How to Easily Convert a Base64 String to a PDF on Android using Kotlin

Learn how to convert a `Base64` string into a PDF file in your Android applications using Kotlin. This guide includes code examples and setup instructions for smooth functionality.
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How to Easily Convert a Base64 String to a PDF on Android using Kotlin

In today's digital age, many applications handle data transfer in a variety of formats, one of which is Base64. This encoding is commonly used to send binary data over media designed to deal with text. If you're developing an Android application and looking to convert a Base64 string into a PDF file, you've come to the right place. In this guide, we will address the issue step-by-step, providing you with all the code snippets and details you need to seamlessly integrate this functionality into your Android app.

Understanding the Problem

You may find yourself in a situation where you receive a Base64 string and need to create a PDF file from it. The challenge lies in the correct decoding of the string, saving it as a file, and subsequently opening that file with a PDF reader. Let’s break down the entire process.

Step-by-Step Solution

Part 1: Decoding the Base64 String and Saving as PDF

You have already written some initial code to decode the Base64 string and write it to a file. Here’s an improved version of that code:

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This function takes a DtoSymptomPdf object and uses its properties to create a PDF file at the specified location.

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

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This enables your app to share PDF files securely with other applications.

Part 4: Generating and Opening the PDF

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Explanation of the Code

Generate PDF: The generatePDFFromBase64 function decodes the Base64 data and writes it into a file.

Open PDF: The openDownloadedPDF function checks if the file exists and creates an Intent to open it with a PDF reader.

File Path: The getFilePath function ensures the directory for the PDF exists before returning the full path.

Conclusion

By following the above steps, you can effortlessly convert Base64 strings into PDF files on Android using Kotlin. Make sure to configure everything correctly, and you'll have a functional PDF handling feature in your application. If you have any further questions or need more assistance, feel free to ask in the comments below!