Скачать или смотреть How to Parse JSON Data in Flutter

Discover how to effectively `parse JSON data` in Flutter, understand the common pitfalls, and learn the proper methods to display the data in your app.
---
This video is based on the question https://stackoverflow.com/q/62533880/ asked by the user 'Mohamed Borhene Hamedi' ( https://stackoverflow.com/u/13739812/ ) and on the answer https://stackoverflow.com/a/62535378/ provided by the user 'Tanuj' ( https://stackoverflow.com/u/5387880/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Flutter how to parse JSON data

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Parse JSON Data in Flutter: A Step-by-Step Guide

Parsing JSON data in Flutter may seem challenging at first, especially if you're new to working with APIs. In this article, we'll carefully explore how to parse JSON data returned from an API and display it in your Flutter application. Let's get started!

Understanding the Problem

Imagine you're developing a Flutter application that retrieves JSON data from an API. You successfully make the HTTP request, but when you try to parse the response, you encounter an error stating:

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

This error arises because the API response is a JSON object, not a list, which causes issues when trying to iterate over it.

The JSON Data Structure

The JSON data structure we're dealing with looks like this:

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

It's important to note that this response contains key-value pairs rather than an array. Therefore, we need to handle it differently than a list.

Steps to Properly Parse the JSON Data

1. Fetching the Data

Start by fetching the data using an HTTP GET request. Here’s your initial method to do that:

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

2. Identifying the Structure

Since the response is a JSON object, we should create a list of the keys we want to access:

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

3. Modifying the Widget to Use Keys

We need to update our widget to accommodate the structure of the JSON object. We should change the ListView.builder to iterate over the keys and access the corresponding values:

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

Here, we're using the keys list to determine which value to display for each ListTile.

Conclusion

By following these steps, you can effectively parse JSON data in Flutter and demonstrate it within your app. Make sure to understand the structure of the JSON response you are dealing with, as it will dictate how you can manipulate and display the data.

If you encounter any issues or have questions, feel free to leave a comment below. Happy coding!