Flutter Flow: Write to Google Sheets Custom Action

There are amazing integrations to send data to backend services like Firebase, Supabase, and any API. In this article I want to show you how to write to Google Sheets using a custom action.

Setup

We are going to use the package gsheets for this example. You can get the latest version here:

gsheets install | Dart package

The package mentions following this article for the Google Sheets API access:

How To Get Credentials for Google Sheets

There is one minor change when getting the key. It ask you to create it before creating the service account. After creating the service account, it will take you to the credentials page again. Click on the service account and go to the Keys tab. You can create your key in JSON format there.

Creating your custom action

In Flutter Flow, go to the Custom Code tab and click Add > Action