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A step-by-step guide on how to save user input from EditTexts into Google Firestore using Kotlin, with tips for retrieval in another activity.
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This video is based on the question https://stackoverflow.com/q/68605999/ asked by the user 'Abrahim Mahmud' ( https://stackoverflow.com/u/16523991/ ) and on the answer https://stackoverflow.com/a/68609163/ provided by the user 'Alex Mamo' ( https://stackoverflow.com/u/5246885/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Save User Input in Google Firestore Using Kotlin

If you’re developing an Android application and looking to collect user information such as first name, last name, and ID, integrating Google Firestore for data storage is an excellent solution. However, with various guides available online, it can be overwhelming to find a method that works—especially when each approach might differ slightly. In this guide, we’ll walk you through each step to seamlessly save user input into Firestore and retrieve it from another activity.

Understanding the Problem

You want to capture user data (first name, last name, ID) through EditText fields in your app and save this information securely in Google Firestore. While you may have set up your dependencies and connections to Firebase correctly, the implementation details can often be confusing. The goal here is to provide a straightforward approach backed by a working solution.

Steps to Save User Input to Firestore

1. Getting Data from EditText Fields

To collect data input from your user, you can extract the text from the EditText fields using the following Kotlin code:

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Ensure that you replace firstNameEditText, lastNameEditText, and idEditText with the actual IDs of your EditText views.

2. Creating a Data Class

Next, you will need to create a data class that holds the structure for the user data you want to save. This class makes it easier to manage your data and pass it to Firestore.

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3. Creating a User Object

Once you have your data class set up, you can create an instance of the User class using the data you collected:

[[See Video to Reveal this Text or Code Snippet]]

4. Writing Data to Firestore

Now it's time to save the user object to Firestore. The following code snippet demonstrates how to do this:

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This code sends the user data to Firestore under the "users" collection, using the provided ID as the document key.

5. Firestore Database Schema

Following these steps will result in a database schema that looks like this:

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6. Reading Data Back from Firestore

To retrieve the saved information, you will need to perform a get() call on the Firestore document:

[[See Video to Reveal this Text or Code Snippet]]

The successful retrieval will log the user's full name using the provided IDs.

Conclusion

By following the steps outlined in this guide, you should be able to save and retrieve user input from Firestore using Kotlin without any hassle. The key takeaway is to understand the structure of your data, create a corresponding model, and use Firestore's API correctly. Now you can efficiently store user data and retrieve it when needed, enhancing your application's functionality significantly.

Happy coding!