flutter-layout

FLUTTER | Right Align not working

白昼怎懂夜的黑 提交于 2019-12-04 02:24:34
Trying to right align a container with text view child, it has a row parent which is inside another column, tried number of solutions from Stack Overflow, didn't work. Code ///Transactions Heading new Column( children: <Widget>[ new Row( children: <Widget>[ new Container( alignment: Alignment.centerLeft, margin: new EdgeInsets.only(top: 20.0, left: 10.0), child: new Text( "Transactions", style: new TextStyle( color: primaryTextColor, fontSize: 25.0, fontWeight: FontWeight.w700, letterSpacing: 0.1, ), ), ), new Container( margin: new EdgeInsets.only(top: 25.0), child: new Text(

Flutter how to add a Expandable menu item inside navigation drawer?

别来无恙 提交于 2019-12-03 16:45:42
I want to add expandable menu to drawer items of flutter. How can I achieve this functionality in flutter. Please just point me in the correct direction if there is any example or blog. You have to pass the drawers child property a ListView, and in that ListView you can then use an ExpansionTile. That would look something like this: Drawer( child: ListView( children: <Widget>[ ExpansionTile( title: Text("Expansion Title"), children: <Widget>[Text("children 1"), Text("children 2")], ) ], ), ); 来源: https://stackoverflow.com/questions/51706739/flutter-how-to-add-a-expandable-menu-item-inside

Flow Layout in flutter example

余生颓废 提交于 2019-12-03 15:17:35
i want to implement flow layout in flutter i found a class called FLOW in sdk but unable to find sample code on how to use it here is the layout i am trying to achieve Use Wrap instead of Flow . Flow is for more complicated custom layout. Wrap is what is used to achieve the layout in your screenshot. new Wrap( spacing: 8.0, // gap between adjacent chips runSpacing: 4.0, // gap between lines children: <Widget>[ new Chip( avatar: new CircleAvatar(backgroundColor: Colors.blue.shade900, child: new Text('AH')), label: new Text('Hamilton'), ), new Chip( avatar: new CircleAvatar(backgroundColor:

Flutter how to add a Expandable menu item inside navigation drawer?

∥☆過路亽.° 提交于 2019-12-03 14:41:57
问题 I want to add expandable menu to drawer items of flutter. How can I achieve this functionality in flutter. Please just point me in the correct direction if there is any example or blog. 回答1: You have to pass the drawers child property a ListView, and in that ListView you can then use an ExpansionTile. That would look something like this: Drawer( child: ListView( children: <Widget>[ ExpansionTile( title: Text("Expansion Title"), children: <Widget>[Text("children 1"), Text("children 2")], ) ],

Flutter navigation drawer hamburger icon color change

ε祈祈猫儿з 提交于 2019-12-03 13:22:07
Hamburger icon color of navigation drawer is not changing. Its black by default. I want to change the this icon color in flutter, I am stuck, help me to change this icon color. here is my code. class Test extends StatefulWidget { @override _TestState createState() => new _TestState(); } class _TestState extends State<Test> { @override Widget build(BuildContext context) { return new Scaffold( drawer: new Drawer(), appBar: new AppBar( title: new Text("Navigation Drawer") ), ), ); } } Add iconTheme to your AppBar @override Widget build(BuildContext context) { return new Scaffold( drawer: new

Expand The App bar in Flutter to Allow Multi-Line Title?

旧巷老猫 提交于 2019-12-03 12:39:15
Does anyone know how I can create an app bar with a multi-line title, as per the material guidelines show here? https://material.io/design/components/app-bars-top.html#anatomy Any ideas how to do this? It seems like it should be straightforward given that it's part of the material guidelines! Worth pointing out that the title is user defined, so I want to allow the app bar to expand from a single line to multiple lines (perhaps with a limit imposed) depending on user input. Mike This is not implemented yet. However you can achieve similar results by using SliverAppBar designed for

Vertical viewport was given unbounded height error

可紊 提交于 2019-12-03 11:15:15
@override Widget build(BuildContext context) { return Column( children: <Widget>[ new Text("Some text"), ListView() ], ); } Widget ListView() { return ListView( padding: EdgeInsets.symmetric(vertical: 8.0), children: Item(), ); } List<Item> Item() { return list .map((item) => Item(text: item)) .toList(); } class Item extends ListTile { Item({String text, GestureTapCallback onTap}) : super(subtitle: Column(children: <Widget>[ Text(text), ])); } A blank space appears on the screen and the console says: Vertical viewport was given unbounded height. Viewports expand in the scrolling direction to

Understanding Flutter Render Engine

偶尔善良 提交于 2019-12-03 10:35:05
问题 The docs here about how to update a ListView say: In Flutter, if you were to update the list of widgets inside a setState(), you would quickly see that your data did not change visually. This is because when setState() is called, the Flutter rendering engine looks at the widget tree to see if anything has changed. When it gets to your ListView, it performs a == check, and determines that the two ListViews are the same. Nothing has changed, so no update is required. For a simple way to update

Flutter: How to make a button expand to the size of its parent?

半城伤御伤魂 提交于 2019-12-03 09:53:52
I am trying to create square buttons, but Expanded doesn't seem to work the same as it does with containers. Take the following code for example new Expanded( flex: 2, child: new Column( children: <Widget>[ new Expanded( child:new Row( children: <Widget>[ new Expanded(child: new MaterialButton(...)), new Expanded(child: new MaterialButton(....)), new Expanded(child: new Container(color: Colors.red)), new Expanded(child: new Container(color: Colors.green)), ] ) ) ], ) ) .... It displays two buttons that are expanded horizontally, but not vertically. At the same time the containers will expand

How to navigate to a specific flutter route from an Android activity?

蹲街弑〆低调 提交于 2019-12-03 08:47:45
I have an existing android application and i have integrated flutter in my project i want to call a flutter specific route which i define in my main method like this class FlutterView extends StatelessWidget { @override Widget build(BuildContext context) { return new MaterialApp( title: 'Platform View', initialRoute: '/', routes: { '/': (context) => HomeScreen(), '/secound': (context) => MyCustomForm(), '/dashboard': (context) => DashBoardScreen(), '/login': (context) => LoginScreen(), }, theme: new ThemeData( primarySwatch: Colors.red, textSelectionColor: Colors.red, textSelectionHandleColor: