There’s no criteria on this but I guess I would go for the easier approach. After posting this, I managed to retrieve the image URL link and show it in Mendix as shown in this link: https://www.geeksforgeeks.org/how-to-retrieve-image-from-firebase-in-realtime-in-android/. ( Copying and pasting the image URL link in realtime database in firebase side, while on Mendix side I created an action button→ open link and I selected the attribute from my dataview.
However, I feel that this is not so efficient since it only shows 1 image and I have to copy and paste the image URL everytime when I want to show the image in Mendix but I am not sure how to solve this problem besides this. I would like to retrieve the image directly from Firebase Storage, if it is possible. I think either clicking a button in Mendix to retrieve the image/ or maybe the latest 3-5 images is fine too. I have read from some of the Mendix forum that they decode the base64 image or smth like that but I have no idea why did they do that and how to use to solve the problem.
I really hope that you are able to help me on this please as I am struggling with this a lot… I am the only one who is doing Mendix in my school internship project… I apologize for the inconvenience caused.