Just check boolean property mounted of the state class of your widget before calling setState(). if (this.mounted) { setState(() { // Your state change code goes here }); } Or even more clean approach Override setState method in your StatelfulWidget class. class DateTimeButton extends StatefulWidget { @override void setState(fn) { if(mounted) { super.setState(fn); } } … Read more
There are many ways of doing it, I’m listing a few here: Use SizedBox if you want to set some specific space Row( children: <Widget>[ Text(“1”), SizedBox(width: 50), // give it width Text(“2”), ], ) Use Spacer if you want both to be as far apart as possible. Row( children: <Widget>[ Text(“1”), Spacer(), // use … Read more
You can create an async method and call it inside your initState @override void initState () { super.initState(); WidgetsBinding.instance.addPostFrameCallback((_){ _asyncMethod(); }); } _asyncMethod() async { _googleSignIn.onCurrentUserChanged.listen((GoogleSignInAccount account) { setState(() { _currentUser = account; }); }); _googleSignIn.signInSilently(); }
What worked for me is a combination of @raffaelli-l-c and @arhan-reddy-busam answer. Ensure that you do the following: Set MinimumOSVersion to 9.0 in ios/Flutter/AppFrameworkInfo.plist Ensure that you uncomment platform :ios, ‘9.0’ in ios/Podfile Ensure that ios/Podfile contains the following post install script: post_install do |installer| installer.pods_project.targets.each do |target| flutter_additional_ios_build_settings(target) target.build_configurations.each do |config| config.build_settings[‘IPHONEOS_DEPLOYMENT_TARGET’] = ‘9.0’ … Read more
You can use WillPopScope to achieve this. Example: import ‘dart:async’; import ‘package:flutter/material.dart’; class HomePage extends StatefulWidget { HomePage({Key key, this.title}) :super(key: key); final String title; @override State<StatefulWidget> createState() => new _HomePageState(); } class _HomePageState extends State<HomePage> { Future<bool> _onWillPop() async { return (await showDialog( context: context, builder: (context) => new AlertDialog( title: new Text(‘Are you … Read more
TL;DR This is now implemented as Plugin const url = “https://flutter.io”; if (await canLaunchUrl(url)) await launchUrl(url); else // can’t launch url, there is some error throw “Could not launch $url”; Full example: import ‘package:flutter/material.dart’; import ‘package:url_launcher/url_launcher.dart’; void main() { runApp(new Scaffold( body: new Center( child: new RaisedButton( onPressed: _launchURL, child: new Text(‘Show Flutter homepage’), ), … Read more
toList() is missing to materializer the result _AnimatedMovies = AllMovies.where((i) => i.isAnimated).toList();
First import the services package: import ‘package:flutter/services.dart’; This will give you access to the SystemChrome class, which “Controls specific aspects of the operating system’s graphical interface and how it interacts with the application.” When you load the Widget, do something like this: @override void initState(){ super.initState(); SystemChrome.setPreferredOrientations([ DeviceOrientation.landscapeRight, DeviceOrientation.landscapeLeft, ]); } then when I leave … Read more
How to include images in your app 1. Create an assets/images folder This should be located in the root of your project, in the same folder as your pubspec.yaml file. In Android Studio you can right click in the Project view You don’t have to call it assets or images. You don’t even need to … Read more
Reproduce next steps and this warning will disapear Go to [YOUR_PROJECT]\build\app\intermediates\merged_native_libs\release\out\lib note that 3 folders exist inside arm64-v8a armeabi-v7a x86_64 Select this 3 folder and create a .zip file. Name doesn’t matter. [PLEASE NOTE THAT I HAVEN’T COMPRESSED THE ./lib FOLDER] Upload this new *.zip file as Symbol File. .