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Answer : I don't believe you can pass a gradient to an AppBar as it expects a Color rather than a gradient. You can, however, create your own widget that mimics an AppBar except by using a gradient. Take a look at this example that I've pieced together from the Planets-Flutter tutorial along with the code below it. import "package:flutter/material.dart"; class Page extends StatelessWidget { @override Widget build(BuildContext context) { return Column(children : <Widget>[GradientAppBar("Custom Gradient App Bar"), Container()],); } } class GradientAppBar extends StatelessWidget { final String title; final double barHeight = 50.0; GradientAppBar(this.title); @override Widget build(BuildContext context) { final double statusbarHeight = MediaQuery .of(context) .padding .top; return new Container( padding: EdgeInsets.only(top: statusbarHeight), height: statusbarHeight + barHeigh...

Answer : It's not possible to add border: and borderRadius: at the same time, you'll get this error: A borderRadius can only be given for uniform borders. You can achieve what you want using the borderRadius: and a boxShadow: instead of border: like this: boxShadow: [ BoxShadow(color: Colors.green, spreadRadius: 3) ] Your sample code would be like this: Container( child: Text( 'This is a Container', textScaleFactor: 2, style: TextStyle(color: Colors.black), ), decoration: BoxDecoration( borderRadius: BorderRadius.circular(10), color: Colors.white, boxShadow: [ BoxShadow(color: Colors.green, spreadRadius: 3), ], ), height: 50, ), Edit: To achieve the example you now provided, you could do this: Container( padding: EdgeInsets.only(left: 12.0), decoration: BoxDecoration( borderRadius: BorderRadius.circular(10.0), color: Colors.green, ), height: 50, child: Container( decoration: BoxD...