Flutter: accessing data in Firebase Realtime Database

Question

I have the following Firebase realtime database connected to my flutter project:

I am fairly new to flutter and firebase, I understand that a way to access the data in this database in my flutter project is by using a database reference variable. So i have the following reference variable itemRef:

class _MyHomePageState extends State<MyHomePage> {
  DatabaseReference itemRef;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    itemRef = FirebaseDatabase.instance.reference();
  }

Now, how do i access the temperature and pulse values in the database using this itemRef?

Peter Haddad · Accepted Answer · 2020-04-29 08:24:14Z

1

Try the following:

itemRef = FirebaseDatabase.instance.reference();
itemRef.once().then((DataSnapshot snapshot){
  print(snapshot.value);
  var pulse = snapshot.value["pulse"];
  var temp  = snapshot.value["temperature"];
});

use the once() method to retrieve the data, then snapshot.value will be of type Map<String,dynamic> and you can access the attributes using the get operator.

answered Apr 29, 2020 at 8:24

Peter Haddad

81.2k26 gold badges148 silver badges149 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Flutter: accessing data in Firebase Realtime Database

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related