Indeed, it will loop into infinity because whenever build is called, updateList is also called and returns a brand new future. You have to keep your build pure. It should just read and combine variables and properties, but never cause any side effects! Another note: All fields of your StatefulWidget subclass must be final (widget.items … Read more
Note: this requires a more recent version of Flutter as it references APIs added in June 2018. You can create a custom SystemUiOverlayStyle using the default constructor. The color of the system nav bar is defined there. But to avoid setting a lot of null values, use the copyWith method to update the values from … Read more
Actually what you want is PageView. PageView accept a PageController as argument. And that controller possess a viewportFraction property (default to 1.0) which represent in percent the main-size of displayed pages. Which means that with a viewportFraction of 0.5, the main page will be centered. And you’ll see half a page on both left and … Read more
There is no guide or docs showing how to implement a App Widget for a flutter app. It is definitely possible to implement a app widget with native code. Just create a flutter project and open the android part with android studio, just implement your home screen widget, it’ll work like a charm. I just … Read more
There are lots of ways to do this depending on your use case. Here are a few options: You can expose the created object as public member of your State. Then use the currentState property of a GlobalKey in one State to get a reference to the other State. Now you can access the created … Read more
In order to determine the Orientation of the screen, we can use the OrientationBuilder Widget. The OrientationBuilder will determine the current Orientation and rebuild when the Orientation changes. new OrientationBuilder( builder: (context, orientation) { return new GridView.count( // Create a grid with 2 columns in portrait mode, or 3 columns in // landscape mode. crossAxisCount: … Read more
Use toString and/or toRadixString int intValue = 1; String stringValue = intValue.toString(); String hexValue = intValue.toRadixString(16); or, as in the commment String anotherValue=”the value is $intValue”;
Use PageView and ListView: import ‘package:flutter/material.dart’; main() => runApp(MaterialApp(home: MyHomePage())); class MyHomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(‘Carousel in vertical scrollable’), ), body: ListView.builder( padding: EdgeInsets.symmetric(vertical: 16.0), itemBuilder: (BuildContext context, int index) { if(index % 2 == 0) { return _buildCarousel(context, index ~/ 2); } else { … Read more
First, import services package: import ‘package:flutter/services.dart’; Next, simply put this in the build function of your App: SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle( statusBarColor: Colors.blue, //or set color with: Color(0xFF0000FF) )); Additionally, you can set useful properties like: statusBarIconBrightness, systemNavigationBarColor or systemNavigationBarDividerColor If you prefer a more flutter/widget way of doing the same thing, consider using the AnnotatedRegion<SystemUiOverlayStyle> widget. The … Read more
dynamic is a type underlying all Dart objects. You shouldn’t need to explicitly use it in most cases. var is a keyword, meaning “I don’t care to notate what the type is here.” Dart will replace the var keyword with the initializer type, or leave it dynamic by default if there is no initializer. Use … Read more