I chose riverpod as my state management library. I am reading the official documentation and writing the code. However, the code can't find ConsumerStatefulWidget and ConsumerState, so it keeps showing a red line. When I hover my mouse over it, a suggestion pops up: "Would you like to create a class named 'ConsumerStatefulWidget?'"
import 'package:riverpod/riverpod.dart';
import 'package:flutter/material.dart';
class MyHomePage extends ConsumerStatefulWidget {
const MyHomePage({Key? key}) : super(key: key);
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends ConsumerState<MyHomePage> {
#override
Widget build(BuildContext context) {
return Container();
}
}
I tried pub get several times after flutter clean, but nothing changed.
It's a simple code that shouldn't be complicated, but I'm not sure why this problem occurs.
I just found out That I should use the flutter_riverpod package, not the riverpod package.
Related
I am trying to apply this state management but i cannot implement it. If I use stateless widget, i can easily implement it but stateful it is complicated and i cannot achieve it. Where to implement cubits? Here is my code part =>
class MaintenanceScreen extends StatefulWidget {
int? locId;
MaintenanceScreen({required this.locId, Key? key}) : super(key: key);
#override
_MaintenanceScreenState createState() => _MaintenanceScreenState();
}
class _MaintenanceScreenState extends State<MaintenanceScreen> {
final colFr = FrenchColors();
if you mean you want to access locId in _MaintenanceScreenState
simply you can use widget.locId inside the build function and flutter will bind this with the widget class.
I install the web_view flutter plugin and set minTargetSDk to 20 but still, I face an error on initialurl.
Here is the code snippet:
Kindly change you page name from WebView to any other.
Or you can do it as below:
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart' as wv;
class WebView extends StatefulWidget {
const WebView({Key? key}) : super(key: key);
#override
State<WebView> createState() => _WebViewState();
}
class _WebViewState extends State<WebView> {
#override
Widget build(BuildContext context) {
return wv.WebView(
initialUrl: 'https://flutter.dev/',
);
}
}
I'm writing a Application, where Widgets and their State need to be saved to Disk and later be restored. In order to save a StatefulWidget I need to access it's corresponding State<T> object.
Here's how I imagined the code to look like:
class Block extends StatefulWidget {
const Block({Key? key}) : super(key: key);
void saveToDisk(){
// access BlockState object
// save to disk…
}
#override
BlockState createState() => BlockState();
}
class BlockState extends State<Block> {
final String _someState = ‚Hello Stackoverflow‘;
#override
Widget build(BuildContext context) {
return const Text(‚Some Text‘);
}
}
Does anybody know how to access the BlockState object (first comment in saveToDisk())?
widget.saveToDisk();
All stateful widgets have it this way.
right now I am giving myself a first dive into Flutter animations. What I need is animation of a match getting burnt. What can I use to make it?
You can create such animations in Flutter Flare. Check out https://pub.dev/packages/flare_flutter
Create an animation on https://flare.rive.app/ and export using the export engine, or you can find ready resources on https://flare.rive.app/explore/popular/trending/all
once you get the .flr file from there, your can import it into your flutter app using the flare_flutter plugin.
import 'package:flare_flutter/flare_actor.dart';
class MyHomePage extends StatefulWidget {
#override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return new FlareActor("assets/Filip.flr", alignment:Alignment.center, fit:BoxFit.contain, animation:"idle");
}
}
I was learning flutter and came across stateful widget. Frankly, when I first faced stateful widget, that was quite confusing for me. So, here is the code:
class MyHomePage extends StatefulWidget {
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return Container();
}
The question is Is it true that when we, say, call setState in _MyHomePageState build function is called and THEN createState() is called which then calls _MyHomePageState()? So, again every time setState() is called, the following things will happen build() is invoked then createState() which then calls _MyHomePageState().Is that true?