How to build a mp3 player app with app inventor 2

[Ernie]

Hi, everyone. Thanks for helping.

I am trying to build a simple mp3 player app that can list out all the file with .mp3 extension in the app and include the basic functions such as play, pause, next and previous. But 1st of all, how do I get the app to search for .mp3 file in the SD and display it in the app. I am using app inventor 2. Is this possible? I looked over the search result, all talked about choosing a particular file but I wanted to be able to list out all the .mp3 file so that other people who got the app installed, can play the songs in their phones.

[TimAI2]

See the Jukebox example app using Taifun's file extension for some ideas