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Learn how to successfully post raw JSON data to a server using Retrofit in Android, including best practices and common pitfalls to avoid.
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How to Post Data Using Retrofit as Raw JSON in Android

When developing an Android application that requires server interaction, you might find yourself needing to post data in the form of raw JSON. However, configuring Retrofit to achieve this can sometimes lead to confusion, especially when the server does not respond as expected.

In this post, we will discuss a typical scenario where you may encounter challenges while posting raw JSON data using Retrofit and how to effectively resolve them.

The Problem

The user, who wants to login to their application, tries to post login credentials (user ID and password) to the server. After implementing the Retrofit setup, they notice that the application does not receive any response from the server, and the progress bar continues to load indefinitely.

The user's server sends a JSON response indicating whether the login was successful or not, but the user is not able to access it properly. The server's response can look something like this:

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

Potential Mistakes

Incorrect Handling of Response: The user is trying to create a new JSONObject inside the onResponse method to read the response instead of directly using the response.body().

Not Dismissing the Progress Dialog: The progress dialog might not be dismissed if the activity or fragment gets destroyed during the network call.

The Solution

Here’s how to fix the issues mentioned above:

Use the response.body()

Instead of parsing the response using JSONObject, simply access the response.body() directly. This gives you the parsed object of your LoginResponse class, which contains the server's response.

Here’s an updated version of the onResponse method:

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

Dismiss the Progress Dialog

It is crucial to ensure that the progress dialog is dismissed in both the onResponse and onFailure callbacks. This prevents a situation where the dialog remains open indefinitely.

Here’s how your onFailure method should look:

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

Conclusion

By following the adjustments outlined in this post, you can resolve common issues encountered when trying to post raw JSON data using Retrofit in your Android application. Ensure that you always handle both successful and failed responses gracefully and make use of Retrofit’s built-in capabilities to simplify your code. Happy coding!