By this simple code I can show dialog on bottom of screen like with this screenshot:
20.0
on showing dialogcontroller.reverse()
on dismiss dialogimport 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
void showPopup() {
showDialog(
context: context,
builder: (_) => PopUp(),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: showPopup,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class PopUp extends StatefulWidget {
@override
State<StatefulWidget> createState() => PopUpState();
}
class PopUpState extends State<PopUp> with SingleTickerProviderStateMixin {
AnimationController controller;
Animation<double> opacityAnimation;
Tween<double> opacityTween = Tween<double>(begin: 0.0, end: 1.0);
Tween<double> marginTopTween = Tween<double>(begin: 300, end: 280);
Animation<double> marginTopAnimation;
@override
void initState() {
super.initState();
controller = AnimationController(duration: const Duration(milliseconds: 300), vsync: this);
marginTopAnimation = marginTopTween.animate(controller)
..addListener(() {
setState(() {});
});
controller.forward();
}
@override
Widget build(BuildContext context) {
return FadeTransition(
opacity: opacityTween.animate(controller),
child: Material(
color: Colors.transparent,
child: Container(
margin: EdgeInsets.only(
top: marginTopAnimation.value,
left:20.0,
right:20.0,
),
color: Colors.red,
child: Text("Container"),
),
),
);
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
}
Simple DialogshowDialog() method in Flutter allows us to display basic dialogs with default animation. The following GIF shows a basic dialog in flutter. showGeneralDialog() is also another method provided by flutter to show dialogs. This function allows for the customization of aspects of the dialog popup.
You can Use Align widget and align your dialog widget as per your need. Here in example i am setting it to the bottomCenter that is Alignment(0, 1) . Example code: Align( alignment: Alignment(0, 1), child: Material( shape: RoundedRectangleBorder(borderRadius: BorderRadius.
The below-added code shows how to perform alert Dialog box in a flutter. I have used a button (Raised Button in flutter ) to trigger the alert dialog box. In its on the pressed property, we have to use the showDialog widget of flutter. It takes context and a builder.
Output:
Not sure if I got your question clearly, if this is what you are looking for, replace your PopUp
class with mine.
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(primarySwatch: Colors.blue),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
void showPopup() {
showDialog(
context: context,
builder: (_) => PopUp(),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: showPopup,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class PopUp extends StatefulWidget {
@override
State<StatefulWidget> createState() => PopUpState();
}
class PopUpState extends State<PopUp> with TickerProviderStateMixin {
AnimationController controller;
double _bottom = 0, _fromTop = 300, _screenHeight, _containerHeight = 300;
@override
void initState() {
super.initState();
controller = AnimationController(duration: const Duration(milliseconds: 300), vsync: this)
..addListener(() {
Timer.periodic(Duration(milliseconds: 15), (timer) {
if (_bottom < _screenHeight - _fromTop - _containerHeight) {
_bottom += 1;
setState(() {});
}
});
});
controller.forward();
}
@override
Widget build(BuildContext context) {
_screenHeight = MediaQuery.of(context).size.height;
return SizedBox(
width: double.infinity,
height: double.infinity,
child: Stack(
children: <Widget>[
Positioned(
bottom: _bottom,
left: 0,
right: 0,
child: Container(height: _containerHeight, color: Colors.green),
),
],
),
);
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
}
import 'package:flutter/material.dart';
void main() {
runApp(const MaterialApp(home: CityPage()));
}
class CityPage extends StatelessWidget {
const CityPage({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Center(
child: TextButton(
child: const Text('Press me'),
onPressed: () => BottomDialog().showBottomDialog(context),
),
),
],
),
);
}
}
class BottomDialog {
void showBottomDialog(BuildContext context) {
showGeneralDialog(
barrierLabel: "showGeneralDialog",
barrierDismissible: true,
barrierColor: Colors.black.withOpacity(0.6),
transitionDuration: const Duration(milliseconds: 400),
context: context,
pageBuilder: (context, _, __) {
return Align(
alignment: Alignment.bottomCenter,
child: _buildDialogContent(),
);
},
transitionBuilder: (_, animation1, __, child) {
return SlideTransition(
position: Tween(
begin: const Offset(0, 1),
end: const Offset(0, 0),
).animate(animation1),
child: child,
);
},
);
}
Widget _buildDialogContent() {
return IntrinsicHeight(
child: Container(
width: double.maxFinite,
clipBehavior: Clip.antiAlias,
padding: const EdgeInsets.all(16),
decoration: const BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(16),
topRight: Radius.circular(16),
),
),
child: Material(
child: Column(
children: [
const SizedBox(height: 16),
_buildImage(),
const SizedBox(height: 8),
_buildContinueText(),
const SizedBox(height: 16),
_buildEmapleText(),
const SizedBox(height: 16),
_buildTextField(),
const SizedBox(height: 16),
_buildContinueButton(),
],
),
),
),
);
}
Widget _buildImage() {
const image =
'https://user-images.githubusercontent.com/47568606/134579553-da578a80-b842-4ab9-ab0b-41f945fbc2a7.png';
return SizedBox(
height: 88,
child: Image.network(image, fit: BoxFit.cover),
);
}
Widget _buildContinueText() {
return const Text(
'Continue with account',
style: TextStyle(
fontSize: 22,
fontWeight: FontWeight.w500,
),
);
}
Widget _buildEmapleText() {
return const Text(
'example.com',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w500,
),
);
}
Widget _buildTextField() {
const iconSize = 40.0;
return Container(
height: 60,
padding: const EdgeInsets.symmetric(horizontal: 16),
decoration: BoxDecoration(
color: Colors.white,
border: Border.all(width: 1, color: Colors.grey.withOpacity(0.4)),
borderRadius: const BorderRadius.all(Radius.circular(8)),
),
child: Row(
children: [
Container(
width: iconSize,
height: iconSize,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Colors.grey[200],
),
child: const Center(
child: Text('Е'),
),
),
const SizedBox(height: 16),
Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.start,
children: const [
Text(
'[email protected]',
style: TextStyle(
fontWeight: FontWeight.w600,
),
),
Text('**********'),
],
)
],
),
);
}
Widget _buildContinueButton() {
return Container(
height: 40,
width: double.maxFinite,
decoration: const BoxDecoration(
color: Color(0xFF3375e0),
borderRadius: BorderRadius.all(Radius.circular(8)),
),
child: RawMaterialButton(
onPressed: () {
Navigator.of(context, rootNavigator: true).pop();
},
child: const Center(
child: Text(
'Continue',
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.w500,
),
),
),
),
);
}
}
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