flutter-layout

I'm trying to change the color of system status bar to black. The configuration seems to be overridden by the AppBar class. I can achieve what I want by assigning theme: to ThemeData.dark() when creating the Material App, and then specifying an appBar attribute . But I don't want an AppBar, and also, doing it this way changes all the font colors. A possible solution is to inherit ThemeData.bright() into new class, then add something that only changes the system status bar through setSystemUIOverlayStyle And then I would need to specify AppBar and make it invisible somehow? https://docs.flutter

So I have been learning flutter in a while and I am stuck in this. Sorry if it is a noobish question. I am currently trying to build something like a Card Tab. The information and widget will be stored in a card. Imagine something like Tinder, where they have multiple card stack and swipe left and right to navigate. I plan to create that but I cannot seems to find a way to add/render a new card with a button. It's like adding something to the list, Flutter will use a ListView builder where we add to the list. But there is no TabBarView builder. Is this something that is not possible to do? I

Numerous questions relating to building Flutter UIs come down to the wrong BuildContext (such as showing a SnackBar ). The answers usually offer either of using a Builder or using a GlobalKey . Both work, but I noticed that the documentation for GlobalKey states: Global keys are relatively expensive. If you don't need any of the features listed above, consider using a Key , ValueKey , ObjectKey , or UniqueKey instead. The features referred to are unique identification and subtree re-parenting. Is the "relative expense" of using a GlobalKey for these circumstances reason enough to use a Builder

I'm still having a bit of trouble with the layouting in Flutter. Right now I want to have the available space shared between 3 widgets, in a quadrant layout. The width is evenly shared (this works fine via 2 Expanded widgets in a Row), but now I also want the height to adjust automatically so widget3.height == widget1.height + widget2.height . If the content of widget3 is larger, I want widget1 and widget2 to adjust their height and vice versa. Is this even possible in Flutter? Matt S. Have a look at IntrinsicHeight ; wrapping the root Row should provide the effect you're looking for: import

I face a problem by wrapping TextField with new Expanded() . When try to search something in textfield its show me bottom overflow by 30px . Below is my code: Widget build(BuildContext context) { return new Scaffold( body: Column( children: <Widget>[ Row( mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[ IconButton(icon: Icon(Icons.search), onPressed: () { setState(() { }); }), new Flexible( child: new TextField( onChanged: (String value) { onchange(value); }, maxLines: 1, autocorrect: true, // decoration: const InputDecoration(helperText: "Search"), style: new TextStyle

I have an interface with two buttons that pop and return true or false, like so: onPressed: () => Navigator.pop(context, false) I need to adapt the back button in the appbar, so it pops and also returns false. Is there a way to accomplish this? This may help and work for you 1st screen void goToSecondScreen()async { var result = await Navigator.push(_context, new MaterialPageRoute( builder: (BuildContext context) => new SecondScreen(context), fullscreenDialog: true,) ); Scaffold.of(_context).showSnackBar(SnackBar(content: Text("$result"),duration: Duration(seconds: 3),)); } 2nd screen