The process of invoking a Cloud Function in Firebase through Flutter involves the following steps:
Set up your Flutter project and integrate Firebase into your app.
Create a Cloud Function in Firebase Console or deploy it using Firebase CLI.
Write a function in Flutter to call the Cloud Function. You can use the FirebaseFunctions
class from the firebase_functions
package and initialize it using FirebaseFunctions.instance
, which returns a singleton instance. Then, you can call the Cloud Function using the httpsCallable
method of the FirebaseFunctions
class.
Pass the necessary parameters to the Cloud Function using a Map
object.
Handle the response of the Cloud Function in your Flutter code.
Here is an example of how you can call a Cloud Function named addNumbers
in Flutter:
import 'package:firebase_functions/firebase_functions.dart';
final functions = FirebaseFunctions.instance;
Future<int> addNumbers(int a, int b) async {
final httpsCallable = functions.httpsCallable('addNumbers');
final result = await httpsCallable.call({
'a': a,
'b': b,
});
return result.data;
}
This function takes two integers a
and b
as parameters, calls the Cloud Function addNumbers
with these parameters, and returns the result of the Cloud Function as an integer. You can use this function in your Flutter code like this:
int result = await addNumbers(3, 4);
print(result); // prints 7
Note that you need to handle errors that may occur while calling the Cloud Function. The call
method of the FirebaseFunctions.HttpsCallable
class returns a HttpsCallableResult
object that has a data
property containing the result of the Cloud Function. However, the call
method may throw an exception if the Cloud Function fails to execute. You can handle these exceptions using a try-catch
block.
Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss
Asked: 2023-01-10 11:00:00 +0000
Seen: 9 times
Last updated: Feb 23 '22
In a new Flutter project on Android Studio, is it possible to not have any libs or main.dart file?
How can Google calendar events be generated on the server-side using Flutter?
How can I retrieve an SVG image from a URL in Flutter?
How can I combine streams of different types in Dartlang using rxdart?
What are the steps to disable FlutterFire configuration?
How can zooming similar to desktop be achieved in HTML webview browser using Flutter?