Category "flutter"

Flutter: [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: PlatformException

I am new in Flutter.I face a problem about [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: PlatformException. This is my Debug Console: Launch

Suddenly can't fetch any data inside firebase firestore, after trying to use tutorial that contain firestore emulatore

i tried following some of youtube tutorial video and saw a firestore emulators connect. but after i connect the app. the screen that works properly suddenly don

How to make Tree Select Box with DropdownButton in flutter

I want to make a Select box with DropDownButton in Flutter. but I can not make a perfect algorithm for it. I hope to receive great help from Flutter experts. Th

How to insert firebase storage images inside firestore field

I have a problem in my flutter app , and the problem is in the storage of firebase . I have a collection with field called avatar(String). It's value comes from

Mongodb Node.js Express how should the learning ranking be and what do they do

1 - how should the learning ranking be (Mongo db,Node.js,Express) 2 - is it only available for the web or is it also available for mobile? 3 - What do they do

Flutter Hive save custom object with list of custom objects gone after restarting app

I am using the Hive- Package in my project to store some data locally. That has been working fine so far, but now I am facing an issue: I have a Custom-Class wh

The argument type 'Serializer<dynamic>' can't be assigned to the parameter type 'Serializer<SingleItemType>'

I am using built_value for serialisation, Initially the code had been working fine, however since I upgraded to null safety I have been getting this error The a

Flutter RawKeyboardListener listening twice?

What I am trying to achieve is when viewing this widget, the RawKeyboardListener starts listening straight away when the TextField is not selected/in focus. It

Multiple Dependent dropdown in flutter

I am trying to build multiple dependent dropdown on flutter. The second one depend on 1st one. here is the code to the dropdown I have implemented. Container(

How to add a name to a chart on flutter, x- and y-axis?

I have been working with the online gallery of Flutter charts (https://google.github.io/charts/flutter/gallery.html) but I'm struggling to add a title for x &am

how can i use more than one tflite flutter model?

i created one tflite model. i want to pass string to model and label according to user selection. for example, if your select model1 it will load model two, if

painting house using custom paint

I have an svg image with its path and i wanna create a listener and paint on a specific path which i have clicked or selected it. Color _fillColor = Colors.cyan

Flutter - How to make custom rounded shape tab indicator with fixed height?

I want to make an indicator with a rounded shape like the below image. I tried a lot for it but I can't make it a shape like a design. And also tell me how

How to specify a TimeZone when creating a DateTime object in Dart/Flutter?

Dart?flutter does not appear to allow a timezone (eg: "Australia/Sydney" or "America/Detroit") to be specified when creating a DateTime object. Either the local

Problem with Flutter fastlane with flavors

Has anyone used fastlane with flutter and two flavors? I have a flutter application with two schemes App_A and App_B. I am trying to configure fastlane for conf

This requires the 'super-parameters' language feature to be enabled

I am using super keyword in initState method.but i am getting this error 'This requires the 'super-parameters' language feature to be enabled. Try updating your

Flutter Scaffold Appbar not showing the back button

My class is not showing the back button in the AppBar, Already try put this.automaticallyImplyLeading = true, import 'package:carros/pages/carro/carro.dart';

How to create a modal bottomsheet with circular corners in Flutter?

showModalBottomSheet does not provide any styling or decorations. I want to create something like the Google Tasks bottomsheet.

Call async function from Isolate function

I am trying to call an async function from the Isolate function. class IsolateExample { final ReceivePort port = new ReceivePort(); IsolateExample(){

Widget rebuild after TextField selection Flutter

I'm developping a Flutter App that needed to have a form. So when the user open the app, a Splash Screen appear before the form that have the following code :