TAG : flutter
Date : January 07 2021, 07:50 AM , By : Stone
How to change the Status Bar color in Flutter when we are using an AppBar?
How to change the Status Bar color in Flutter when we are using an AppBar?
I hope this helps . I want to define a specific color myself and not let the AppBar do it automatically?
TAG : flutter
Date : January 06 2021, 03:27 AM , By : Sergio Rudenko
How can I go back to the previous page with flutter_webview on button click?
How can I go back to the previous page with flutter_webview on button click?
will help you I did it! =DIt might look simple to lots of people haha, but for someone who never touched this kind of stuff before, I'm very proud of my ninja Ctrl C + Ctrl V. Just kidding, I looked at loads of exemples and tried this and it workd, i
TAG : flutter
Date : January 05 2021, 11:29 AM , By : s8k
How to prevent the back button from returning previous page
How to prevent the back button from returning previous page
Hope this helps For disabling the back button you can wrap your widget with WillPopScope.
TAG : flutter
Date : January 03 2021, 08:18 AM , By : Kyle
Flutter : how to left aligned a checkbox
Flutter : how to left aligned a checkbox
I wish this help you You can use CheckboxListTile widget which has property called controlAffinity. Setting it to leading will make the checkbox left aligned. Below is sample working code:
TAG : flutter
Date : January 03 2021, 08:18 AM , By : Will
Flutter: increase the size of the SwitchListTile icon
Flutter: increase the size of the SwitchListTile icon
may help you . If you only want to increase the size of the switch icon, you can wrap SwitchListTile with Transform.scale, but the scale would be applied to entire widget, ie, to the text as well, that messes up the size of entire SwitchListTile widg
TAG : flutter
Date : January 03 2021, 08:18 AM , By : delphiace
How to get the type of something in Dart?
How to get the type of something in Dart?
I wish did fix the issue. _typeOf isn't part of the language. You have to implement it yourself.It's fairly straightforward:
TAG : flutter
Date : January 03 2021, 08:18 AM , By : meehan
How to deserialize Firestore document with its id using json_serializable in Flutter?
How to deserialize Firestore document with its id using json_serializable in Flutter?
it helps some times You could modify the fromJson constructor, so that you'd provide the id on the first parameter.
TAG : flutter
Date : January 03 2021, 08:18 AM , By : user179190
SingleChildScrollView not working with multiple components in a Column - flutter
SingleChildScrollView not working with multiple components in a Column - flutter
help you fix your problem In the buildContent wrap your IncomeTransaction() into Expanded:like Expanded(child: IncomeTransaction()).
TAG : flutter
Date : January 03 2021, 08:18 AM , By : Ganesh
(UPDATE: How to store List<String> data type in sqflite) sqflite error: DatabaseException(java.lang.String cannot
(UPDATE: How to store List<String> data type in sqflite) sqflite error: DatabaseException(java.lang.String cannot
This might help you You have to flatten your model. See the supported types help section.Basically int, double, String and Uint8List(blob) are the only types supported. Unfortunately you have to convert your inner List and Map, json being one solutio
TAG : flutter
Date : January 02 2021, 10:54 PM , By : user170635
Flutter: add flavors configuration into Visual Studio
Flutter: add flavors configuration into Visual Studio
help you fix your problem You can pass additional arguments using a launch.json. If you don't already have one, click the Cog icon in the Debug sidebar and then select Flutter in the snippet-completion list. You can then add an args section, like thi
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Puneet Madaan
how to set cursor position at the end of the value in flutter in textfield?
how to set cursor position at the end of the value in flutter in textfield?
seems to work fine I've been having the same problem with setting a TextEditingController and this is what worked for me.
TAG : flutter
Date : January 02 2021, 06:48 AM , By : TC.
Flutter - Basics for building a game
Flutter - Basics for building a game
I wish this helpful for you There are a few tutorials around this.Have a look at the following
TAG : flutter
Date : January 02 2021, 06:48 AM , By : user161380
How to show Icon in Text widget in flutter?
How to show Icon in Text widget in flutter?
Does that help Flutter has WidgetSpan() to add a widget inside the RichText().Example use:
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Morbo
Flutter Stream Builder Triggered when Navigator Pop or Push is Called
Flutter Stream Builder Triggered when Navigator Pop or Push is Called
I hope this helps . I spend hours figuring out how to fix this. Turns out AppHomePage need to extend StatefulWidget instead of StatelessWidget.No idea why, but it works.
TAG : flutter
Date : January 02 2021, 06:48 AM , By : John Phipps
Flutter DraggableScrollableSheet - how to expand/collapse programmatically
Flutter DraggableScrollableSheet - how to expand/collapse programmatically
seems to work fine You can reset the position of the DraggableScrollableSheet to its initialChildSizeby using the DraggableScrollableActuator. Therefore you need to have the BuildContext, which is given to you by the DraggableScrollableSheet builder-
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Suresh S
Flutter-About the number of reads when creating a chat app in Cloud Firestore
Flutter-About the number of reads when creating a chat app in Cloud Firestore
hope this fix your issue Since you use a stream, the Firebase client keeps an active observer between the client and the server. For the first 30 minutes after starting this observer that means it'll only need to synchronize the delta, so whatever do
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Senthil
How can I implement video playback in flutter web?
How can I implement video playback in flutter web?
With these it helps I've detailed here a solution that uses the Afterglow video player.You can replace this with any HTML/JS video player of your choice, the approach would be the same.
TAG : flutter
Date : January 02 2021, 06:48 AM , By : chorn
How can i get width and height of Text?
How can i get width and height of Text?
around this issue Actually Text is widget and get height and width of any widget in flutter you have to use GlobalKey and assign it to our Widget.
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Phil Austin
Set height of child elements equal to highest other element that are contained by Wrap Widget (Flutter)
Set height of child elements equal to highest other element that are contained by Wrap Widget (Flutter)
wish helps you What you need is InstrinsicHeight widget. Here is an example of how to solve your problem for any given number of cards in row. As you can see the _generateRows(List labels, int numPerRow) function gets a collection of card labels and
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Gazza
flutter dart try catch, catch does not fire
flutter dart try catch, catch does not fire
wish help you to fix your issue given the short code example below: , Functions can throw anything, even things that aren't an Exception:
TAG : flutter
Date : January 02 2021, 06:48 AM , By : BinaryBoy
Gestures in Stack blocked
Gestures in Stack blocked
should help you out The trick is to actually have the Map on top of the Stack so that it always reacts to gestures, and to change the layout when the ScrollView is scrolled so that visually the ScrollView goes on top of the Map. Try out the code belo
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Alex
How to fix the error caused: pub get failed(69)
How to fix the error caused: pub get failed(69)
I hope this helps . I'm having a problem to run the application for Flutter. , This is happening due to unwanted space in the below code
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Mike
Hero animation producing RenderBox overflow
Hero animation producing RenderBox overflow
Any of those help I found this issue on Github, so I added this property to the Hero Widget:
TAG : flutter
Date : January 02 2021, 06:48 AM , By : PatrickSimonHenk
Configured the default Firebase app __FIRAPP_DEFAULT
Configured the default Firebase app __FIRAPP_DEFAULT
around this issue In my particular workflow, when adding firebase dependencies, the tutorial code and flutter warnings never prompted to modify the AppDelegate.m file. It wasn't until I dialed back and added cloud_firestore did I get prompted with th
TAG : flutter
Date : January 02 2021, 06:48 AM , By : lietkynes
What does pub in flutter stands for
What does pub in flutter stands for
wish help you to fix your issue the title basically says it! What does pub in flutter stands for? the rest of this sentence is just top meet the question minimum characters , From the description meta tag:
TAG : flutter
Date : January 02 2021, 06:48 AM , By : user177910
How to automatically scroll a PageView with some delay that is made without using a builder?
How to automatically scroll a PageView with some delay that is made without using a builder?
should help you out You need to add a PageController to your PageView. Then on initState() you can start a Timer.periodic() where you just jump from page to page. Like this:
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Tim
ListView.builder somehow caches in a wrong way
ListView.builder somehow caches in a wrong way
this will help Your keys are the same for each item. It confuses Flutter, because it uses the key to figure out which UI element was for which widget. Try changing your keys to a unique value for each list item. Here's one pass towards that goal, may
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Alan Little
dart + flutter: why doesn't the compiler recognize type mismatches
dart + flutter: why doesn't the compiler recognize type mismatches
will help you What happens, in reality, is an implicit cast.Since UnmodifiableListView is a List, assigning List to UnmodifiableListView does an automatic cast.
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Eniac
In-consistent divider color
In-consistent divider color
To fix the issue you can do I'm facing a problem where the divider color's is not as it is supposed to be. So I have 2 dividers. Both of them are Colors.white: , you can also use Divider
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Der Ketzer
How to correctly do type conversions in dart
How to correctly do type conversions in dart
I wish this help you A CastMap is a subtype of Map so that isn't a problem here. It's comparable to a situation where you specify a return type of num and the concrete value you return is an int.The issue you're going to hit is that when you read a v
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Hitesh Prajapati
How to refresh previous screen/page list when come back from a page in flutter?
How to refresh previous screen/page list when come back from a page in flutter?
it should still fix some issue You can await for Navigator.of(context).push (which could also receive return value from second page Navigator.of(context).pop(value)) and then setState(() {}); in first page context to make it refresh.In your example i
TAG : flutter
Date : January 02 2021, 06:48 AM , By : user171752
Bring screen to the top of navigator
Bring screen to the top of navigator
I hope this helps . I have been searching for a while and i could not find any option to do this. Is this even possible? , Yes you can back go back from Page4 to Page2
TAG : flutter
Date : January 02 2021, 06:48 AM , By : hyperNURb
Flutter dynamic height of ListView
Flutter dynamic height of ListView
it fixes the issue You are using Flexible widget, that's why your ListView expands. You have to change Flexible to ConstrainedBox and add shrinkWrap: true to your ListView.
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Simon Hogg
How can I create a Drawer below status bar in Flutter?
How can I create a Drawer below status bar in Flutter?
I think the issue was by ths following , For this kind of scenario, Flutter has the SafeArea widget. This widget will make sure that nothing is rendered e.g. beneath the status bar, i.e. a padding is added.To apply this to your Drawer, you can simply
TAG : flutter
Date : January 02 2021, 06:48 AM , By : gorbiz
Refreshing token in Flutter
Refreshing token in Flutter
I hope this helps . You can use Future.delayed to refresh the token before the expiration.You can also run this part of code in background with background processes but your application must be in background.
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Kaputnik
Too many positional arguments, 0 expected, but 3 found
Too many positional arguments, 0 expected, but 3 found
wish help you to fix your issue The problem here is that you are using named parameters for your Notification class but pass positional parameters.You have two options to solve it:
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Pavel K.
How to use flutter provider in a statefulWidget?
How to use flutter provider in a statefulWidget?
Does that help When using Provider for state management you don't need to use StatefullWidget, so how can you call a method of the ChangeNotifier on start of the app?You can simply do that in the constructor of the ChangeNotifier, so that when you po
TAG : flutter
Date : January 02 2021, 06:48 AM , By : Atanas

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