Скачать или смотреть How to Convert .txt Asset to ArrayList String Format in Kotlin

Learn how to transform your `.txt` coordinate assets into an `ArrayList String ` in Kotlin! This guide provides a step-by-step breakdown for Android developers.
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This video is based on the question https://stackoverflow.com/q/77288135/ asked by the user 'Tommy' ( https://stackoverflow.com/u/19964439/ ) and on the answer https://stackoverflow.com/a/77288419/ provided by the user 'Amardurai' ( https://stackoverflow.com/u/10258130/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Transforming .txt Assets into ArrayList<String> in Kotlin

If you're dealing with thousands of coordinates that need to be plotted in your Android application, you might have saved them in a .txt file in the assets folder. However, when you read this file, it comes back as a single string. What you need is to convert this string into an ArrayList<String> format. In this guide, I'll walk you through how you can achieve this step by step.

The Problem

When you attempt to read your .txt asset file, the Kotlin code will give you all the data as a single string, despite the format being structured as coordinates in an array-like manner. For example, your data might look something like this:

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

Your goal is to convert the data into a more manageable format, such as an ArrayList of strings that maintain the original structure—with each coordinate neatly in quotes and separated correctly.

Solution Overview

To accomplish this, you'll need to perform the following steps:

Create a Data Model

Implement a Function to Read the Coordinates

Structure Your Text File Correctly

Call Your Function and Retrieve the Data

Let’s explore each step in more detail.

1. Create a Data Model

First, define a data class that can represent your coordinates. This is the foundation for organizing your data.

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

2. Implement a Function to Read the Coordinates

Next, create a function that will read your asset file and convert it into an ArrayList<String>. Here's how it works:

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

This function utilizes Gson, which helps parse the string data into an array format that we can work with.

3. Structure Your Text File Correctly

Your text file should follow a specific format that allows Gson to parse it successfully. Ensure your coordinate.txt file looks like this:

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

4. Call Your Function

Finally, when you want to retrieve the data, simply call your function as follows:

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

This line will result in an ArrayList<String> that holds all your coordinates, ready for processing and plotting.

Conclusion

By following these steps, you can easily read a .txt asset as an ArrayList<String> in Kotlin. This approach will help you manage your coordinates more effectively, supporting your data visualization needs in Android app development. Happy coding!