try to use Expanded instead of Container in _buildImageBoxes() function Widget _buildImageBoxes() { return Column( children: <Widget>[ Expanded( child: Image.network(“https://picsum.photos/500/500/?random”), ), Container( padding: EdgeInsets.all(10), child: Text(“Text”), ) ], ); }
There is no option to specify the background color of BottomNavigationBar but to change the canvasColor. One way you can achieve it without messing up the whole app would be by wrapping BottomNavigationBar in a Theme with desired canvasColor. Example: bottomNavigationBar: new Theme( data: Theme.of(context).copyWith( // sets the background color of the `BottomNavigationBar` canvasColor: Colors.green, … Read more
This is a supplemental answer showing the implementation of a couple of the solutions mentioned. FractionallySizedBox If you have a single widget you can use a FractionallySizedBox widget to specify a percentage of the available space to fill. Here the green Container is set to fill 70% of the available width and 30% of the … Read more
For automaticKeepAlive to work, each item that needs to be kept alive must send a specific notification. A typical way to fire such notification is using AutomaticKeepAliveClientMixin class Foo extends StatefulWidget { @override FooState createState() { return new FooState(); } } class FooState extends State<Foo> with AutomaticKeepAliveClientMixin { @override Widget build(BuildContext context) { return Container( … Read more
Create a StatelessWidget say MyArc which accepts a diameter. import ‘dart:math’ as math; class MyArc extends StatelessWidget { final double diameter; const MyArc({super.key, this.diameter = 200}); @override Widget build(BuildContext context) { return CustomPaint( painter: MyPainter(), size: Size(diameter, diameter), ); } } // This is the Painter class class MyPainter extends CustomPainter { @override void paint(Canvas … Read more
Screenshot: Code: Using flexibleSpace Scaffold( appBar: AppBar( toolbarHeight: 120, // Set this height flexibleSpace: Container( color: Colors.orange, child: Column( children: [ Text(‘One’), Text(‘Two’), Text(‘Three’), Text(‘Four’), ], ), ), ), ) Using PreferredSize Scaffold( appBar: PreferredSize( preferredSize: Size.fromHeight(120), // Set this height child: Container( color: Colors.orange, child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Text(‘One’), Text(‘Two’), Text(‘Three’), Text(‘Four’), … Read more
Screenshot: Starting point: void main() => runApp(MaterialApp(home: HomePage())); HomePage [BottomNavigationBar + Page1] class HomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( bottomNavigationBar: BottomNavigationBar( backgroundColor: Colors.orange, items: [ BottomNavigationBarItem(icon: Icon(Icons.call), label: ‘Call’), BottomNavigationBarItem(icon: Icon(Icons.message), label: ‘Message’), ], ), body: Navigator( onGenerateRoute: (settings) { Widget page = Page1(); if (settings.name == ‘page2’) page = … Read more
There are generally two ways of doing it. 1. Using ScrollController // Create a variable final _controller = ScrollController(); @override void initState() { super.initState(); // Setup the listener. _controller.addListener(() { if (_controller.position.atEdge) { bool isTop = _controller.position.pixels == 0; if (isTop) { print(‘At the top’); } else { print(‘At the bottom’); } } }); } … Read more
I spent about two hours on it 🙂 how to use: import ‘package:flutter/material.dart’; void main() => runApp(App()); class App extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( body: SafeArea( child: Center( child: Column( mainAxisSize: MainAxisSize.min, children: <Widget>[ UnicornOutlineButton( strokeWidth: 2, radius: 24, gradient: LinearGradient(colors: [Colors.black, Colors.redAccent]), child: Text(‘OMG’, style: TextStyle(fontSize: 16)), … Read more
Use whichever suits your need. GridView.count(…) GridView.count( crossAxisCount: 2, children: <Widget>[ FlutterLogo(), FlutterLogo(), FlutterLogo(), FlutterLogo(), ], ) GridView.builder(…) GridView.builder( gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2), itemBuilder: (_, index) => FlutterLogo(), itemCount: 4, ) GridView(…) GridView( gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2), children: <Widget>[ FlutterLogo(), FlutterLogo(), FlutterLogo(), FlutterLogo(), ], ) GridView.custom(…) GridView.custom( gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2), childrenDelegate: SliverChildListDelegate( [ FlutterLogo(), FlutterLogo(), FlutterLogo(), FlutterLogo(), … Read more