Related
I am trying to pull user data from my UserProfileBrowse Data model and display it on my user profile edit page. Including the image. I also want to update the data into my real-time Database.
THIS IS MY DATA MODEL
class UserProfileBrowse {
String userId;
int age;
String name;
String email;
String imageUrl;
UserProfileBrowse(
this.userId,
this.age,
this.name,
this.email,
this.imageUrl,
);
Map<dynamic, dynamic> toJson() => <dynamic, dynamic>{
'userId': userId,
'age': age,
'name': name,
'email': email,
'imageUrl' : imageUrl,
};
}
THIS IS MY USER PROFILE EDIT PAGE
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../services/auth.dart';
import 'home.dart';
import 'settings.dart';
import 'package:shadow_app_project/data_models/user_profile_browse.dart';
import 'package:shadow_app_project/image_selection/user_edit_image.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_database/firebase_database.dart';
class SettingsUI extends StatelessWidget {
const SettingsUI({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return const MaterialApp(
debugShowCheckedModeBanner: false,
title: "Setting UI",
home: EditProfilePage(),
);
}
}
class EditProfilePage extends StatefulWidget {
const EditProfilePage({Key? key}) : super(key: key);
#override
_EditProfilePageState createState() => _EditProfilePageState();
}
class _EditProfilePageState extends State<EditProfilePage> {
String currentUser = (Auth().auth.currentUser as User).email.toString();
TextEditingController displayNameController = TextEditingController();
TextEditingController ageController = TextEditingController();
bool isLoading = false;
User? user;
UserProfileBrowse? userModel;
String? imageUrl;
final refDatabase = FirebaseDatabase.instance;
bool showPassword = false;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).scaffoldBackgroundColor,
elevation: 1,
leading: IconButton(
icon: const Icon(
Icons.arrow_back,
color: Colors.green,
),
onPressed: () {
Navigator.of(context).push(MaterialPageRoute(
builder: (BuildContext context) => const SettingsPage()));
},
),
actions: [
IconButton(
icon: const Icon(
Icons.settings,
color: Colors.green,
),
onPressed: () {
Navigator.of(context).push(MaterialPageRoute(
builder: (BuildContext context) => const SettingsPage()));
},
),
],
),
body: Container(
padding: const EdgeInsets.only(left: 16, top: 25, right: 16),
child: GestureDetector(
onTap: () {
FocusScope.of(context).unfocus();
},
child: ListView(
children: [
const Text(
"Edit Profile",
style: TextStyle(fontSize: 25, fontWeight: FontWeight.w500),
),
const SizedBox(
height: 15,
),
Container(
width: 130,
height: 130,
decoration: BoxDecoration(
border: Border.all(
width: 4,
color: Theme.of(context).scaffoldBackgroundColor),
boxShadow: [
BoxShadow(
spreadRadius: 2,
blurRadius: 10,
color: Colors.black.withOpacity(0.1),
offset: const Offset(0, 10))
],
shape: BoxShape.circle,
image: const DecorationImage(
fit: BoxFit.cover,
image: NetworkImage(
"https://images.pexels.com/photos/3307758/pexels-photo-3307758.jpeg?auto=compress&cs=tinysrgb&dpr=3&h=250",
))),
),
const SizedBox(
height: 35,
),
TextField(
decoration: const InputDecoration(
labelText: "Name",
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.teal)),
hintText: 'Input Name',
),
controller: displayNameController,
keyboardType: TextInputType.name,
),
TextField(
decoration: const InputDecoration(
labelText: "Age",
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.teal)),
hintText: 'Input Age',
),
controller: ageController,
//
keyboardType: TextInputType.number,
),
const Padding(
padding: EdgeInsets.all(8.0),
child: Text("Email: ", style: TextStyle(fontSize: 20),),
),
const SizedBox(
height: 35,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
TextButton(
onPressed: () {},
child: const Text("CANCEL",
style: TextStyle(
fontSize: 14,
letterSpacing: 2.2,
color: Colors.black)),
),
TextButton(
onPressed: () {
FirebaseDatabase.instance.ref()
.child('useProfileBrowse')
.child(user!.uid)
.update({
'name': displayNameController.text //yes I know.
});
FirebaseDatabase.instance.ref()
.child('useProfileBrowse')
.child(user!.uid)
.update({
'age': ageController.text //yes I know.
});
},
child: const Text(
"SAVE",
style: TextStyle(
fontSize: 14,
letterSpacing: 2.2,
color: Colors.white),
),
)
],
)
],
),
),
),
);
}
}
I am thinking to use a StreamBuilder in my body: with stream: FirebaseDatabase.instance.ref().child('userProfileBrowse').child(user!.uid).onValue,
Any idea how can I display User profile Imageurl, name, and age from my real-time Database
And also edit the information using stream builder or any other method
I have just coded the UI for my profile edit page. I just want someone to help me retrieve data from my data model class and display it on my user edit page. A single line to display just a name from my data model will help a lot to understand how retrieving data works. I have already saved data(imageUrl, name, age) into my data models during the signup process. Just want to display it
full example with StreamProvider :
import 'dart:collection';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
class Person {
Person({required this.name, required this.initialAge});
final String name;
final int initialAge;
Stream<String> get age async* {
var i = initialAge;
while (i < 85) {
await Future.delayed(const Duration(seconds: 1), () {
i++;
});
yield i.toString();
}
}
}
void main() {
runApp(
StreamProvider<String>(
create: (_) => Person(name: 'Yohan', initialAge: 25).age,
initialData: 25.toString(),
catchError: (_, error) => error.toString(),
child: const MyApp(),
),
);
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return const MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
const MyHomePage({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("Future Provider"),
),
body: Padding(
padding: const EdgeInsets.all(8.0),
child: Center(
child: Consumer<String>(
builder: (context, String age, child) {
return Column(
children: <Widget>[
const Text("Watch Yohan Age..."),
const Text("name: Yohan"),
Text("age: $age"),
],
);
},
),
),
),
);
}
}
You already started to use the Provider as a state management, so I'd recommend using StreamProvider like this:
StreamProvider<String>(
create: (_) => Profile(name: 'Yohan', initialImageURL: ''),
initialData: ''.toString(),
catchError: (_, error) => error.toString(),
child: child(),
builder: (context) {
// Pretend this is loading data and reporting the percent loaded.
},
),
)
or you can just notify the UI every time you have got a change from the firebase using ChangeNotifier,
for examples, visit Docs
I've created a flutter project that show a staggeredgridview of images from firestore database. Once i click on one of the images it shows that image. What i want is a download button thats saves the image to my device. Ath the moment I've just used pop.
I've read some about the path provider package but i can't figure out how to implement this in the code. Perhaps there is a better solution?
StaggeredGridView Page
import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
import 'package:proj/screens/home/instafull.dart';
import 'dart:async';
import 'package:proj/services/auth.dart';
import 'package:proj/shared/constants.dart';
class Instapage extends StatefulWidget {
#override
_InstapageState createState() => _InstapageState();
}
class _InstapageState extends State<Instapage> {
final AuthService _auth = AuthService();
StreamSubscription<QuerySnapshot> subscription;
List<DocumentSnapshot> wallpaperlist;
final CollectionReference collectionReference = FirebaseFirestore.instance.collection('mediapost');
#override
void initState() {
// TODO: implement initState
super.initState();
subscription = collectionReference.snapshots().listen((datasnapshot) {
setState(() {
wallpaperlist = datasnapshot.docs;
});
});
}
#override
void dispose() {
subscription?.cancel();
// TODO: implement dispose
super.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: bas,
body: wallpaperlist != null?
StaggeredGridView.countBuilder(
padding: const EdgeInsets.fromLTRB(10, 8, 10, 0),
crossAxisCount: 4,
itemCount: wallpaperlist.length,
itemBuilder: (context, index){
String imgPath = wallpaperlist[index].get('img');
return new Material(
elevation: 8,
borderRadius: BorderRadius.all(Radius.circular(8.0)),
child: InkWell(
onTap: () => Navigator.push(
context,
MaterialPageRoute(
builder: (context) => InstaFull(imgPath: imgPath))),
child: Hero(
tag: imgPath,
child: FadeInImage(
image: NetworkImage(imgPath),
fit: BoxFit.cover,
placeholder: AssetImage('assets/wally2.jpg'),
),
),
),
);
},
staggeredTileBuilder: (index) => StaggeredTile.count(2, index.isEven?2:3),
mainAxisSpacing: 8,
crossAxisSpacing: 8,
): Center(
child: CircularProgressIndicator(),
),
);
}
}
Picture Page
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
class InstaFull extends StatelessWidget {
String imgPath;
InstaFull({this.imgPath});
final LinearGradient backgroundGradient = LinearGradient(
colors: [Color(0x10000000), Color(0x30000000)],
begin: Alignment.topLeft,end: Alignment.bottomRight);
#override
Widget build(BuildContext context) {
return Scaffold(
body: SizedBox.expand(
child: Stack(
children: [
Align(
alignment: Alignment.center,
child: Hero(
tag: imgPath,
child: Image.network(imgPath),
),
),
Align(
alignment: Alignment.topCenter,
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
AppBar(
elevation: 0,
backgroundColor: Colors.transparent,
leading: IconButton(
icon: Icon(Icons.close,
color: Colors.black,
),
onPressed: () => Navigator.of(context).pop(),
),
),
],
),
),
Align(
alignment: Alignment.bottomCenter,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
TextButton(
onPressed: () => Navigator.of(context).pop(),
child: Text('Download')),
],),
)
],
),
),
);
}
}
You can use gallery_saver
Install it and enable this permissions:
iOS
Add the following keys to your Info.plist file, located in <project root>/ios/Runner/Info.plist:
NSPhotoLibraryUsageDescription - describe why your app needs permission for the photo library. This is called Privacy - Photo Library Usage Description in the visual editor.
Android
Android
android.permission.WRITE_EXTERNAL_STORAGE - Permission for usage of external storage
Official example of gallery_saver:
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:gallery_saver/gallery_saver.dart';
import 'package:image_picker/image_picker.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
String firstButtonText = 'Take photo';
String secondButtonText = 'Record video';
double textSize = 20;
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Container(
color: Colors.white,
child: Column(
children: <Widget>[
Flexible(
flex: 1,
child: Container(
child: SizedBox.expand(
child: RaisedButton(
color: Colors.blue,
onPressed: _takePhoto,
child: Text(firstButtonText,
style:
TextStyle(fontSize: textSize, color: Colors.white)),
),
),
),
),
Flexible(
child: Container(
child: SizedBox.expand(
child: RaisedButton(
color: Colors.white,
onPressed: _recordVideo,
child: Text(secondButtonText,
style: TextStyle(
fontSize: textSize, color: Colors.blueGrey)),
),
)),
flex: 1,
)
],
),
),
));
}
void _takePhoto() async {
ImagePicker.pickImage(source: ImageSource.camera)
.then((File recordedImage) {
if (recordedImage != null && recordedImage.path != null) {
setState(() {
firstButtonText = 'saving in progress...';
});
GallerySaver.saveImage(recordedImage.path).then((String path) {
setState(() {
firstButtonText = 'image saved!';
});
});
}
});
}
void _recordVideo() async {
ImagePicker.pickVideo(source: ImageSource.camera)
.then((File recordedVideo) {
if (recordedVideo != null && recordedVideo.path != null) {
setState(() {
secondButtonText = 'saving in progress...';
});
GallerySaver.saveVideo(recordedVideo.path).then((String path) {
setState(() {
secondButtonText = 'video saved!';
});
});
}
});
}
void _saveNetworkVideo() async {
String path =
'https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4';
GallerySaver.saveVideo(path).then((bool success) {
setState(() {
print('Video is saved');
});
});
}
void _saveNetworkImage() async {
String path =
'https://image.shutterstock.com/image-photo/montreal-canada-july-11-2019-600w-1450023539.jpg';
GallerySaver.saveImage(path).then((bool success) {
setState(() {
print('Image is saved');
});
});
}
}
I am trying to create a simple app that adds posts to a firebase realtime database and shows them on a listview in flutter, but when I "post" it to the database, on the firebase console, the data value constantly appears as null. does anyone know what is wrong?
Here is a bit of my code -
post.dart
class Post {
Image coverImg;
File audioFile;
String body;
String author;
Set usersLiked = {};
DatabaseReference _id;
Post(this.body, this.author);
void likePost(User user) {
if (this.usersLiked.contains(user.uid)) {
this.usersLiked.remove(user.uid);
} else {
this.usersLiked.add(user.uid);
}
}
void update() {
updatePost(this, this._id);
}
void setId(DatabaseReference id) {
this._id = id;
}
Map<String, dynamic> toJson() {
return {
'body': this.body,
'author': this.author,
'usersLiked': this.usersLiked.toList()
};
}
}
Post createPost(record) {
Map<String, dynamic> attributes = {
'author': '',
'usersLiked': [],
'body': ''
};
record.forEach((key, value) => {attributes[key] = value});
Post post = new Post(attributes['body'], attributes['author']);
post.usersLiked = new Set.from(attributes['usersLiked']);
return post;
}
class PostList extends StatefulWidget {
final List<Post> listItems;
final User user;
PostList(this.listItems, this.user);
#override
_PostListState createState() => _PostListState();
}
class _PostListState extends State<PostList> {
void like(Function callBack) {
this.setState(() {
callBack();
});
}
#override
void initState() {
super.initState();
}
#override
void dispose() {
super.dispose();
}
#override
Widget build(BuildContext context) {
return ListView.builder(
itemCount: this.widget.listItems.length,
itemBuilder: (context, index) {
var post = this.widget.listItems[index];
return Card(
elevation: 7.0,
color: Colors.white,
child: Column(
children: [
Row(
children: [
IconButton(
icon: Icon(
Icons.play_circle_outline,
color: Colors.black,
size: 30,
),
onPressed: () {},
),
Expanded(
child: ListTile(
title: Text(post.body,
style: TextStyle(
fontWeight: FontWeight.w600,
color: Colors.black)),
subtitle: Text(post.author,
style: TextStyle(color: Colors.black)),
),
),
Expanded(
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
Text(post.usersLiked.length.toString(),
style: TextStyle(
color: Colors.black,
fontWeight: FontWeight.w600)),
IconButton(
icon: Icon(
Icons.thumb_up,
color: post.usersLiked.contains(widget.user.uid)
? Colors.blue
: Colors.black,
),
onPressed: () =>
this.like(() => post.likePost(widget.user)),
)
],
))
],
)
],
));
},
);
}
}
database.dart
final databaseReference = FirebaseDatabase.instance.reference();
DatabaseReference savePost(Post post) {
var id = databaseReference.child('posts/').push();
id.set(post.toJson());
return id;
}
void updatePost(Post post, DatabaseReference id) {
id.update(post.toJson());
}
Future<List<Post>> getAllPosts() async {
DataSnapshot dataSnapshot = await databaseReference.child('posts/').once();
List<Post> posts = [];
if (dataSnapshot.value != null) {
dataSnapshot.value.forEach((key, value) {
Post post = createPost(value);
post.setId(databaseReference.child('posts/' + key));
posts.add(post);
});
}
return posts;
}
home.dart
class UserInfoScreen extends StatefulWidget {
const UserInfoScreen({Key key, User user})
: _user = user,
super(key: key);
final User _user;
#override
_UserInfoScreenState createState() => _UserInfoScreenState();
}
class _UserInfoScreenState extends State<UserInfoScreen> {
User _user;
bool _isSigningOut = false;
List<Post> posts = [];
void newPost(String text) {
var post = new Post(text, widget._user.displayName);
post.setId(savePost(post));
this.setState(() {
posts.add(post);
});
}
void updatePosts() {
getAllPosts().then((posts) => {
this.setState(() {
this.posts = posts;
})
});
}
Route _routeToSignInScreen() {
return PageRouteBuilder(
pageBuilder: (context, animation, secondaryAnimation) => SignInScreen(),
transitionsBuilder: (context, animation, secondaryAnimation, child) {
var begin = Offset(-1.0, 0.0);
var end = Offset.zero;
var curve = Curves.ease;
var tween =
Tween(begin: begin, end: end).chain(CurveTween(curve: curve));
return SlideTransition(
position: animation.drive(tween),
child: child,
);
},
);
}
#override
void initState() {
_user = widget._user;
// HOME PAGE
pageList.add(Scaffold(
backgroundColor: Colors.white,
body: Column(children: [
Expanded(
child: PostList(this.posts, _user),
),
]),
));
pageList.add(Test1());
pageList.add(Scaffold(
backgroundColor: Colors.white,
body: Column(
children: [
TextInputWidget(this.newPost, "Title:"),
],
),
));
pageList.add(Test3());
// ACCOUNT PAGE
pageList.add(
Scaffold(
backgroundColor: Colors.white,
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Row(),
_user.photoURL != null
? ClipOval(
child: Material(
color: Colors.grey.withOpacity(0.3),
child: Image.network(
_user.photoURL,
fit: BoxFit.fitHeight,
),
),
)
: ClipOval(
child: Material(
color: Colors.grey.withOpacity(0.3),
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Icon(
Icons.person,
size: 60,
color: Colors.black,
),
),
),
),
SizedBox(height: 16.0),
Text(
'${_user.displayName}',
style: TextStyle(
color: Colors.black,
fontSize: 26,
fontWeight: FontWeight.w700),
),
SizedBox(height: 8.0),
Text(
' ${_user.email} ',
style: TextStyle(
color: Colors.black,
fontSize: 20,
letterSpacing: 0.5,
),
),
SizedBox(height: 60.0),
_isSigningOut
? CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(Colors.white),
)
: ElevatedButton(
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(
Colors.redAccent,
),
shape: MaterialStateProperty.all(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
),
),
onPressed: () async {
setState(() {
_isSigningOut = true;
});
await Authentication.signOut(context: context);
setState(() {
_isSigningOut = false;
});
Navigator.of(context)
.pushReplacement(_routeToSignInScreen());
},
child: Padding(
padding: EdgeInsets.only(top: 8.0, bottom: 8.0),
child: Text(
'Logout',
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.w500,
color: Colors.white,
),
),
),
),
],
),
),
);
super.initState();
updatePosts();
}
#override
List<Widget> pageList = List<Widget>();
int _currentIndex = 0;
void onTabTapped(int index) {
setState(() {
_currentIndex = index;
});
}
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
elevation: 0.0,
backgroundColor: Colors.white,
title: Text(
'SoundFX',
style: TextStyle(color: Colors.black),
),
centerTitle: true,
),
body: IndexedStack(
index: _currentIndex,
children: pageList,
),
bottomNavigationBar: BottomNavigationBar(
unselectedItemColor: Colors.grey,
selectedItemColor: Colors.blue,
backgroundColor: Colors.white,
elevation: 19.0,
onTap: onTabTapped,
currentIndex: _currentIndex,
type: BottomNavigationBarType.fixed,
items: [
BottomNavigationBarItem(
icon: new Icon(Icons.home),
title: Container(
height: 1.0,
)),
BottomNavigationBarItem(
icon: new Icon(Icons.search),
title: Container(
height: 1.0,
)),
BottomNavigationBarItem(
icon: new Icon(
Icons.add_circle,
size: 40,
),
title: Container(
height: 1.0,
)),
BottomNavigationBarItem(
icon: new Icon(Icons.videocam),
title: Container(
height: 1.0,
)),
BottomNavigationBarItem(
icon: Icon(Icons.account_circle),
title: Container(
height: 1.0,
)),
],
),
);
}
}
class Test1 extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
color: Colors.green,
);
}
}
class Test2 extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
color: Colors.blue,
);
}
}
class Test3 extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
color: Colors.yellow,
);
}
}
text-input.dart
class TextInputWidget extends StatefulWidget {
final Function(String) callback;
String label;
TextInputWidget(this.callback, this.label);
#override
_TextInputWidgetState createState() => _TextInputWidgetState();
}
class _TextInputWidgetState extends State<TextInputWidget> {
final controller = TextEditingController();
#override
void dispose() {
super.dispose();
controller.dispose();
}
void click() {
widget.callback(controller.text);
FocusScope.of(context).unfocus();
controller.clear();
}
void pickFiles() async {
FilePickerResult result =
await FilePicker.platform.pickFiles(type: FileType.any);
File file = File(result.files.first.path);
print(file);
}
#override
Widget build(BuildContext context) {
return Container(
height: 400,
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Expanded(
child: Container(
padding: EdgeInsets.all(20.0),
child: TextField(
controller: this.controller,
decoration: InputDecoration(
labelText: this.widget.label,
))),
),
Container(
child: ElevatedButton(onPressed: this.click, child: Text('Post')),
),
Container(
child:
ElevatedButton(onPressed: this.pickFiles, child: Text('test')),
)
],
),
);
}
}
PS: Also, note that some of the functions and classes are unused or basically useless, and some of the names are very stupid, but please do not comment on those if they are not related to the question, as those are just for some tests for features for me to add into the application.
Also, note that i followed this tutorial - https://www.youtube.com/playlist?list=PLzMcBGfZo4-knQWGK2IC49Q_5AnQrFpzv
firebaser here
Most likely the Firebase SDK is unable to read the URL of the database from its config file, because your database is hosted outside of the default (US) region.
If that is indeed the cause, you should specify the database URL in your code. By specifying it in your code, the SDK should able to connect to the database instance no matter what region it is hosted in.
This mean you should get your database with
FirebaseDatabase("your database URL").reference()
// Or
FirebaseDatabase(databaseURL: "your database URL").reference()
instead of
FirebaseDatabase.instance.reference()
This is documented here:
To get a reference to a database other than a us-central1 default dstabase, you must pass the database URL to getInstance() (or Kotlin+KTX database()) . For a us-central1 default database, you can call getInstance() (or database) without arguments.
So while this is documented, it is incredibly easy to overlook. I'm checking with our team if there's something we can do to make this configuration problem more obvious.
In my flutter project, I want to read data from the Firebase Database of the current user logged in and display the User name from the database and display at the appbar[Line 43:title: Text('$userName'),] of the Page.I had tried by the following code below but it gives error on line 26[Line:final FirebaseUser user = _auth.currentUser();]. The error is on the keyword '_auth.currentUser()'
Error is:A value of type 'Future' can't be assigned to a variable of type 'FirebaseUser'
Here is the code:
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_database/firebase_database.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:udharibook/Screens/UserProfile.dart';
import 'package:udharibook/services/authservice.dart';
import 'Customer_Support.dart';
import 'package:udharibook/services/UserData.dart';
class DashboardPage extends StatefulWidget {
#override
_DashboardPageState createState() => _DashboardPageState();
}
class _DashboardPageState extends State<DashboardPage> {
List<UserData> userdata = [];
String userName;
#override
void initState()
{
super.initState();
FirebaseAuth _auth = FirebaseAuth.instance;
DatabaseReference DBRef = FirebaseDatabase.instance.reference().child('Users');
final FirebaseUser user = _auth.currentUser();
DBRef.child(user.uid).once().then((DataSnapshot user)
{
userName = user.value['Name'];
setState(() {
print(userName);
});
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('$userName'),
backgroundColor: Color.fromRGBO(162, 42, 43, 1.0),
actions: <Widget>[
IconButton(
icon: Icon(Icons.search),
onPressed: () {
print("Search Clicked");
}),
IconButton(
icon: Icon(Icons.sort),
onPressed: () {
print("Sort Clicked");
}),
],
),
drawer: Drawer(
child: ListView(
children: <Widget>[
DrawerHeader(
child: Text("mehul jain"),
decoration: BoxDecoration(
color: Color.fromRGBO(162, 42, 43, 1.0),
),
),
CustomMenu(
Icons.person,
'Profile',() => {
Navigator.pop(context),
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => UserProfile()))
}),
CustomMenu(Icons.assessment, 'Reports', () => {}),
CustomMenu(Icons.settings, 'Settings', () => {}),
CustomMenu(
Icons.perm_phone_msg,
'Customer Support',
() => {
Navigator.pop(context),
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => CustSupport()))
}),
CustomMenu(Icons.lock, 'Log Out', () => {AuthService().signOut()}),
],
),
),
);
}
}
class CustomMenu extends StatelessWidget {
IconData icon;
String text;
Function onTap;
CustomMenu(this.icon, this.text, this.onTap);
#override
Widget build(BuildContext context) {
// TODO: implement build
return Padding(
padding: EdgeInsets.fromLTRB(8.0, 0.0, 8.0, 0.0),
child: Container(
decoration: BoxDecoration(
border:
Border(bottom: BorderSide(color: Colors.grey.shade400))),
child: InkWell(
splashColor: Colors.redAccent,
onTap: onTap,
child: Container(
height: 60.0,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Row(
children: <Widget>[
Icon(icon),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
text,
style: TextStyle(
fontSize: 17.0, fontFamily: 'Exo2'),
)),
],
),
Icon(Icons.arrow_right),
],
),
))));
}
}
currentUser() returns a Future<FirebaseUser>, therefore you have to do the following:
_auth.currentUser().then((curUser)
{
DBRef.child(curUser.uid).once().then((DataSnapshot user)
{
userName = user.value['Name'];
setState(() {
print(userName);
});
});
});
https://dart.dev/codelabs/async-await
I'm trying to learn flutter and right now I'm working on buttonclicks.
I have a very easy program below where the integer sum = 5. If the user returns 5 in the textfield and clicks the submit-button my goal is to return a green square below the submit button. If the user prints anything else, the square will be red.
I have actually no idea where to start with this more then I have in my code, so any help that puts me in the right direction is very appreciated. Thank you.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'buttonclicks',
theme: ThemeData(primarySwatch: Colors.deepOrange),
home: FirstClass(),
);
}
}
class FirstClass extends StatefulWidget {
#override
_FirstClassState createState() => _FirstClassState();
}
class _FirstClassState extends State<FirstClass> {
int sum = 5;
String enterAnswer;
void handleCorrect() {
setState(() {
Container(
height: 60.0,
width: 70.0,
decoration: BoxDecoration(color: Colors.green),
child: Text('CORRECT'),
);
});
}
void handleFalse() {
setState(() {
Container(
height: 60.0,
width: 70.0,
decoration: BoxDecoration(color: Colors.red),
child: Text('FALSE'),
);
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('BUTTON-CLICKS'),
),
body: Container(
child: Center(
child: Column(
children: <Widget>[
Container(
width: 50.0,
child: TextField(
textAlign: TextAlign.center,
autofocus: true,
keyboardType: TextInputType.number,
onChanged: (val) {
enterAnswer = val;
},
),
),
RaisedButton(
child: Text('SUBMIT'),
onPressed: () {
if (enterAnswer.isNotEmpty) {
if (enterAnswer == sum) {
handleCorrect(); //setState
} else {
handleFalse(); //setState
}
}
}),
Container(
//handleCorrect or handleFalse
child: Text("RETURN A GREEN OR A RED BOX"),
),
],
),
),
),
);
}
}
How about something like the following. You should call setState when the button gets clicked and set some state to determine which color to show.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'buttonclicks',
theme: ThemeData(primarySwatch: Colors.deepOrange),
home: FirstClass(),
);
}
}
class FirstClass extends StatefulWidget {
#override
_FirstClassState createState() => _FirstClassState();
}
class _FirstClassState extends State<FirstClass> {
int sum = 5;
String enterAnswer;
Color containerColor;
void setColorForAnswer()
{
setState(() {
containerColor = enterAnswer != null && enterAnswer.isNotEmpty
? (int.parse(enterAnswer) == sum
? Colors.green
: Colors.red)
: Colors.transparent;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('BUTTON-CLICKS'),
),
body: Container(
child: Center(
child: Column(
children: <Widget>[
Container(
width: 50.0,
child: TextField(
textAlign: TextAlign.center,
autofocus: true,
keyboardType: TextInputType.number,
onChanged: (val) {
enterAnswer = val;
},
),
),
RaisedButton(
child: Text('SUBMIT'),
onPressed: () {
setColorForAnswer();
}),
Container(
width: 50,
height: 50,
color: containerColor,
),
],
),
),
),
);
}
}