Maybe anyone tried to solve this task ?
Seems, i could get the MIDI messages from tracks of MIDI-file. But how to decode and generate the music notes picture ?
If you are talking about displaying a musical score, then that is a huge task (which is why I haven't done it). One possible solution would be to create an ABC music file from the midi messages and use the ABC for javascript library (https://www.b4x.com/android/forum/threads/display-musical-notation-in-your-apps.42394/) to display it in a webview.