How to Add Data to Firestore in Android Using MVP Architecture

Learn how to effectively implement data saving to Firestore in your Android app using the `MVP Architecture`. This guide helps troubleshoot common issues and provides step-by-step solutions.
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How to Add Data to Firestore in Android Using MVP Architecture

Implementing the Model-View-Presenter (MVP) architecture in your Android applications can greatly simplify your code management and improve separation of concerns. However, working with Firestore in this architecture can pose some challenges. This guide addresses a common issue developers face — saving data to Firestore using MVP and provides a clear solution.

The Problem

You may have faced a situation where your Firestore data is not getting saved when using MVP architecture, even though it works in a direct implementation. The code shows an attempt to post data using the MVP pattern, but the addition of data to the Firestore collection fails when triggered by the save button in the Activity.

Here's a simplified example of the relevant code from an Android Activity using MVP:

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Despite the straightforward nature of the API calls to Firestore, the issue arises due to how the presenter and interactor are organized and initialized.

Solution: Structuring Your MVP Components Correctly

The crux of the problem lies in incorrect initialization of the interactor in your MVP structure. To address this, it requires proper instantiation of both the view and the interactor in the presenter class. Here's how you can resolve the issue step-by-step:

Step 1: Update the Presenter Initialization

You need to ensure that your Presenter class has a concrete reference to the Interactor. Here’s how to modify the AddPresenter:

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Step 2: Ensure Your Interactor is Configured Correctly

Ensure that your AddInteractor is structured properly to handle data communication with Firestore. Here’s the current version that is set to work with the updated presenter:

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

Conclusion

Now your presenter is correctly initialized to recognize its interactor, which allows data to be saved to Firestore without issues. When implementing MVP Architecture in Android applications, ensure that all components are properly linked to ensure the smooth passage of data between the view, presenter, and model.

By following the above steps, you can effectively utilize the MVP Architecture pattern while working with Firestore in your Android application. Happy coding!

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