Flutter get logged user data to other screen view - dart

Question

I have API.dart like this to authenticating a user, log in and log out
class Api {
static FirebaseAuth _auth = FirebaseAuth.instance;
static GoogleSignIn _googleSignIn = GoogleSignIn();
FirebaseUser firebaseUser;
Api(FirebaseUser user) {
this.firebaseUser = user;
}
static Future<FBApi> signInWithGoogle() async {
final GoogleSignInAccount googleUser = await _googleSignIn.signIn();
final GoogleSignInAuthentication googleAuth = await googleUser.authentication;
final FirebaseUser user = await _auth.signInWithGoogle(
accessToken: googleAuth.accessToken,
idToken: googleAuth.idToken,
);
assert(user.email != null);
assert(user.displayName != null);
assert(await user.getIdToken() != null);
final FirebaseUser currentUser = await _auth.currentUser();
assert(user.uid == currentUser.uid);
// print('photoURL api ' + user.photoUrl);
return Api(user);
}
static Future<void> signOut() async {
await _auth.signOut().then((_) {
print("***** log out...what the hell?");
_googleSignIn.signOut();
});
}
}
I've have a cloud function to create new user to database cloud firestore.
And in view account settings, I want to update user information like displayName, photoUrl into firestore. How I get current user in my account setting view.
class Settings extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text(
'ACCOUNT',
style: TextStyle(color: primaryColor, fontWeight: FontWeight.bold),
),
centerTitle: true,
),
body: new SettingsScreen(),
);
}
}
class SettingsScreen extends StatefulWidget {
#override
State createState() => new SettingsScreenState();
}
class SettingsScreenState extends State<SettingsScreen> {
TextEditingController controllerNickname;
SharedPreferences prefs;
String id;
String nickName;
String photoUrl;
bool isLoading = false;
File avatarImageFile;
final FocusNode focusNodeNickname = new FocusNode();
#override
void initState() {
super.initState();
readLocal();
}
void readLocal() async {
prefs = await SharedPreferences.getInstance();
id = prefs.getString('id') ?? '';
nickName = prefs.getString('nickName') ?? '';
photoUrl = prefs.getString('photoUrl') ?? '';
controllerNickname = new TextEditingController(text: nickName);
// Force refresh input
setState(() {});
}
Future getImage() async {
File image = await ImagePicker.pickImage(source: ImageSource.gallery);
if (image != null) {
setState(() {
avatarImageFile = image;
isLoading = true;
});
}
uploadFile();
}
Future uploadFile() async {
String fileName = id;
StorageReference reference = FirebaseStorage.instance.ref().child(fileName);
StorageUploadTask uploadTask = reference.putFile(avatarImageFile);
StorageTaskSnapshot storageTaskSnapshot;
uploadTask.onComplete.then((value) {
if (value.error == null) {
storageTaskSnapshot = value;
storageTaskSnapshot.ref.getDownloadURL().then((downloadUrl) {
photoUrl = downloadUrl;
Firestore.instance
.collection('users')
.document(id)
.updateData({'displayName': nickName, 'photoUrl': photoUrl}).then((data) async {
await prefs.setString('photoUrl', photoUrl);
setState(() {
isLoading = false;
});
Fluttertoast.showToast(msg: "Upload success");
}).catchError((err) {
setState(() {
isLoading = false;
});
Fluttertoast.showToast(msg: err.toString());
});
}, onError: (err) {
setState(() {
isLoading = false;
});
Fluttertoast.showToast(msg: 'This file is not an image');
});
} else {
setState(() {
isLoading = false;
});
Fluttertoast.showToast(msg: 'This file is not an image');
}
}, onError: (err) {
setState(() {
isLoading = false;
});
Fluttertoast.showToast(msg: err.toString());
});
}
void handleUpdateData() {
focusNodeNickname.unfocus();
setState(() {
isLoading = true;
});
Firestore.instance
.collection('users')
.document(id)
.updateData({'displayName': nickName, 'photoUrl': photoUrl}).then((data) async {
await prefs.setString('nickname', nickName);
await prefs.setString('photoUrl', photoUrl);
setState(() {
isLoading = false;
});
Fluttertoast.showToast(msg: "Update success");
}).catchError((err) {
setState(() {
isLoading = false;
});
Fluttertoast.showToast(msg: err.toString());
});
}
#override
Widget build(BuildContext context) {
...

Answer 1

You can do something like this FirebaseAuth.instance.currentUser()
This returns the current user if any. Otherwise it returns null