How work with progress indicator in flutter
19
I'm newbie in flutter and wanted to know what is better way to add CircularProgressIndicator in my layout. For example, my login view. This view have username, password and login Button. I did want create a overlay layout (with Opacity) that, when loading, show progress indicator like I use in NativeScript, but I'm little confused with how to do and too if it is the better way. On NativeScript, for example, I add IndicatorActivity in main layout and set busy to true or false, so it overlay all view components when is loading.
Edit:
I was able to reach this result:
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
bool _loading = false;
void _onLoading() {
setState(() {
_loading = true;
new Future.delayed(new Duration(seconds: 3), _login);
});
}
Future _login() async{
setState((){
_loading = false;
});
}
@override
Widget build(BuildContext context) {
var body = new Column(
children: <Widget>[
new Container(
height: 40.0,
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.fromLTRB(15.0, 150.0, 15.0, 0.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new TextField(
decoration: new InputDecoration.collapsed(hintText: "username"),
),
),
new Container(
height: 40.0,
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.all(15.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new TextField(
decoration: new InputDecoration.collapsed(hintText: "password"),
),
),
],
);
var bodyProgress = new Container(
child: new Stack(
children: <Widget>[
body,
new Container(
alignment: AlignmentDirectional.center,
decoration: new BoxDecoration(
color: Colors.white70,
),
child: new Container(
decoration: new BoxDecoration(
color: Colors.blue[200],
borderRadius: new BorderRadius.circular(10.0)
),
width: 300.0,
height: 200.0,
alignment: AlignmentDirectional.center,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Center(
child: new SizedBox(
height: 50.0,
width: 50.0,
child: new CircularProgressIndicator(
value: null,
strokeWidth: 7.0,
),
),
),
new Container(
margin: const EdgeInsets.only(top: 25.0),
child: new Center(
child: new Text(
"loading.. wait...",
style: new TextStyle(
color: Colors.white
),
),
),
),
],
),
),
),
],
),
);
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Container(
decoration: new BoxDecoration(
color: Colors.blue[200]
),
child: _loading ? bodyProgress : body
),
floatingActionButton: new FloatingActionButton(
onPressed: _onLoading,
tooltip: 'Loading',
child: new Icon(Icons.check),
),
);
}
}
I'm still adapting to the idea of states. This code is within the expected when working with flutter?
Thanks!
dart
flutter edited Nov 2 '17 at 9:43
aziza
8,18222847
asked Nov 1 '17 at 23:12
Ricardo BocchiRicardo Bocchi
126139
add a comment |
19
I'm newbie in flutter and wanted to know what is better way to add CircularProgressIndicator in my layout. For example, my login view. This view have username, password and login Button. I did want create a overlay layout (with Opacity) that, when loading, show progress indicator like I use in NativeScript, but I'm little confused with how to do and too if it is the better way. On NativeScript, for example, I add IndicatorActivity in main layout and set busy to true or false, so it overlay all view components when is loading.
Edit:
I was able to reach this result:
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
bool _loading = false;
void _onLoading() {
setState(() {
_loading = true;
new Future.delayed(new Duration(seconds: 3), _login);
});
}
Future _login() async{
setState((){
_loading = false;
});
}
@override
Widget build(BuildContext context) {
var body = new Column(
children: <Widget>[
new Container(
height: 40.0,
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.fromLTRB(15.0, 150.0, 15.0, 0.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new TextField(
decoration: new InputDecoration.collapsed(hintText: "username"),
),
),
new Container(
height: 40.0,
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.all(15.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new TextField(
decoration: new InputDecoration.collapsed(hintText: "password"),
),
),
],
);
var bodyProgress = new Container(
child: new Stack(
children: <Widget>[
body,
new Container(
alignment: AlignmentDirectional.center,
decoration: new BoxDecoration(
color: Colors.white70,
),
child: new Container(
decoration: new BoxDecoration(
color: Colors.blue[200],
borderRadius: new BorderRadius.circular(10.0)
),
width: 300.0,
height: 200.0,
alignment: AlignmentDirectional.center,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Center(
child: new SizedBox(
height: 50.0,
width: 50.0,
child: new CircularProgressIndicator(
value: null,
strokeWidth: 7.0,
),
),
),
new Container(
margin: const EdgeInsets.only(top: 25.0),
child: new Center(
child: new Text(
"loading.. wait...",
style: new TextStyle(
color: Colors.white
),
),
),
),
],
),
),
),
],
),
);
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Container(
decoration: new BoxDecoration(
color: Colors.blue[200]
),
child: _loading ? bodyProgress : body
),
floatingActionButton: new FloatingActionButton(
onPressed: _onLoading,
tooltip: 'Loading',
child: new Icon(Icons.check),
),
);
}
}
I'm still adapting to the idea of states. This code is within the expected when working with flutter?
Thanks!
dart
flutter edited Nov 2 '17 at 9:43
aziza
8,18222847
asked Nov 1 '17 at 23:12
Ricardo BocchiRicardo Bocchi
126139
Please post your code
– SherylHohman
Nov 2 '17 at 0:09
add a comment |
19
19
19
10
I'm newbie in flutter and wanted to know what is better way to add CircularProgressIndicator in my layout. For example, my login view. This view have username, password and login Button. I did want create a overlay layout (with Opacity) that, when loading, show progress indicator like I use in NativeScript, but I'm little confused with how to do and too if it is the better way. On NativeScript, for example, I add IndicatorActivity in main layout and set busy to true or false, so it overlay all view components when is loading.
Edit:
I was able to reach this result:
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
bool _loading = false;
void _onLoading() {
setState(() {
_loading = true;
new Future.delayed(new Duration(seconds: 3), _login);
});
}
Future _login() async{
setState((){
_loading = false;
});
}
@override
Widget build(BuildContext context) {
var body = new Column(
children: <Widget>[
new Container(
height: 40.0,
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.fromLTRB(15.0, 150.0, 15.0, 0.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new TextField(
decoration: new InputDecoration.collapsed(hintText: "username"),
),
),
new Container(
height: 40.0,
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.all(15.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new TextField(
decoration: new InputDecoration.collapsed(hintText: "password"),
),
),
],
);
var bodyProgress = new Container(
child: new Stack(
children: <Widget>[
body,
new Container(
alignment: AlignmentDirectional.center,
decoration: new BoxDecoration(
color: Colors.white70,
),
child: new Container(
decoration: new BoxDecoration(
color: Colors.blue[200],
borderRadius: new BorderRadius.circular(10.0)
),
width: 300.0,
height: 200.0,
alignment: AlignmentDirectional.center,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Center(
child: new SizedBox(
height: 50.0,
width: 50.0,
child: new CircularProgressIndicator(
value: null,
strokeWidth: 7.0,
),
),
),
new Container(
margin: const EdgeInsets.only(top: 25.0),
child: new Center(
child: new Text(
"loading.. wait...",
style: new TextStyle(
color: Colors.white
),
),
),
),
],
),
),
),
],
),
);
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Container(
decoration: new BoxDecoration(
color: Colors.blue[200]
),
child: _loading ? bodyProgress : body
),
floatingActionButton: new FloatingActionButton(
onPressed: _onLoading,
tooltip: 'Loading',
child: new Icon(Icons.check),
),
);
}
}
I'm still adapting to the idea of states. This code is within the expected when working with flutter?
Thanks!
dart
flutter edited Nov 2 '17 at 9:43
aziza
8,18222847
asked Nov 1 '17 at 23:12
Ricardo BocchiRicardo Bocchi
126139
I'm newbie in flutter and wanted to know what is better way to add CircularProgressIndicator in my layout. For example, my login view. This view have username, password and login Button. I did want create a overlay layout (with Opacity) that, when loading, show progress indicator like I use in NativeScript, but I'm little confused with how to do and too if it is the better way. On NativeScript, for example, I add IndicatorActivity in main layout and set busy to true or false, so it overlay all view components when is loading.
Edit:
I was able to reach this result:
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
bool _loading = false;
void _onLoading() {
setState(() {
_loading = true;
new Future.delayed(new Duration(seconds: 3), _login);
});
}
Future _login() async{
setState((){
_loading = false;
});
}
@override
Widget build(BuildContext context) {
var body = new Column(
children: <Widget>[
new Container(
height: 40.0,
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.fromLTRB(15.0, 150.0, 15.0, 0.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new TextField(
decoration: new InputDecoration.collapsed(hintText: "username"),
),
),
new Container(
height: 40.0,
padding: const EdgeInsets.all(10.0),
margin: const EdgeInsets.all(15.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new TextField(
decoration: new InputDecoration.collapsed(hintText: "password"),
),
),
],
);
var bodyProgress = new Container(
child: new Stack(
children: <Widget>[
body,
new Container(
alignment: AlignmentDirectional.center,
decoration: new BoxDecoration(
color: Colors.white70,
),
child: new Container(
decoration: new BoxDecoration(
color: Colors.blue[200],
borderRadius: new BorderRadius.circular(10.0)
),
width: 300.0,
height: 200.0,
alignment: AlignmentDirectional.center,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Center(
child: new SizedBox(
height: 50.0,
width: 50.0,
child: new CircularProgressIndicator(
value: null,
strokeWidth: 7.0,
),
),
),
new Container(
margin: const EdgeInsets.only(top: 25.0),
child: new Center(
child: new Text(
"loading.. wait...",
style: new TextStyle(
color: Colors.white
),
),
),
),
],
),
),
),
],
),
);
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Container(
decoration: new BoxDecoration(
color: Colors.blue[200]
),
child: _loading ? bodyProgress : body
),
floatingActionButton: new FloatingActionButton(
onPressed: _onLoading,
tooltip: 'Loading',
child: new Icon(Icons.check),
),
);
}
}
I'm still adapting to the idea of states. This code is within the expected when working with flutter?
Thanks!
dart
flutter dart
flutter edited Nov 2 '17 at 9:43
aziza
8,18222847
asked Nov 1 '17 at 23:12
Ricardo BocchiRicardo Bocchi
126139
edited Nov 2 '17 at 9:43
aziza
8,18222847
asked Nov 1 '17 at 23:12
Ricardo BocchiRicardo Bocchi
126139
edited Nov 2 '17 at 9:43
aziza
8,18222847
edited Nov 2 '17 at 9:43
aziza
8,18222847
edited Nov 2 '17 at 9:43
aziza
8,18222847
8,18222847
asked Nov 1 '17 at 23:12
Ricardo BocchiRicardo Bocchi
126139
asked Nov 1 '17 at 23:12
Ricardo BocchiRicardo Bocchi
126139
asked Nov 1 '17 at 23:12
Ricardo BocchiRicardo Bocchi
126139
126139
Please post your code
– SherylHohman
Nov 2 '17 at 0:09
add a comment |
Please post your code
– SherylHohman
Nov 2 '17 at 0:09
Please post your code
– SherylHohman
Nov 2 '17 at 0:09
Please post your code
– SherylHohman
Nov 2 '17 at 0:09
add a comment |
8 Answers
8
active
oldest
votes
23
In flutter, there are a few way to deal with Async actions.
An lazy way to do it can be using a modal. Which will block the user input, thus preventing any unwanted actions.
This would require very little change to your code. Just modifying your _onLoading to something like this :
void _onLoading() {
showDialog(
context: context,
barrierDismissible: false,
child: new Dialog(
child: new Row(
mainAxisSize: MainAxisSize.min,
children: [
new CircularProgressIndicator(),
new Text("Loading"),
],
),
),
);
new Future.delayed(new Duration(seconds: 3), () {
Navigator.pop(context); //pop dialog
_login();
});
}
The most ideal way to do it is using FutureBuilder and a stateful widget. Which is what you started.
The trick is that, instead of having a boolean loading = false in your state, you can directly use a Future<MyUser> user
And then pass it as argument to FutureBuilder, which will give you some info such as "hasData" or the instance of MyUser when completed.
This would lead to something like this :
@immutable
class MyUser {
final String name;
MyUser(this.name);
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Future<MyUser> user;
void _logIn() {
setState(() {
user = new Future.delayed(const Duration(seconds: 3), () {
return new MyUser("Toto");
});
});
}
Widget _buildForm(AsyncSnapshot<MyUser> snapshot) {
var floatBtn = new RaisedButton(
onPressed:
snapshot.connectionState == ConnectionState.none ? _logIn : null,
child: new Icon(Icons.save),
);
var action =
snapshot.connectionState != ConnectionState.none && !snapshot.hasData
? new Stack(
alignment: FractionalOffset.center,
children: <Widget>[
floatBtn,
new CircularProgressIndicator(
backgroundColor: Colors.red,
),
],
)
: floatBtn;
return new ListView(
padding: const EdgeInsets.all(15.0),
children: <Widget>[
new ListTile(
title: new TextField(),
),
new ListTile(
title: new TextField(obscureText: true),
),
new Center(child: action)
],
);
}
@override
Widget build(BuildContext context) {
return new FutureBuilder(
future: user,
builder: (context, AsyncSnapshot<MyUser> snapshot) {
if (snapshot.hasData) {
return new Scaffold(
appBar: new AppBar(
title: new Text("Hello ${snapshot.data.name}"),
),
);
} else {
return new Scaffold(
appBar: new AppBar(
title: new Text("Connection"),
),
body: _buildForm(snapshot),
);
}
},
);
}
}
answered Nov 2 '17 at 12:40
Rémi RousseletRémi Rousselet
30.2k36793
Cool, both examples will be useful on login and other situations. Handler progress with dialog looks better than my version and FutureBuilder It's more elegant than my solution too. thanks for help!
– Ricardo Bocchi
Nov 2 '17 at 16:49
a question off topic.. to each TextField I need a TextEditingController unique?
– Ricardo Bocchi
Nov 2 '17 at 17:36
@RicardoBocchi Yes
– aziza
Nov 2 '17 at 19:59
I do not think the Dialog will work with actual example, it is confusing how will the user be redirected after the _login() is returned. Your second example though seems way more convenient. Well baked.
– aziza
Nov 2 '17 at 23:02
Well, the Dialog is functional and requires very little modification to his original code. He could for example follow the dialog close with aNavigator.pushNamed("/home").
– Rémi Rousselet
Nov 3 '17 at 1:20
|
show 3 more comments
13
For me, one neat way to do this is to show a SnackBar at the bottom while the Signing-In process is taken place, this is a an example of what I mean:
Here is how to setup the SnackBar.
Define a global key for your Scaffold
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
Add it to your Scaffold key attribute
return new Scaffold(
key: _scaffoldKey,
.......
My SignIn button onPressed callback:
onPressed: () {
_scaffoldKey.currentState.showSnackBar(
new SnackBar(duration: new Duration(seconds: 4), content:
new Row(
children: <Widget>[
new CircularProgressIndicator(),
new Text(" Signing-In...")
],
),
));
_handleSignIn()
.whenComplete(() =>
Navigator.of(context).pushNamed("/Home")
);
}
It really depends on how you want to build your layout, and I am not sure what you have in mind.
Edit
You probably want it this way, I have used a Stack to achieve this result and just show or hide my indicator based on onPressed
class TestSignInView extends StatefulWidget {
@override
_TestSignInViewState createState() => new _TestSignInViewState();
}
class _TestSignInViewState extends State<TestSignInView> {
bool _load = false;
@override
Widget build(BuildContext context) {
Widget loadingIndicator =_load? new Container(
color: Colors.grey[300],
width: 70.0,
height: 70.0,
child: new Padding(padding: const EdgeInsets.all(5.0),child: new Center(child: new CircularProgressIndicator())),
):new Container();
return new Scaffold(
backgroundColor: Colors.white,
body: new Stack(children: <Widget>[new Padding(
padding: const EdgeInsets.symmetric(vertical: 50.0, horizontal: 20.0),
child: new ListView(
children: <Widget>[
new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center
,children: <Widget>[
new TextField(),
new TextField(),
new FlatButton(color:Colors.blue,child: new Text('Sign In'),
onPressed: () {
setState((){
_load=true;
});
//Navigator.of(context).push(new MaterialPageRoute(builder: (_)=>new HomeTest()));
}
),
],),],
),),
new Align(child: loadingIndicator,alignment: FractionalOffset.center,),
],));
}
}
answered Nov 2 '17 at 0:43
azizaaziza
8,18222847
Hi, that's what I wanted to do, but I was not getting the layout I needed. Stack is the answer. About StatefulWidget, is it correct build all view when progress state change?
– Ricardo Bocchi
Nov 2 '17 at 1:41
Hey, I do not understand your question?
– aziza
Nov 2 '17 at 1:46
In my code, when_loadingchange, all views are rebuild. Is that so?
– Ricardo Bocchi
Nov 2 '17 at 1:52
1
Using a modal is probably much easier and more intuitive at the same time. You can just push a loading dialog at the beggining or your request, and pop it when finished. It also has the advantage of preventing further user input.
– Rémi Rousselet
Nov 2 '17 at 9:12
1
Okey, let me bake something.
– Rémi Rousselet
Nov 2 '17 at 9:18
|
show 3 more comments
6
1. Without plugin
class IndiSampleState extends State<ProgHudPage> {
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Demo'),
),
body: Center(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async {
showDialog(
context: context,
builder: (BuildContext context) {
return Center(child: CircularProgressIndicator(),);
});
await loginAction();
Navigator.pop(context);
},
),
));
}
Future<bool> loginAction() async {
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
2. With plugin
check this plugin progress_hud
add the dependency in the pubspec.yaml file
dev_dependencies:
progress_hud:
import the package
import 'package:progress_hud/progress_hud.dart';
Sample code is given below to show and hide the indicator
class ProgHudPage extends StatefulWidget {
@override
_ProgHudPageState createState() => _ProgHudPageState();
}
class _ProgHudPageState extends State<ProgHudPage> {
ProgressHUD _progressHUD;
@override
void initState() {
_progressHUD = new ProgressHUD(
backgroundColor: Colors.black12,
color: Colors.white,
containerColor: Colors.blue,
borderRadius: 5.0,
loading: false,
text: 'Loading...',
);
super.initState();
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('ProgressHUD Demo'),
),
body: new Stack(
children: <Widget>[
_progressHUD,
new Positioned(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async{
_progressHUD.state.show();
await loginAction();
_progressHUD.state.dismiss();
},
),
bottom: 30.0,
right: 10.0)
],
));
}
Future<bool> loginAction()async{
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
answered Mar 21 '18 at 9:40
Shyju MShyju M
1,1171018
3
Don't vote this down, some people don't want to handle the nitty-gritty details of UI and am one of them so this plugin comes in handy
– Vladtn
Apr 4 '18 at 10:19
1
Its not working.
– prashant fepale
Jul 4 '18 at 7:57
2
the progress bar in api is fair enough adding dependency increases build size. already flutter build is excessive.
– prashant0205
Jul 23 '18 at 10:25
Should you really add this as a Dev Dependency?
– George
Dec 25 '18 at 14:39
This plugin is not working!!!
– Idee
Jan 3 at 15:35
|
show 12 more comments
5
Create a bool isLoading and set it to false. With the help of ternary operator, When user clicks on login button set state of isLoading to true. You will get circular loading indicator in place of login button
isLoading ? new PrimaryButton(
key: new Key('login'),
text: 'Login',
height: 44.0,
onPressed: SetState((){isLoading = ture;}))
: Center(
child: CircularProgressIndicator(),
),
You can see Screenshots how it looks while before login clicked
After login clicked
In mean time you can run login process and login user. If user credentials are wrong then again you will setState of isLoading to false, such that loading indicator will become invisible and login button visible to user.
By the way, primaryButton used in code is my custom button. You can do same with OnPressed in button.
answered Nov 27 '18 at 9:57
Harsha pulikolluHarsha pulikollu
17218
That's actually pretty smart! No need to handle double click etc. Thanks.
– Benobab
Feb 2 at 21:03
add a comment |
3
I took the following approach, which uses a simple modal progress indicator widget that wraps whatever you want to make modal during an async call.
The example in the package also addresses how to handle form validation while making async calls to validate the form (see flutter/issues/9688 for details of this problem). For example, without leaving the form, this async form validation method can be used to validate a new user name against existing names in a database while signing up.
https://pub.dartlang.org/packages/modal_progress_hud
Here is the demo of the example provided with the package (with source code):
Example could be adapted to other modal progress indicator behaviour (like different animations, additional text in modal, etc..).
answered Jul 12 '18 at 13:59
mmccabemmccabe
1,1001016
add a comment |
0
This is my solution with stack
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'dart:async';
final themeColor = new Color(0xfff5a623);
final primaryColor = new Color(0xff203152);
final greyColor = new Color(0xffaeaeae);
final greyColor2 = new Color(0xffE8E8E8);
class LoadindScreen extends StatefulWidget {
LoadindScreen({Key key, this.title}) : super(key: key);
final String title;
@override
LoginScreenState createState() => new LoginScreenState();
}
class LoginScreenState extends State<LoadindScreen> {
SharedPreferences prefs;
bool isLoading = false;
Future<Null> handleSignIn() async {
setState(() {
isLoading = true;
});
prefs = await SharedPreferences.getInstance();
var isLoadingFuture = Future.delayed(const Duration(seconds: 3), () {
return false;
});
isLoadingFuture.then((response) {
setState(() {
isLoading = response;
});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
widget.title,
style: TextStyle(color: primaryColor, fontWeight: FontWeight.bold),
),
centerTitle: true,
),
body: Stack(
children: <Widget>[
Center(
child: FlatButton(
onPressed: handleSignIn,
child: Text(
'SIGN IN WITH GOOGLE',
style: TextStyle(fontSize: 16.0),
),
color: Color(0xffdd4b39),
highlightColor: Color(0xffff7f7f),
splashColor: Colors.transparent,
textColor: Colors.white,
padding: EdgeInsets.fromLTRB(30.0, 15.0, 30.0, 15.0)),
),
// Loading
Positioned(
child: isLoading
? Container(
child: Center(
child: CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(themeColor),
),
),
color: Colors.white.withOpacity(0.8),
)
: Container(),
),
],
));
}
}
answered Aug 27 '18 at 3:56
kokemomukekokemomuke
344510
add a comment |
0
You can use FutureBuilder widget instead. This takes an argument which must be a Future. Then you can use a snapshot which is the state at the time being of the async call when loging in, once it ends the state of the async function return will be updated and the future builder will rebuild itself so you can then ask for the new state.
FutureBuilder(
future: myFutureFunction(),
builder: (context, AsyncSnapshot<List<item>> snapshot) {
if (!snapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
} else {
//Send the user to the next page.
},
);
Here you have an example on how to build a Future
Future<void> myFutureFunction() async{
await callToApi();}
answered Nov 26 '18 at 19:46
MatiasMatias
342312
add a comment |
0
class Loader extends StatefulWidget {
@override
State createState() => LoaderState();
}
class LoaderState extends State<Loader> with SingleTickerProviderStateMixin {
AnimationController controller;
Animation<double> animation;
@override
void initState() {
super.initState();
controller = AnimationController(
duration: Duration(milliseconds: 1200), vsync: this);
animation = CurvedAnimation(parent: controller, curve: Curves.elasticOut);
animation.addListener(() {
this.setState(() {});
});
animation.addStatusListener((AnimationStatus status) {});
controller.repeat();
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 100.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue[300],
height: 3.0,
width: animation.value * 75.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 50.0,
)
],
);
}
}
Expanded(
child: Padding(
padding:
EdgeInsets.only(left: 20.0, right: 5.0, top:20.0),
child: GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => FirstScreen()));
},
child: Container(
alignment: Alignment.center,
height: 45.0,
decoration: BoxDecoration(
color: Color(0xFF1976D2),
borderRadius: BorderRadius.circular(9.0)),
child: Text('Login',
style: TextStyle(
fontSize: 20.0, color: Colors.white))),
),
),
),
answered Dec 24 '18 at 21:01
Max ZubkoMax Zubko
114
How can I combine a class that creates a loading indicator with my button, so that when I press it, the indicator turns on and flips to the next page ?
– Max Zubko
Dec 24 '18 at 21:01
add a comment |
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8 Answers
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23
In flutter, there are a few way to deal with Async actions.
An lazy way to do it can be using a modal. Which will block the user input, thus preventing any unwanted actions.
This would require very little change to your code. Just modifying your _onLoading to something like this :
void _onLoading() {
showDialog(
context: context,
barrierDismissible: false,
child: new Dialog(
child: new Row(
mainAxisSize: MainAxisSize.min,
children: [
new CircularProgressIndicator(),
new Text("Loading"),
],
),
),
);
new Future.delayed(new Duration(seconds: 3), () {
Navigator.pop(context); //pop dialog
_login();
});
}
The most ideal way to do it is using FutureBuilder and a stateful widget. Which is what you started.
The trick is that, instead of having a boolean loading = false in your state, you can directly use a Future<MyUser> user
And then pass it as argument to FutureBuilder, which will give you some info such as "hasData" or the instance of MyUser when completed.
This would lead to something like this :
@immutable
class MyUser {
final String name;
MyUser(this.name);
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Future<MyUser> user;
void _logIn() {
setState(() {
user = new Future.delayed(const Duration(seconds: 3), () {
return new MyUser("Toto");
});
});
}
Widget _buildForm(AsyncSnapshot<MyUser> snapshot) {
var floatBtn = new RaisedButton(
onPressed:
snapshot.connectionState == ConnectionState.none ? _logIn : null,
child: new Icon(Icons.save),
);
var action =
snapshot.connectionState != ConnectionState.none && !snapshot.hasData
? new Stack(
alignment: FractionalOffset.center,
children: <Widget>[
floatBtn,
new CircularProgressIndicator(
backgroundColor: Colors.red,
),
],
)
: floatBtn;
return new ListView(
padding: const EdgeInsets.all(15.0),
children: <Widget>[
new ListTile(
title: new TextField(),
),
new ListTile(
title: new TextField(obscureText: true),
),
new Center(child: action)
],
);
}
@override
Widget build(BuildContext context) {
return new FutureBuilder(
future: user,
builder: (context, AsyncSnapshot<MyUser> snapshot) {
if (snapshot.hasData) {
return new Scaffold(
appBar: new AppBar(
title: new Text("Hello ${snapshot.data.name}"),
),
);
} else {
return new Scaffold(
appBar: new AppBar(
title: new Text("Connection"),
),
body: _buildForm(snapshot),
);
}
},
);
}
}
answered Nov 2 '17 at 12:40
Rémi RousseletRémi Rousselet
30.2k36793
Cool, both examples will be useful on login and other situations. Handler progress with dialog looks better than my version and FutureBuilder It's more elegant than my solution too. thanks for help!
– Ricardo Bocchi
Nov 2 '17 at 16:49
a question off topic.. to each TextField I need a TextEditingController unique?
– Ricardo Bocchi
Nov 2 '17 at 17:36
@RicardoBocchi Yes
– aziza
Nov 2 '17 at 19:59
I do not think the Dialog will work with actual example, it is confusing how will the user be redirected after the _login() is returned. Your second example though seems way more convenient. Well baked.
– aziza
Nov 2 '17 at 23:02
Well, the Dialog is functional and requires very little modification to his original code. He could for example follow the dialog close with aNavigator.pushNamed("/home").
– Rémi Rousselet
Nov 3 '17 at 1:20
|
show 3 more comments
23
In flutter, there are a few way to deal with Async actions.
An lazy way to do it can be using a modal. Which will block the user input, thus preventing any unwanted actions.
This would require very little change to your code. Just modifying your _onLoading to something like this :
void _onLoading() {
showDialog(
context: context,
barrierDismissible: false,
child: new Dialog(
child: new Row(
mainAxisSize: MainAxisSize.min,
children: [
new CircularProgressIndicator(),
new Text("Loading"),
],
),
),
);
new Future.delayed(new Duration(seconds: 3), () {
Navigator.pop(context); //pop dialog
_login();
});
}
The most ideal way to do it is using FutureBuilder and a stateful widget. Which is what you started.
The trick is that, instead of having a boolean loading = false in your state, you can directly use a Future<MyUser> user
And then pass it as argument to FutureBuilder, which will give you some info such as "hasData" or the instance of MyUser when completed.
This would lead to something like this :
@immutable
class MyUser {
final String name;
MyUser(this.name);
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Future<MyUser> user;
void _logIn() {
setState(() {
user = new Future.delayed(const Duration(seconds: 3), () {
return new MyUser("Toto");
});
});
}
Widget _buildForm(AsyncSnapshot<MyUser> snapshot) {
var floatBtn = new RaisedButton(
onPressed:
snapshot.connectionState == ConnectionState.none ? _logIn : null,
child: new Icon(Icons.save),
);
var action =
snapshot.connectionState != ConnectionState.none && !snapshot.hasData
? new Stack(
alignment: FractionalOffset.center,
children: <Widget>[
floatBtn,
new CircularProgressIndicator(
backgroundColor: Colors.red,
),
],
)
: floatBtn;
return new ListView(
padding: const EdgeInsets.all(15.0),
children: <Widget>[
new ListTile(
title: new TextField(),
),
new ListTile(
title: new TextField(obscureText: true),
),
new Center(child: action)
],
);
}
@override
Widget build(BuildContext context) {
return new FutureBuilder(
future: user,
builder: (context, AsyncSnapshot<MyUser> snapshot) {
if (snapshot.hasData) {
return new Scaffold(
appBar: new AppBar(
title: new Text("Hello ${snapshot.data.name}"),
),
);
} else {
return new Scaffold(
appBar: new AppBar(
title: new Text("Connection"),
),
body: _buildForm(snapshot),
);
}
},
);
}
}
answered Nov 2 '17 at 12:40
Rémi RousseletRémi Rousselet
30.2k36793
Cool, both examples will be useful on login and other situations. Handler progress with dialog looks better than my version and FutureBuilder It's more elegant than my solution too. thanks for help!
– Ricardo Bocchi
Nov 2 '17 at 16:49
a question off topic.. to each TextField I need a TextEditingController unique?
– Ricardo Bocchi
Nov 2 '17 at 17:36
@RicardoBocchi Yes
– aziza
Nov 2 '17 at 19:59
I do not think the Dialog will work with actual example, it is confusing how will the user be redirected after the _login() is returned. Your second example though seems way more convenient. Well baked.
– aziza
Nov 2 '17 at 23:02
Well, the Dialog is functional and requires very little modification to his original code. He could for example follow the dialog close with aNavigator.pushNamed("/home").
– Rémi Rousselet
Nov 3 '17 at 1:20
|
show 3 more comments
23
23
23
In flutter, there are a few way to deal with Async actions.
An lazy way to do it can be using a modal. Which will block the user input, thus preventing any unwanted actions.
This would require very little change to your code. Just modifying your _onLoading to something like this :
void _onLoading() {
showDialog(
context: context,
barrierDismissible: false,
child: new Dialog(
child: new Row(
mainAxisSize: MainAxisSize.min,
children: [
new CircularProgressIndicator(),
new Text("Loading"),
],
),
),
);
new Future.delayed(new Duration(seconds: 3), () {
Navigator.pop(context); //pop dialog
_login();
});
}
The most ideal way to do it is using FutureBuilder and a stateful widget. Which is what you started.
The trick is that, instead of having a boolean loading = false in your state, you can directly use a Future<MyUser> user
And then pass it as argument to FutureBuilder, which will give you some info such as "hasData" or the instance of MyUser when completed.
This would lead to something like this :
@immutable
class MyUser {
final String name;
MyUser(this.name);
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Future<MyUser> user;
void _logIn() {
setState(() {
user = new Future.delayed(const Duration(seconds: 3), () {
return new MyUser("Toto");
});
});
}
Widget _buildForm(AsyncSnapshot<MyUser> snapshot) {
var floatBtn = new RaisedButton(
onPressed:
snapshot.connectionState == ConnectionState.none ? _logIn : null,
child: new Icon(Icons.save),
);
var action =
snapshot.connectionState != ConnectionState.none && !snapshot.hasData
? new Stack(
alignment: FractionalOffset.center,
children: <Widget>[
floatBtn,
new CircularProgressIndicator(
backgroundColor: Colors.red,
),
],
)
: floatBtn;
return new ListView(
padding: const EdgeInsets.all(15.0),
children: <Widget>[
new ListTile(
title: new TextField(),
),
new ListTile(
title: new TextField(obscureText: true),
),
new Center(child: action)
],
);
}
@override
Widget build(BuildContext context) {
return new FutureBuilder(
future: user,
builder: (context, AsyncSnapshot<MyUser> snapshot) {
if (snapshot.hasData) {
return new Scaffold(
appBar: new AppBar(
title: new Text("Hello ${snapshot.data.name}"),
),
);
} else {
return new Scaffold(
appBar: new AppBar(
title: new Text("Connection"),
),
body: _buildForm(snapshot),
);
}
},
);
}
}
answered Nov 2 '17 at 12:40
Rémi RousseletRémi Rousselet
30.2k36793
In flutter, there are a few way to deal with Async actions.
An lazy way to do it can be using a modal. Which will block the user input, thus preventing any unwanted actions.
This would require very little change to your code. Just modifying your _onLoading to something like this :
void _onLoading() {
showDialog(
context: context,
barrierDismissible: false,
child: new Dialog(
child: new Row(
mainAxisSize: MainAxisSize.min,
children: [
new CircularProgressIndicator(),
new Text("Loading"),
],
),
),
);
new Future.delayed(new Duration(seconds: 3), () {
Navigator.pop(context); //pop dialog
_login();
});
}
The most ideal way to do it is using FutureBuilder and a stateful widget. Which is what you started.
The trick is that, instead of having a boolean loading = false in your state, you can directly use a Future<MyUser> user
And then pass it as argument to FutureBuilder, which will give you some info such as "hasData" or the instance of MyUser when completed.
This would lead to something like this :
@immutable
class MyUser {
final String name;
MyUser(this.name);
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Future<MyUser> user;
void _logIn() {
setState(() {
user = new Future.delayed(const Duration(seconds: 3), () {
return new MyUser("Toto");
});
});
}
Widget _buildForm(AsyncSnapshot<MyUser> snapshot) {
var floatBtn = new RaisedButton(
onPressed:
snapshot.connectionState == ConnectionState.none ? _logIn : null,
child: new Icon(Icons.save),
);
var action =
snapshot.connectionState != ConnectionState.none && !snapshot.hasData
? new Stack(
alignment: FractionalOffset.center,
children: <Widget>[
floatBtn,
new CircularProgressIndicator(
backgroundColor: Colors.red,
),
],
)
: floatBtn;
return new ListView(
padding: const EdgeInsets.all(15.0),
children: <Widget>[
new ListTile(
title: new TextField(),
),
new ListTile(
title: new TextField(obscureText: true),
),
new Center(child: action)
],
);
}
@override
Widget build(BuildContext context) {
return new FutureBuilder(
future: user,
builder: (context, AsyncSnapshot<MyUser> snapshot) {
if (snapshot.hasData) {
return new Scaffold(
appBar: new AppBar(
title: new Text("Hello ${snapshot.data.name}"),
),
);
} else {
return new Scaffold(
appBar: new AppBar(
title: new Text("Connection"),
),
body: _buildForm(snapshot),
);
}
},
);
}
}
answered Nov 2 '17 at 12:40
Rémi RousseletRémi Rousselet
30.2k36793
answered Nov 2 '17 at 12:40
Rémi RousseletRémi Rousselet
30.2k36793
answered Nov 2 '17 at 12:40
Rémi RousseletRémi Rousselet
30.2k36793
answered Nov 2 '17 at 12:40
Rémi RousseletRémi Rousselet
30.2k36793
30.2k36793
Cool, both examples will be useful on login and other situations. Handler progress with dialog looks better than my version and FutureBuilder It's more elegant than my solution too. thanks for help!
– Ricardo Bocchi
Nov 2 '17 at 16:49
a question off topic.. to each TextField I need a TextEditingController unique?
– Ricardo Bocchi
Nov 2 '17 at 17:36
@RicardoBocchi Yes
– aziza
Nov 2 '17 at 19:59
I do not think the Dialog will work with actual example, it is confusing how will the user be redirected after the _login() is returned. Your second example though seems way more convenient. Well baked.
– aziza
Nov 2 '17 at 23:02
Well, the Dialog is functional and requires very little modification to his original code. He could for example follow the dialog close with aNavigator.pushNamed("/home").
– Rémi Rousselet
Nov 3 '17 at 1:20
|
show 3 more comments
Cool, both examples will be useful on login and other situations. Handler progress with dialog looks better than my version and FutureBuilder It's more elegant than my solution too. thanks for help!
– Ricardo Bocchi
Nov 2 '17 at 16:49
a question off topic.. to each TextField I need a TextEditingController unique?
– Ricardo Bocchi
Nov 2 '17 at 17:36
@RicardoBocchi Yes
– aziza
Nov 2 '17 at 19:59
I do not think the Dialog will work with actual example, it is confusing how will the user be redirected after the _login() is returned. Your second example though seems way more convenient. Well baked.
– aziza
Nov 2 '17 at 23:02
Well, the Dialog is functional and requires very little modification to his original code. He could for example follow the dialog close with aNavigator.pushNamed("/home").
– Rémi Rousselet
Nov 3 '17 at 1:20
Cool, both examples will be useful on login and other situations. Handler progress with dialog looks better than my version and FutureBuilder It's more elegant than my solution too. thanks for help!
– Ricardo Bocchi
Nov 2 '17 at 16:49
Cool, both examples will be useful on login and other situations. Handler progress with dialog looks better than my version and FutureBuilder It's more elegant than my solution too. thanks for help!
– Ricardo Bocchi
Nov 2 '17 at 16:49
a question off topic.. to each TextField I need a TextEditingController unique?
– Ricardo Bocchi
Nov 2 '17 at 17:36
a question off topic.. to each TextField I need a TextEditingController unique?
– Ricardo Bocchi
Nov 2 '17 at 17:36
@RicardoBocchi Yes
– aziza
Nov 2 '17 at 19:59
@RicardoBocchi Yes
– aziza
Nov 2 '17 at 19:59
I do not think the Dialog will work with actual example, it is confusing how will the user be redirected after the _login() is returned. Your second example though seems way more convenient. Well baked.
– aziza
Nov 2 '17 at 23:02
I do not think the Dialog will work with actual example, it is confusing how will the user be redirected after the _login() is returned. Your second example though seems way more convenient. Well baked.
– aziza
Nov 2 '17 at 23:02
Well, the Dialog is functional and requires very little modification to his original code. He could for example follow the dialog close with a
Navigator.pushNamed("/home").– Rémi Rousselet
Nov 3 '17 at 1:20
Well, the Dialog is functional and requires very little modification to his original code. He could for example follow the dialog close with a
Navigator.pushNamed("/home").– Rémi Rousselet
Nov 3 '17 at 1:20
|
show 3 more comments
13
For me, one neat way to do this is to show a SnackBar at the bottom while the Signing-In process is taken place, this is a an example of what I mean:
Here is how to setup the SnackBar.
Define a global key for your Scaffold
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
Add it to your Scaffold key attribute
return new Scaffold(
key: _scaffoldKey,
.......
My SignIn button onPressed callback:
onPressed: () {
_scaffoldKey.currentState.showSnackBar(
new SnackBar(duration: new Duration(seconds: 4), content:
new Row(
children: <Widget>[
new CircularProgressIndicator(),
new Text(" Signing-In...")
],
),
));
_handleSignIn()
.whenComplete(() =>
Navigator.of(context).pushNamed("/Home")
);
}
It really depends on how you want to build your layout, and I am not sure what you have in mind.
Edit
You probably want it this way, I have used a Stack to achieve this result and just show or hide my indicator based on onPressed
class TestSignInView extends StatefulWidget {
@override
_TestSignInViewState createState() => new _TestSignInViewState();
}
class _TestSignInViewState extends State<TestSignInView> {
bool _load = false;
@override
Widget build(BuildContext context) {
Widget loadingIndicator =_load? new Container(
color: Colors.grey[300],
width: 70.0,
height: 70.0,
child: new Padding(padding: const EdgeInsets.all(5.0),child: new Center(child: new CircularProgressIndicator())),
):new Container();
return new Scaffold(
backgroundColor: Colors.white,
body: new Stack(children: <Widget>[new Padding(
padding: const EdgeInsets.symmetric(vertical: 50.0, horizontal: 20.0),
child: new ListView(
children: <Widget>[
new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center
,children: <Widget>[
new TextField(),
new TextField(),
new FlatButton(color:Colors.blue,child: new Text('Sign In'),
onPressed: () {
setState((){
_load=true;
});
//Navigator.of(context).push(new MaterialPageRoute(builder: (_)=>new HomeTest()));
}
),
],),],
),),
new Align(child: loadingIndicator,alignment: FractionalOffset.center,),
],));
}
}
answered Nov 2 '17 at 0:43
azizaaziza
8,18222847
Hi, that's what I wanted to do, but I was not getting the layout I needed. Stack is the answer. About StatefulWidget, is it correct build all view when progress state change?
– Ricardo Bocchi
Nov 2 '17 at 1:41
Hey, I do not understand your question?
– aziza
Nov 2 '17 at 1:46
In my code, when_loadingchange, all views are rebuild. Is that so?
– Ricardo Bocchi
Nov 2 '17 at 1:52
1
Using a modal is probably much easier and more intuitive at the same time. You can just push a loading dialog at the beggining or your request, and pop it when finished. It also has the advantage of preventing further user input.
– Rémi Rousselet
Nov 2 '17 at 9:12
1
Okey, let me bake something.
– Rémi Rousselet
Nov 2 '17 at 9:18
|
show 3 more comments
13
For me, one neat way to do this is to show a SnackBar at the bottom while the Signing-In process is taken place, this is a an example of what I mean:
Here is how to setup the SnackBar.
Define a global key for your Scaffold
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
Add it to your Scaffold key attribute
return new Scaffold(
key: _scaffoldKey,
.......
My SignIn button onPressed callback:
onPressed: () {
_scaffoldKey.currentState.showSnackBar(
new SnackBar(duration: new Duration(seconds: 4), content:
new Row(
children: <Widget>[
new CircularProgressIndicator(),
new Text(" Signing-In...")
],
),
));
_handleSignIn()
.whenComplete(() =>
Navigator.of(context).pushNamed("/Home")
);
}
It really depends on how you want to build your layout, and I am not sure what you have in mind.
Edit
You probably want it this way, I have used a Stack to achieve this result and just show or hide my indicator based on onPressed
class TestSignInView extends StatefulWidget {
@override
_TestSignInViewState createState() => new _TestSignInViewState();
}
class _TestSignInViewState extends State<TestSignInView> {
bool _load = false;
@override
Widget build(BuildContext context) {
Widget loadingIndicator =_load? new Container(
color: Colors.grey[300],
width: 70.0,
height: 70.0,
child: new Padding(padding: const EdgeInsets.all(5.0),child: new Center(child: new CircularProgressIndicator())),
):new Container();
return new Scaffold(
backgroundColor: Colors.white,
body: new Stack(children: <Widget>[new Padding(
padding: const EdgeInsets.symmetric(vertical: 50.0, horizontal: 20.0),
child: new ListView(
children: <Widget>[
new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center
,children: <Widget>[
new TextField(),
new TextField(),
new FlatButton(color:Colors.blue,child: new Text('Sign In'),
onPressed: () {
setState((){
_load=true;
});
//Navigator.of(context).push(new MaterialPageRoute(builder: (_)=>new HomeTest()));
}
),
],),],
),),
new Align(child: loadingIndicator,alignment: FractionalOffset.center,),
],));
}
}
answered Nov 2 '17 at 0:43
azizaaziza
8,18222847
Hi, that's what I wanted to do, but I was not getting the layout I needed. Stack is the answer. About StatefulWidget, is it correct build all view when progress state change?
– Ricardo Bocchi
Nov 2 '17 at 1:41
Hey, I do not understand your question?
– aziza
Nov 2 '17 at 1:46
In my code, when_loadingchange, all views are rebuild. Is that so?
– Ricardo Bocchi
Nov 2 '17 at 1:52
1
Using a modal is probably much easier and more intuitive at the same time. You can just push a loading dialog at the beggining or your request, and pop it when finished. It also has the advantage of preventing further user input.
– Rémi Rousselet
Nov 2 '17 at 9:12
1
Okey, let me bake something.
– Rémi Rousselet
Nov 2 '17 at 9:18
|
show 3 more comments
13
13
13
For me, one neat way to do this is to show a SnackBar at the bottom while the Signing-In process is taken place, this is a an example of what I mean:
Here is how to setup the SnackBar.
Define a global key for your Scaffold
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
Add it to your Scaffold key attribute
return new Scaffold(
key: _scaffoldKey,
.......
My SignIn button onPressed callback:
onPressed: () {
_scaffoldKey.currentState.showSnackBar(
new SnackBar(duration: new Duration(seconds: 4), content:
new Row(
children: <Widget>[
new CircularProgressIndicator(),
new Text(" Signing-In...")
],
),
));
_handleSignIn()
.whenComplete(() =>
Navigator.of(context).pushNamed("/Home")
);
}
It really depends on how you want to build your layout, and I am not sure what you have in mind.
Edit
You probably want it this way, I have used a Stack to achieve this result and just show or hide my indicator based on onPressed
class TestSignInView extends StatefulWidget {
@override
_TestSignInViewState createState() => new _TestSignInViewState();
}
class _TestSignInViewState extends State<TestSignInView> {
bool _load = false;
@override
Widget build(BuildContext context) {
Widget loadingIndicator =_load? new Container(
color: Colors.grey[300],
width: 70.0,
height: 70.0,
child: new Padding(padding: const EdgeInsets.all(5.0),child: new Center(child: new CircularProgressIndicator())),
):new Container();
return new Scaffold(
backgroundColor: Colors.white,
body: new Stack(children: <Widget>[new Padding(
padding: const EdgeInsets.symmetric(vertical: 50.0, horizontal: 20.0),
child: new ListView(
children: <Widget>[
new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center
,children: <Widget>[
new TextField(),
new TextField(),
new FlatButton(color:Colors.blue,child: new Text('Sign In'),
onPressed: () {
setState((){
_load=true;
});
//Navigator.of(context).push(new MaterialPageRoute(builder: (_)=>new HomeTest()));
}
),
],),],
),),
new Align(child: loadingIndicator,alignment: FractionalOffset.center,),
],));
}
}
answered Nov 2 '17 at 0:43
azizaaziza
8,18222847
For me, one neat way to do this is to show a SnackBar at the bottom while the Signing-In process is taken place, this is a an example of what I mean:
Here is how to setup the SnackBar.
Define a global key for your Scaffold
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
Add it to your Scaffold key attribute
return new Scaffold(
key: _scaffoldKey,
.......
My SignIn button onPressed callback:
onPressed: () {
_scaffoldKey.currentState.showSnackBar(
new SnackBar(duration: new Duration(seconds: 4), content:
new Row(
children: <Widget>[
new CircularProgressIndicator(),
new Text(" Signing-In...")
],
),
));
_handleSignIn()
.whenComplete(() =>
Navigator.of(context).pushNamed("/Home")
);
}
It really depends on how you want to build your layout, and I am not sure what you have in mind.
Edit
You probably want it this way, I have used a Stack to achieve this result and just show or hide my indicator based on onPressed
class TestSignInView extends StatefulWidget {
@override
_TestSignInViewState createState() => new _TestSignInViewState();
}
class _TestSignInViewState extends State<TestSignInView> {
bool _load = false;
@override
Widget build(BuildContext context) {
Widget loadingIndicator =_load? new Container(
color: Colors.grey[300],
width: 70.0,
height: 70.0,
child: new Padding(padding: const EdgeInsets.all(5.0),child: new Center(child: new CircularProgressIndicator())),
):new Container();
return new Scaffold(
backgroundColor: Colors.white,
body: new Stack(children: <Widget>[new Padding(
padding: const EdgeInsets.symmetric(vertical: 50.0, horizontal: 20.0),
child: new ListView(
children: <Widget>[
new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center
,children: <Widget>[
new TextField(),
new TextField(),
new FlatButton(color:Colors.blue,child: new Text('Sign In'),
onPressed: () {
setState((){
_load=true;
});
//Navigator.of(context).push(new MaterialPageRoute(builder: (_)=>new HomeTest()));
}
),
],),],
),),
new Align(child: loadingIndicator,alignment: FractionalOffset.center,),
],));
}
}
answered Nov 2 '17 at 0:43
azizaaziza
8,18222847
edited Nov 2 '17 at 1:29
answered Nov 2 '17 at 0:43
azizaaziza
8,18222847
answered Nov 2 '17 at 0:43
azizaaziza
8,18222847
answered Nov 2 '17 at 0:43
azizaaziza
8,18222847
8,18222847
Hi, that's what I wanted to do, but I was not getting the layout I needed. Stack is the answer. About StatefulWidget, is it correct build all view when progress state change?
– Ricardo Bocchi
Nov 2 '17 at 1:41
Hey, I do not understand your question?
– aziza
Nov 2 '17 at 1:46
In my code, when_loadingchange, all views are rebuild. Is that so?
– Ricardo Bocchi
Nov 2 '17 at 1:52
1
Using a modal is probably much easier and more intuitive at the same time. You can just push a loading dialog at the beggining or your request, and pop it when finished. It also has the advantage of preventing further user input.
– Rémi Rousselet
Nov 2 '17 at 9:12
1
Okey, let me bake something.
– Rémi Rousselet
Nov 2 '17 at 9:18
|
show 3 more comments
Hi, that's what I wanted to do, but I was not getting the layout I needed. Stack is the answer. About StatefulWidget, is it correct build all view when progress state change?
– Ricardo Bocchi
Nov 2 '17 at 1:41
Hey, I do not understand your question?
– aziza
Nov 2 '17 at 1:46
In my code, when_loadingchange, all views are rebuild. Is that so?
– Ricardo Bocchi
Nov 2 '17 at 1:52
1
Using a modal is probably much easier and more intuitive at the same time. You can just push a loading dialog at the beggining or your request, and pop it when finished. It also has the advantage of preventing further user input.
– Rémi Rousselet
Nov 2 '17 at 9:12
1
Okey, let me bake something.
– Rémi Rousselet
Nov 2 '17 at 9:18
Hi, that's what I wanted to do, but I was not getting the layout I needed. Stack is the answer. About StatefulWidget, is it correct build all view when progress state change?
– Ricardo Bocchi
Nov 2 '17 at 1:41
Hi, that's what I wanted to do, but I was not getting the layout I needed. Stack is the answer. About StatefulWidget, is it correct build all view when progress state change?
– Ricardo Bocchi
Nov 2 '17 at 1:41
Hey, I do not understand your question?
– aziza
Nov 2 '17 at 1:46
Hey, I do not understand your question?
– aziza
Nov 2 '17 at 1:46
In my code, when
_loading change, all views are rebuild. Is that so?– Ricardo Bocchi
Nov 2 '17 at 1:52
In my code, when
_loading change, all views are rebuild. Is that so?– Ricardo Bocchi
Nov 2 '17 at 1:52
1
1
Using a modal is probably much easier and more intuitive at the same time. You can just push a loading dialog at the beggining or your request, and pop it when finished. It also has the advantage of preventing further user input.
– Rémi Rousselet
Nov 2 '17 at 9:12
Using a modal is probably much easier and more intuitive at the same time. You can just push a loading dialog at the beggining or your request, and pop it when finished. It also has the advantage of preventing further user input.
– Rémi Rousselet
Nov 2 '17 at 9:12
1
1
Okey, let me bake something.
– Rémi Rousselet
Nov 2 '17 at 9:18
Okey, let me bake something.
– Rémi Rousselet
Nov 2 '17 at 9:18
|
show 3 more comments
6
1. Without plugin
class IndiSampleState extends State<ProgHudPage> {
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Demo'),
),
body: Center(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async {
showDialog(
context: context,
builder: (BuildContext context) {
return Center(child: CircularProgressIndicator(),);
});
await loginAction();
Navigator.pop(context);
},
),
));
}
Future<bool> loginAction() async {
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
2. With plugin
check this plugin progress_hud
add the dependency in the pubspec.yaml file
dev_dependencies:
progress_hud:
import the package
import 'package:progress_hud/progress_hud.dart';
Sample code is given below to show and hide the indicator
class ProgHudPage extends StatefulWidget {
@override
_ProgHudPageState createState() => _ProgHudPageState();
}
class _ProgHudPageState extends State<ProgHudPage> {
ProgressHUD _progressHUD;
@override
void initState() {
_progressHUD = new ProgressHUD(
backgroundColor: Colors.black12,
color: Colors.white,
containerColor: Colors.blue,
borderRadius: 5.0,
loading: false,
text: 'Loading...',
);
super.initState();
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('ProgressHUD Demo'),
),
body: new Stack(
children: <Widget>[
_progressHUD,
new Positioned(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async{
_progressHUD.state.show();
await loginAction();
_progressHUD.state.dismiss();
},
),
bottom: 30.0,
right: 10.0)
],
));
}
Future<bool> loginAction()async{
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
answered Mar 21 '18 at 9:40
Shyju MShyju M
1,1171018
3
Don't vote this down, some people don't want to handle the nitty-gritty details of UI and am one of them so this plugin comes in handy
– Vladtn
Apr 4 '18 at 10:19
1
Its not working.
– prashant fepale
Jul 4 '18 at 7:57
2
the progress bar in api is fair enough adding dependency increases build size. already flutter build is excessive.
– prashant0205
Jul 23 '18 at 10:25
Should you really add this as a Dev Dependency?
– George
Dec 25 '18 at 14:39
This plugin is not working!!!
– Idee
Jan 3 at 15:35
|
show 12 more comments
6
1. Without plugin
class IndiSampleState extends State<ProgHudPage> {
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Demo'),
),
body: Center(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async {
showDialog(
context: context,
builder: (BuildContext context) {
return Center(child: CircularProgressIndicator(),);
});
await loginAction();
Navigator.pop(context);
},
),
));
}
Future<bool> loginAction() async {
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
2. With plugin
check this plugin progress_hud
add the dependency in the pubspec.yaml file
dev_dependencies:
progress_hud:
import the package
import 'package:progress_hud/progress_hud.dart';
Sample code is given below to show and hide the indicator
class ProgHudPage extends StatefulWidget {
@override
_ProgHudPageState createState() => _ProgHudPageState();
}
class _ProgHudPageState extends State<ProgHudPage> {
ProgressHUD _progressHUD;
@override
void initState() {
_progressHUD = new ProgressHUD(
backgroundColor: Colors.black12,
color: Colors.white,
containerColor: Colors.blue,
borderRadius: 5.0,
loading: false,
text: 'Loading...',
);
super.initState();
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('ProgressHUD Demo'),
),
body: new Stack(
children: <Widget>[
_progressHUD,
new Positioned(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async{
_progressHUD.state.show();
await loginAction();
_progressHUD.state.dismiss();
},
),
bottom: 30.0,
right: 10.0)
],
));
}
Future<bool> loginAction()async{
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
answered Mar 21 '18 at 9:40
Shyju MShyju M
1,1171018
3
Don't vote this down, some people don't want to handle the nitty-gritty details of UI and am one of them so this plugin comes in handy
– Vladtn
Apr 4 '18 at 10:19
1
Its not working.
– prashant fepale
Jul 4 '18 at 7:57
2
the progress bar in api is fair enough adding dependency increases build size. already flutter build is excessive.
– prashant0205
Jul 23 '18 at 10:25
Should you really add this as a Dev Dependency?
– George
Dec 25 '18 at 14:39
This plugin is not working!!!
– Idee
Jan 3 at 15:35
|
show 12 more comments
6
6
6
1. Without plugin
class IndiSampleState extends State<ProgHudPage> {
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Demo'),
),
body: Center(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async {
showDialog(
context: context,
builder: (BuildContext context) {
return Center(child: CircularProgressIndicator(),);
});
await loginAction();
Navigator.pop(context);
},
),
));
}
Future<bool> loginAction() async {
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
2. With plugin
check this plugin progress_hud
add the dependency in the pubspec.yaml file
dev_dependencies:
progress_hud:
import the package
import 'package:progress_hud/progress_hud.dart';
Sample code is given below to show and hide the indicator
class ProgHudPage extends StatefulWidget {
@override
_ProgHudPageState createState() => _ProgHudPageState();
}
class _ProgHudPageState extends State<ProgHudPage> {
ProgressHUD _progressHUD;
@override
void initState() {
_progressHUD = new ProgressHUD(
backgroundColor: Colors.black12,
color: Colors.white,
containerColor: Colors.blue,
borderRadius: 5.0,
loading: false,
text: 'Loading...',
);
super.initState();
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('ProgressHUD Demo'),
),
body: new Stack(
children: <Widget>[
_progressHUD,
new Positioned(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async{
_progressHUD.state.show();
await loginAction();
_progressHUD.state.dismiss();
},
),
bottom: 30.0,
right: 10.0)
],
));
}
Future<bool> loginAction()async{
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
answered Mar 21 '18 at 9:40
Shyju MShyju M
1,1171018
1. Without plugin
class IndiSampleState extends State<ProgHudPage> {
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Demo'),
),
body: Center(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async {
showDialog(
context: context,
builder: (BuildContext context) {
return Center(child: CircularProgressIndicator(),);
});
await loginAction();
Navigator.pop(context);
},
),
));
}
Future<bool> loginAction() async {
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
2. With plugin
check this plugin progress_hud
add the dependency in the pubspec.yaml file
dev_dependencies:
progress_hud:
import the package
import 'package:progress_hud/progress_hud.dart';
Sample code is given below to show and hide the indicator
class ProgHudPage extends StatefulWidget {
@override
_ProgHudPageState createState() => _ProgHudPageState();
}
class _ProgHudPageState extends State<ProgHudPage> {
ProgressHUD _progressHUD;
@override
void initState() {
_progressHUD = new ProgressHUD(
backgroundColor: Colors.black12,
color: Colors.white,
containerColor: Colors.blue,
borderRadius: 5.0,
loading: false,
text: 'Loading...',
);
super.initState();
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('ProgressHUD Demo'),
),
body: new Stack(
children: <Widget>[
_progressHUD,
new Positioned(
child: RaisedButton(
color: Colors.blueAccent,
child: Text('Login'),
onPressed: () async{
_progressHUD.state.show();
await loginAction();
_progressHUD.state.dismiss();
},
),
bottom: 30.0,
right: 10.0)
],
));
}
Future<bool> loginAction()async{
//replace the below line of code with your login request
await new Future.delayed(const Duration(seconds: 2));
return true;
}
}
answered Mar 21 '18 at 9:40
Shyju MShyju M
1,1171018
edited Jan 30 at 17:05
answered Mar 21 '18 at 9:40
Shyju MShyju M
1,1171018
answered Mar 21 '18 at 9:40
Shyju MShyju M
1,1171018
answered Mar 21 '18 at 9:40
Shyju MShyju M
1,1171018
1,1171018
3
Don't vote this down, some people don't want to handle the nitty-gritty details of UI and am one of them so this plugin comes in handy
– Vladtn
Apr 4 '18 at 10:19
1
Its not working.
– prashant fepale
Jul 4 '18 at 7:57
2
the progress bar in api is fair enough adding dependency increases build size. already flutter build is excessive.
– prashant0205
Jul 23 '18 at 10:25
Should you really add this as a Dev Dependency?
– George
Dec 25 '18 at 14:39
This plugin is not working!!!
– Idee
Jan 3 at 15:35
|
show 12 more comments
3
Don't vote this down, some people don't want to handle the nitty-gritty details of UI and am one of them so this plugin comes in handy
– Vladtn
Apr 4 '18 at 10:19
1
Its not working.
– prashant fepale
Jul 4 '18 at 7:57
2
the progress bar in api is fair enough adding dependency increases build size. already flutter build is excessive.
– prashant0205
Jul 23 '18 at 10:25
Should you really add this as a Dev Dependency?
– George
Dec 25 '18 at 14:39
This plugin is not working!!!
– Idee
Jan 3 at 15:35
3
3
Don't vote this down, some people don't want to handle the nitty-gritty details of UI and am one of them so this plugin comes in handy
– Vladtn
Apr 4 '18 at 10:19
Don't vote this down, some people don't want to handle the nitty-gritty details of UI and am one of them so this plugin comes in handy
– Vladtn
Apr 4 '18 at 10:19
1
1
Its not working.
– prashant fepale
Jul 4 '18 at 7:57
Its not working.
– prashant fepale
Jul 4 '18 at 7:57
2
2
the progress bar in api is fair enough adding dependency increases build size. already flutter build is excessive.
– prashant0205
Jul 23 '18 at 10:25
the progress bar in api is fair enough adding dependency increases build size. already flutter build is excessive.
– prashant0205
Jul 23 '18 at 10:25
Should you really add this as a Dev Dependency?
– George
Dec 25 '18 at 14:39
Should you really add this as a Dev Dependency?
– George
Dec 25 '18 at 14:39
This plugin is not working!!!
– Idee
Jan 3 at 15:35
This plugin is not working!!!
– Idee
Jan 3 at 15:35
|
show 12 more comments
5
Create a bool isLoading and set it to false. With the help of ternary operator, When user clicks on login button set state of isLoading to true. You will get circular loading indicator in place of login button
isLoading ? new PrimaryButton(
key: new Key('login'),
text: 'Login',
height: 44.0,
onPressed: SetState((){isLoading = ture;}))
: Center(
child: CircularProgressIndicator(),
),
You can see Screenshots how it looks while before login clicked
After login clicked
In mean time you can run login process and login user. If user credentials are wrong then again you will setState of isLoading to false, such that loading indicator will become invisible and login button visible to user.
By the way, primaryButton used in code is my custom button. You can do same with OnPressed in button.
answered Nov 27 '18 at 9:57
Harsha pulikolluHarsha pulikollu
17218
That's actually pretty smart! No need to handle double click etc. Thanks.
– Benobab
Feb 2 at 21:03
add a comment |
5
Create a bool isLoading and set it to false. With the help of ternary operator, When user clicks on login button set state of isLoading to true. You will get circular loading indicator in place of login button
isLoading ? new PrimaryButton(
key: new Key('login'),
text: 'Login',
height: 44.0,
onPressed: SetState((){isLoading = ture;}))
: Center(
child: CircularProgressIndicator(),
),
You can see Screenshots how it looks while before login clicked
After login clicked
In mean time you can run login process and login user. If user credentials are wrong then again you will setState of isLoading to false, such that loading indicator will become invisible and login button visible to user.
By the way, primaryButton used in code is my custom button. You can do same with OnPressed in button.
answered Nov 27 '18 at 9:57
Harsha pulikolluHarsha pulikollu
17218
That's actually pretty smart! No need to handle double click etc. Thanks.
– Benobab
Feb 2 at 21:03
add a comment |
5
5
5
Create a bool isLoading and set it to false. With the help of ternary operator, When user clicks on login button set state of isLoading to true. You will get circular loading indicator in place of login button
isLoading ? new PrimaryButton(
key: new Key('login'),
text: 'Login',
height: 44.0,
onPressed: SetState((){isLoading = ture;}))
: Center(
child: CircularProgressIndicator(),
),
You can see Screenshots how it looks while before login clicked
After login clicked
In mean time you can run login process and login user. If user credentials are wrong then again you will setState of isLoading to false, such that loading indicator will become invisible and login button visible to user.
By the way, primaryButton used in code is my custom button. You can do same with OnPressed in button.
answered Nov 27 '18 at 9:57
Harsha pulikolluHarsha pulikollu
17218
Create a bool isLoading and set it to false. With the help of ternary operator, When user clicks on login button set state of isLoading to true. You will get circular loading indicator in place of login button
isLoading ? new PrimaryButton(
key: new Key('login'),
text: 'Login',
height: 44.0,
onPressed: SetState((){isLoading = ture;}))
: Center(
child: CircularProgressIndicator(),
),
You can see Screenshots how it looks while before login clicked
After login clicked
In mean time you can run login process and login user. If user credentials are wrong then again you will setState of isLoading to false, such that loading indicator will become invisible and login button visible to user.
By the way, primaryButton used in code is my custom button. You can do same with OnPressed in button.
answered Nov 27 '18 at 9:57
Harsha pulikolluHarsha pulikollu
17218
answered Nov 27 '18 at 9:57
Harsha pulikolluHarsha pulikollu
17218
answered Nov 27 '18 at 9:57
Harsha pulikolluHarsha pulikollu
17218
answered Nov 27 '18 at 9:57
Harsha pulikolluHarsha pulikollu
17218
17218
That's actually pretty smart! No need to handle double click etc. Thanks.
– Benobab
Feb 2 at 21:03
add a comment |
That's actually pretty smart! No need to handle double click etc. Thanks.
– Benobab
Feb 2 at 21:03
That's actually pretty smart! No need to handle double click etc. Thanks.
– Benobab
Feb 2 at 21:03
That's actually pretty smart! No need to handle double click etc. Thanks.
– Benobab
Feb 2 at 21:03
add a comment |
3
I took the following approach, which uses a simple modal progress indicator widget that wraps whatever you want to make modal during an async call.
The example in the package also addresses how to handle form validation while making async calls to validate the form (see flutter/issues/9688 for details of this problem). For example, without leaving the form, this async form validation method can be used to validate a new user name against existing names in a database while signing up.
https://pub.dartlang.org/packages/modal_progress_hud
Here is the demo of the example provided with the package (with source code):
Example could be adapted to other modal progress indicator behaviour (like different animations, additional text in modal, etc..).
answered Jul 12 '18 at 13:59
mmccabemmccabe
1,1001016
add a comment |
3
I took the following approach, which uses a simple modal progress indicator widget that wraps whatever you want to make modal during an async call.
The example in the package also addresses how to handle form validation while making async calls to validate the form (see flutter/issues/9688 for details of this problem). For example, without leaving the form, this async form validation method can be used to validate a new user name against existing names in a database while signing up.
https://pub.dartlang.org/packages/modal_progress_hud
Here is the demo of the example provided with the package (with source code):
Example could be adapted to other modal progress indicator behaviour (like different animations, additional text in modal, etc..).
answered Jul 12 '18 at 13:59
mmccabemmccabe
1,1001016
add a comment |
3
3
3
I took the following approach, which uses a simple modal progress indicator widget that wraps whatever you want to make modal during an async call.
The example in the package also addresses how to handle form validation while making async calls to validate the form (see flutter/issues/9688 for details of this problem). For example, without leaving the form, this async form validation method can be used to validate a new user name against existing names in a database while signing up.
https://pub.dartlang.org/packages/modal_progress_hud
Here is the demo of the example provided with the package (with source code):
Example could be adapted to other modal progress indicator behaviour (like different animations, additional text in modal, etc..).
answered Jul 12 '18 at 13:59
mmccabemmccabe
1,1001016
I took the following approach, which uses a simple modal progress indicator widget that wraps whatever you want to make modal during an async call.
The example in the package also addresses how to handle form validation while making async calls to validate the form (see flutter/issues/9688 for details of this problem). For example, without leaving the form, this async form validation method can be used to validate a new user name against existing names in a database while signing up.
https://pub.dartlang.org/packages/modal_progress_hud
Here is the demo of the example provided with the package (with source code):
Example could be adapted to other modal progress indicator behaviour (like different animations, additional text in modal, etc..).
answered Jul 12 '18 at 13:59
mmccabemmccabe
1,1001016
answered Jul 12 '18 at 13:59
mmccabemmccabe
1,1001016
answered Jul 12 '18 at 13:59
mmccabemmccabe
1,1001016
answered Jul 12 '18 at 13:59
mmccabemmccabe
1,1001016
1,1001016
add a comment |
add a comment |
0
This is my solution with stack
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'dart:async';
final themeColor = new Color(0xfff5a623);
final primaryColor = new Color(0xff203152);
final greyColor = new Color(0xffaeaeae);
final greyColor2 = new Color(0xffE8E8E8);
class LoadindScreen extends StatefulWidget {
LoadindScreen({Key key, this.title}) : super(key: key);
final String title;
@override
LoginScreenState createState() => new LoginScreenState();
}
class LoginScreenState extends State<LoadindScreen> {
SharedPreferences prefs;
bool isLoading = false;
Future<Null> handleSignIn() async {
setState(() {
isLoading = true;
});
prefs = await SharedPreferences.getInstance();
var isLoadingFuture = Future.delayed(const Duration(seconds: 3), () {
return false;
});
isLoadingFuture.then((response) {
setState(() {
isLoading = response;
});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
widget.title,
style: TextStyle(color: primaryColor, fontWeight: FontWeight.bold),
),
centerTitle: true,
),
body: Stack(
children: <Widget>[
Center(
child: FlatButton(
onPressed: handleSignIn,
child: Text(
'SIGN IN WITH GOOGLE',
style: TextStyle(fontSize: 16.0),
),
color: Color(0xffdd4b39),
highlightColor: Color(0xffff7f7f),
splashColor: Colors.transparent,
textColor: Colors.white,
padding: EdgeInsets.fromLTRB(30.0, 15.0, 30.0, 15.0)),
),
// Loading
Positioned(
child: isLoading
? Container(
child: Center(
child: CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(themeColor),
),
),
color: Colors.white.withOpacity(0.8),
)
: Container(),
),
],
));
}
}
answered Aug 27 '18 at 3:56
kokemomukekokemomuke
344510
add a comment |
0
This is my solution with stack
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'dart:async';
final themeColor = new Color(0xfff5a623);
final primaryColor = new Color(0xff203152);
final greyColor = new Color(0xffaeaeae);
final greyColor2 = new Color(0xffE8E8E8);
class LoadindScreen extends StatefulWidget {
LoadindScreen({Key key, this.title}) : super(key: key);
final String title;
@override
LoginScreenState createState() => new LoginScreenState();
}
class LoginScreenState extends State<LoadindScreen> {
SharedPreferences prefs;
bool isLoading = false;
Future<Null> handleSignIn() async {
setState(() {
isLoading = true;
});
prefs = await SharedPreferences.getInstance();
var isLoadingFuture = Future.delayed(const Duration(seconds: 3), () {
return false;
});
isLoadingFuture.then((response) {
setState(() {
isLoading = response;
});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
widget.title,
style: TextStyle(color: primaryColor, fontWeight: FontWeight.bold),
),
centerTitle: true,
),
body: Stack(
children: <Widget>[
Center(
child: FlatButton(
onPressed: handleSignIn,
child: Text(
'SIGN IN WITH GOOGLE',
style: TextStyle(fontSize: 16.0),
),
color: Color(0xffdd4b39),
highlightColor: Color(0xffff7f7f),
splashColor: Colors.transparent,
textColor: Colors.white,
padding: EdgeInsets.fromLTRB(30.0, 15.0, 30.0, 15.0)),
),
// Loading
Positioned(
child: isLoading
? Container(
child: Center(
child: CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(themeColor),
),
),
color: Colors.white.withOpacity(0.8),
)
: Container(),
),
],
));
}
}
answered Aug 27 '18 at 3:56
kokemomukekokemomuke
344510
add a comment |
0
0
0
This is my solution with stack
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'dart:async';
final themeColor = new Color(0xfff5a623);
final primaryColor = new Color(0xff203152);
final greyColor = new Color(0xffaeaeae);
final greyColor2 = new Color(0xffE8E8E8);
class LoadindScreen extends StatefulWidget {
LoadindScreen({Key key, this.title}) : super(key: key);
final String title;
@override
LoginScreenState createState() => new LoginScreenState();
}
class LoginScreenState extends State<LoadindScreen> {
SharedPreferences prefs;
bool isLoading = false;
Future<Null> handleSignIn() async {
setState(() {
isLoading = true;
});
prefs = await SharedPreferences.getInstance();
var isLoadingFuture = Future.delayed(const Duration(seconds: 3), () {
return false;
});
isLoadingFuture.then((response) {
setState(() {
isLoading = response;
});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
widget.title,
style: TextStyle(color: primaryColor, fontWeight: FontWeight.bold),
),
centerTitle: true,
),
body: Stack(
children: <Widget>[
Center(
child: FlatButton(
onPressed: handleSignIn,
child: Text(
'SIGN IN WITH GOOGLE',
style: TextStyle(fontSize: 16.0),
),
color: Color(0xffdd4b39),
highlightColor: Color(0xffff7f7f),
splashColor: Colors.transparent,
textColor: Colors.white,
padding: EdgeInsets.fromLTRB(30.0, 15.0, 30.0, 15.0)),
),
// Loading
Positioned(
child: isLoading
? Container(
child: Center(
child: CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(themeColor),
),
),
color: Colors.white.withOpacity(0.8),
)
: Container(),
),
],
));
}
}
answered Aug 27 '18 at 3:56
kokemomukekokemomuke
344510
This is my solution with stack
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'dart:async';
final themeColor = new Color(0xfff5a623);
final primaryColor = new Color(0xff203152);
final greyColor = new Color(0xffaeaeae);
final greyColor2 = new Color(0xffE8E8E8);
class LoadindScreen extends StatefulWidget {
LoadindScreen({Key key, this.title}) : super(key: key);
final String title;
@override
LoginScreenState createState() => new LoginScreenState();
}
class LoginScreenState extends State<LoadindScreen> {
SharedPreferences prefs;
bool isLoading = false;
Future<Null> handleSignIn() async {
setState(() {
isLoading = true;
});
prefs = await SharedPreferences.getInstance();
var isLoadingFuture = Future.delayed(const Duration(seconds: 3), () {
return false;
});
isLoadingFuture.then((response) {
setState(() {
isLoading = response;
});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
widget.title,
style: TextStyle(color: primaryColor, fontWeight: FontWeight.bold),
),
centerTitle: true,
),
body: Stack(
children: <Widget>[
Center(
child: FlatButton(
onPressed: handleSignIn,
child: Text(
'SIGN IN WITH GOOGLE',
style: TextStyle(fontSize: 16.0),
),
color: Color(0xffdd4b39),
highlightColor: Color(0xffff7f7f),
splashColor: Colors.transparent,
textColor: Colors.white,
padding: EdgeInsets.fromLTRB(30.0, 15.0, 30.0, 15.0)),
),
// Loading
Positioned(
child: isLoading
? Container(
child: Center(
child: CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(themeColor),
),
),
color: Colors.white.withOpacity(0.8),
)
: Container(),
),
],
));
}
}
answered Aug 27 '18 at 3:56
kokemomukekokemomuke
344510
answered Aug 27 '18 at 3:56
kokemomukekokemomuke
344510
answered Aug 27 '18 at 3:56
kokemomukekokemomuke
344510
answered Aug 27 '18 at 3:56
kokemomukekokemomuke
344510
344510
add a comment |
add a comment |
0
You can use FutureBuilder widget instead. This takes an argument which must be a Future. Then you can use a snapshot which is the state at the time being of the async call when loging in, once it ends the state of the async function return will be updated and the future builder will rebuild itself so you can then ask for the new state.
FutureBuilder(
future: myFutureFunction(),
builder: (context, AsyncSnapshot<List<item>> snapshot) {
if (!snapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
} else {
//Send the user to the next page.
},
);
Here you have an example on how to build a Future
Future<void> myFutureFunction() async{
await callToApi();}
answered Nov 26 '18 at 19:46
MatiasMatias
342312
add a comment |
0
You can use FutureBuilder widget instead. This takes an argument which must be a Future. Then you can use a snapshot which is the state at the time being of the async call when loging in, once it ends the state of the async function return will be updated and the future builder will rebuild itself so you can then ask for the new state.
FutureBuilder(
future: myFutureFunction(),
builder: (context, AsyncSnapshot<List<item>> snapshot) {
if (!snapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
} else {
//Send the user to the next page.
},
);
Here you have an example on how to build a Future
Future<void> myFutureFunction() async{
await callToApi();}
answered Nov 26 '18 at 19:46
MatiasMatias
342312
add a comment |
0
0
0
You can use FutureBuilder widget instead. This takes an argument which must be a Future. Then you can use a snapshot which is the state at the time being of the async call when loging in, once it ends the state of the async function return will be updated and the future builder will rebuild itself so you can then ask for the new state.
FutureBuilder(
future: myFutureFunction(),
builder: (context, AsyncSnapshot<List<item>> snapshot) {
if (!snapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
} else {
//Send the user to the next page.
},
);
Here you have an example on how to build a Future
Future<void> myFutureFunction() async{
await callToApi();}
answered Nov 26 '18 at 19:46
MatiasMatias
342312
You can use FutureBuilder widget instead. This takes an argument which must be a Future. Then you can use a snapshot which is the state at the time being of the async call when loging in, once it ends the state of the async function return will be updated and the future builder will rebuild itself so you can then ask for the new state.
FutureBuilder(
future: myFutureFunction(),
builder: (context, AsyncSnapshot<List<item>> snapshot) {
if (!snapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
} else {
//Send the user to the next page.
},
);
Here you have an example on how to build a Future
Future<void> myFutureFunction() async{
await callToApi();}
answered Nov 26 '18 at 19:46
MatiasMatias
342312
answered Nov 26 '18 at 19:46
MatiasMatias
342312
answered Nov 26 '18 at 19:46
MatiasMatias
342312
answered Nov 26 '18 at 19:46
MatiasMatias
342312
342312
add a comment |
add a comment |
0
class Loader extends StatefulWidget {
@override
State createState() => LoaderState();
}
class LoaderState extends State<Loader> with SingleTickerProviderStateMixin {
AnimationController controller;
Animation<double> animation;
@override
void initState() {
super.initState();
controller = AnimationController(
duration: Duration(milliseconds: 1200), vsync: this);
animation = CurvedAnimation(parent: controller, curve: Curves.elasticOut);
animation.addListener(() {
this.setState(() {});
});
animation.addStatusListener((AnimationStatus status) {});
controller.repeat();
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 100.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue[300],
height: 3.0,
width: animation.value * 75.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 50.0,
)
],
);
}
}
Expanded(
child: Padding(
padding:
EdgeInsets.only(left: 20.0, right: 5.0, top:20.0),
child: GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => FirstScreen()));
},
child: Container(
alignment: Alignment.center,
height: 45.0,
decoration: BoxDecoration(
color: Color(0xFF1976D2),
borderRadius: BorderRadius.circular(9.0)),
child: Text('Login',
style: TextStyle(
fontSize: 20.0, color: Colors.white))),
),
),
),
answered Dec 24 '18 at 21:01
Max ZubkoMax Zubko
114
How can I combine a class that creates a loading indicator with my button, so that when I press it, the indicator turns on and flips to the next page ?
– Max Zubko
Dec 24 '18 at 21:01
add a comment |
0
class Loader extends StatefulWidget {
@override
State createState() => LoaderState();
}
class LoaderState extends State<Loader> with SingleTickerProviderStateMixin {
AnimationController controller;
Animation<double> animation;
@override
void initState() {
super.initState();
controller = AnimationController(
duration: Duration(milliseconds: 1200), vsync: this);
animation = CurvedAnimation(parent: controller, curve: Curves.elasticOut);
animation.addListener(() {
this.setState(() {});
});
animation.addStatusListener((AnimationStatus status) {});
controller.repeat();
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 100.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue[300],
height: 3.0,
width: animation.value * 75.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 50.0,
)
],
);
}
}
Expanded(
child: Padding(
padding:
EdgeInsets.only(left: 20.0, right: 5.0, top:20.0),
child: GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => FirstScreen()));
},
child: Container(
alignment: Alignment.center,
height: 45.0,
decoration: BoxDecoration(
color: Color(0xFF1976D2),
borderRadius: BorderRadius.circular(9.0)),
child: Text('Login',
style: TextStyle(
fontSize: 20.0, color: Colors.white))),
),
),
),
answered Dec 24 '18 at 21:01
Max ZubkoMax Zubko
114
How can I combine a class that creates a loading indicator with my button, so that when I press it, the indicator turns on and flips to the next page ?
– Max Zubko
Dec 24 '18 at 21:01
add a comment |
0
0
0
class Loader extends StatefulWidget {
@override
State createState() => LoaderState();
}
class LoaderState extends State<Loader> with SingleTickerProviderStateMixin {
AnimationController controller;
Animation<double> animation;
@override
void initState() {
super.initState();
controller = AnimationController(
duration: Duration(milliseconds: 1200), vsync: this);
animation = CurvedAnimation(parent: controller, curve: Curves.elasticOut);
animation.addListener(() {
this.setState(() {});
});
animation.addStatusListener((AnimationStatus status) {});
controller.repeat();
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 100.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue[300],
height: 3.0,
width: animation.value * 75.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 50.0,
)
],
);
}
}
Expanded(
child: Padding(
padding:
EdgeInsets.only(left: 20.0, right: 5.0, top:20.0),
child: GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => FirstScreen()));
},
child: Container(
alignment: Alignment.center,
height: 45.0,
decoration: BoxDecoration(
color: Color(0xFF1976D2),
borderRadius: BorderRadius.circular(9.0)),
child: Text('Login',
style: TextStyle(
fontSize: 20.0, color: Colors.white))),
),
),
),
answered Dec 24 '18 at 21:01
Max ZubkoMax Zubko
114
class Loader extends StatefulWidget {
@override
State createState() => LoaderState();
}
class LoaderState extends State<Loader> with SingleTickerProviderStateMixin {
AnimationController controller;
Animation<double> animation;
@override
void initState() {
super.initState();
controller = AnimationController(
duration: Duration(milliseconds: 1200), vsync: this);
animation = CurvedAnimation(parent: controller, curve: Curves.elasticOut);
animation.addListener(() {
this.setState(() {});
});
animation.addStatusListener((AnimationStatus status) {});
controller.repeat();
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 100.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue[300],
height: 3.0,
width: animation.value * 75.0,
),
Padding(
padding: EdgeInsets.only(bottom: 5.0),
),
Container(
color: Colors.blue,
height: 3.0,
width: animation.value * 50.0,
)
],
);
}
}
Expanded(
child: Padding(
padding:
EdgeInsets.only(left: 20.0, right: 5.0, top:20.0),
child: GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => FirstScreen()));
},
child: Container(
alignment: Alignment.center,
height: 45.0,
decoration: BoxDecoration(
color: Color(0xFF1976D2),
borderRadius: BorderRadius.circular(9.0)),
child: Text('Login',
style: TextStyle(
fontSize: 20.0, color: Colors.white))),
),
),
),
answered Dec 24 '18 at 21:01
Max ZubkoMax Zubko
114
answered Dec 24 '18 at 21:01
Max ZubkoMax Zubko
114
answered Dec 24 '18 at 21:01
Max ZubkoMax Zubko
114
answered Dec 24 '18 at 21:01
Max ZubkoMax Zubko
114
114
How can I combine a class that creates a loading indicator with my button, so that when I press it, the indicator turns on and flips to the next page ?
– Max Zubko
Dec 24 '18 at 21:01
add a comment |
How can I combine a class that creates a loading indicator with my button, so that when I press it, the indicator turns on and flips to the next page ?
– Max Zubko
Dec 24 '18 at 21:01
How can I combine a class that creates a loading indicator with my button, so that when I press it, the indicator turns on and flips to the next page ?
– Max Zubko
Dec 24 '18 at 21:01
How can I combine a class that creates a loading indicator with my button, so that when I press it, the indicator turns on and flips to the next page ?
– Max Zubko
Dec 24 '18 at 21:01
add a comment |
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– SherylHohman
Nov 2 '17 at 0:09