Reduce Image Size in Android |Kotlin

Image compression is a common requirement in Android development — especially if you’re uploading photos to a server, storing them locally, or optimizing your app’s performance. Large images can slow down uploads, increase storage usage, and affect the overall user experience.

Image Resolutions

🔍 Why Do We Need Image Compression?

Modern mobile cameras click images that are 3MB to 10MB+, depending on resolution. Uploading such large files leads to:

• 🚫 Increased network usage
• 🐢 Slower uploads
• 💾 More storage consumption
• 📉 High memory usage on low-end devices

Compressing images before uploading/storing them solves all these issues.

I’ll show you the simplest way to reduce image size in Android using Kotlin, with the help of an open-source GitHub library: 👉 AndroidImageResizer

[embed]GitHub - thevysh/AndroidImageResizer: A simple helper class to help reduce the size of image by… A simple helper class to help reduce the size of image by scaling down the image - thevysh/AndroidImageResizergithub.com

val MAX_SIZE = 1280 * 720 // resolution ratios
val resizedBitmapFile:Bitmap= ImageResizer.reduceBitmapSize(originalBitmapFile, MAX_SIZE)

🎯 Final Thoughts

Image compression is essential in any Android app that handles photos. With the AndroidImageResizer library, you can easily reduce large images with just a few lines of Kotlin code.

Let me know if you want:

• A code snippet for uploading the compressed file
• A comparison of image sizes before/after
• A custom cover image for your Medium blog

Happy coding! 🚀

Photo by Eden Constantino on Unsplash