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Learn how to implement a `loading screen` in your Flutter app to improve user experience during data deletion from Firestore.
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This video is based on the question https://stackoverflow.com/q/62576423/ asked by the user 'Himanshu Ranjan' ( https://stackoverflow.com/u/10397208/ ) and on the answer https://stackoverflow.com/a/62576513/ provided by the user 'Kumar Lokesh Rathod' ( https://stackoverflow.com/u/5197656/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Add a Loading Screen While Deleting Data in Flutter

When building applications with Flutter, providing feedback to users during long-running operations like data deletion is crucial for a good user experience. This is especially true when using an await function to delete data from a Firestore database, as the app remains unresponsive until the operation completes. In this guide, we'll explore how to show a loading screen while deleting data, ensuring that users are informed that an operation is in progress.

The Problem

You want to display a loading screen while your application is in the process of deleting data from Firestore. This improvement not only keeps users informed but also enhances the overall aesthetic of your app by preventing it from appearing frozen during operations.

Example Code Snippet

Here's how your current function looks for deleting data:

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You may have noticed that as soon as Navigator.pop(context); executes, the screen pops out, and the user might feel confused or think that the app has become unresponsive.

The Solution

To solve this problem, we can create a class to handle the loading screen. This class will manage displaying and hiding a dialog that indicates background processing is occurring.

Step 1: Create the Loader Dialog Class

First, we need to create a LoaderDialog class which will handle showing and hiding the loading dialog.

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Step 2: Show the Loading Dialog

In the class where you want to invoke the loading dialog, you'll need to declare a GlobalKey to control it:

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To show the loading dialog, you can call it right before starting the data deletion:

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Step 3: Hide the Loading Dialog

After the data deletion process is complete, you can close the loading dialog by popping it from the current context:

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Final Implementation

Here’s how the complete function will look after implementing the loading screen:

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Conclusion

By implementing a loading screen during data deletion processes in your Flutter applications, you help alleviate user concerns about the app freezing or becoming unresponsive. A well-structured loading dialog not only enhances user experience but also provides a professional touch to your application. Try this approach in your next Flutter project to see the improvement firsthand!

Ensuring a smooth user experience is key in app development, and a loading screen is a simple yet effective strategy to achieve that. Happy coding!