Dart language asynchronous ??

import 'dart:async';

void main() {
  final myFuture = Future(() {
    print("Hello from the future!");
    return true;
  });

  print("Done!");
}

Source: rahmanfadhil.com

Future as a parameter with async in flutter

FloatingActionButton(
  onPressed: () => getImageFromCam(index),
  tooltip: 'Pick Image',
  child: Icon(Icons.add_a_photo),
);

...

Future<void> getImageFromCam(int index) async {
  // Do whatever you want with `index`.
  final image = await ImagePicker.pickImage(source: ImageSource.camera);
  setState(() => _image = image);
}

Source: stackoverflow.com

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