What is the problem with this flutter code. Im trying to read the data from firebase-CodePudding

Future<Object?> GetData() async {
  FirebaseDatabase database = FirebaseDatabase.instance;

  DatabaseReference ref = FirebaseDatabase.instance.ref("litre");

// Get the data once
  DatabaseEvent event = await ref.once();

// Print the data of the snapshot
  print(event.snapshot.value);
  return event.snapshot.value;
}

Code is here I want to get the value of "litre" tag and then print it into Text() function. Firebase json is here =>

{
    "litre": "16"
}

And I expected to see "16" but I facing Instance of 'Future'

CodePudding user response：

GetData is an async function, so using it in a Text() widget will throw an exception because it is not string.

You can use FutureBuilder to build the Text() widget.

Example:

Otherwidgets,
FutureBuilder(
          future: GetData(),
          builder: (context, snapshot) => Text(snapshot.data.toString()),
        ),