I created a new Button Class. This button has a Timer, which is normally gray and changes color after 5 seconds. When tapped, it turns gray again and changes color after 5 seconds. I want to reset the counter (_counter=0) to change the color, but I don’t know how to do it. This is my code. class… Read More About the function of the new button I created
I tried to publish my app to the app store with [appollo](https://github.com/Appollo-CLI/Appollo) but it failed. I got an e-mail from Apple with the following error message : ITMS-90078: Missing Push Notification Entitlement – Your app appears to register with the Apple Push Notification service, but the app signature’s entitlements do not include the ‘aps-environment’ entitlement.… Read More Missing push notification entitlement while publishing iOS app with Appollo
first, flutter`s version is 1.0, second, is this a sdk of dart? >Solution : Version is your app version, for example if user went to mobile setting they would see 1.0.0 in front of your app name. Sdk is you refer to your dart sdk. for example if you are using a package, you can… Read More What does this mean in pubspec file of flutter?
When I add date picker then show ‘Non-nullable instance field ‘selectedDate’ must be initialized. ‘ error DateTime selectedDate; void showDatePicker() { showCupertinoModalPopup( context: context, builder: (BuildContext builder) { return Container( height: MediaQuery.of(context).copyWith().size.height * 0.25, color: Colors.white, child: CupertinoDatePicker( mode: CupertinoDatePickerMode.date, onDateTimeChanged: (value) { if (value != null && value != selectedDate) setState(() { selectedDate =… Read More When I add date picker then show 'Non-nullable instance field 'selectedDate' must be initialized. ' error
I have a json file from where I am collecting only email addresses, and want to print index number base output like 3rd record’s email address to Text widget.. class _HomeScreenState extends State<HomeScreen> { List<String> list = []; Future<List<String>> getcomments() async { Uri url = Uri.parse(‘https://jsonplaceholder.typicode.com/posts/1/comments’); var response = await http.get(url); if (response.statusCode == 200)… Read More get data from json based on index number in flutter
I have tried to remove these codes. flutter_icons: android: true ios: true image_path: "1024.png" adaptive_icon_foreground: "512.png" flutter_native_splash: android: true ios: true image: "A.png" The app still works successfully. So, is it safe to remove these? >Solution : These are tools to generate app icon and splash screen, so yes it is safe after generate those… Read More Flutter: Is it safe if I remove the code of flutter_native_splash & flutter_launcher_icons after run this code?
I have a picture on the page and below it a color pallette of 9 colors. When user clicks a color from the pallette, the image is to show that color on it. For that I want to use an array and I am changing a variable on tap selectedIndex = 0 -> 8; And… Read More String is not a subtype of Color
I am fetching records from firebase collection with a UDF and calling this UDF inside Widget build, it has to refresh to show data, looks like. widget build before getting data….how to prevent loading widget build until data is not fetched … class _DemoPage2State extends State<DemoPage2> { List<String> list = []; void getusers() async {… Read More I have to refresh page for getting data in flutter listview.builder
Its not easy for me to explain what I want and thats why I have created this demo to make my point clear… I have a data mymap which key is based on random number and value is bool in my list tile of listview builder, I want sometime value and sometime key in it’s… Read More how to get key from map in flutter at required position's key in flutter
I’m working on an indexed list, I found this lib: ScrollablePositionedList that does the job, when I call the function jumpTo/scrollTo within a button tap, it works but when I call it before the return in build, it throws error: E/flutter ( 3018): [ERROR:flutter/lib/ui/ui_dart_state.cc(198)] Unhandled Exception: ‘package:scrollable_positioned_list/src/scrollable_positioned_list.dart’: Failed assertion: line 236 pos 12: ‘_scrollableListState !=… Read More Flutter: Error thrown in some case using ScrollablePositionedList