Mp3 - openWithDefaultApplication (Android / iOS)

Good day!

My Air application for Android and iOS, can download and save MP3 files into cacheDirectory.

Then on desktop, using "openWithDefaultApplication‌" I can easily play those saved MP3s by windows default mp3 player.

However I can not do the same job, to open cached MP3s by default MP3 player on Mobile (Android / iOS).

Any help would be appreciated in this case?

Shall I add any permissions? Shall add something in the manifest? or what.

Thanks a lot.