Local Notification scheduler time and voice Not working Ionic 4

I have try to use Local Notification On my app.
-Android lower Version it’s working at started time.And app close then not show Notification and not play Mp3 sound.

-Android Higher Version :- It working scheduler time Local Notification but not show icon and sound.

I don’t know what is problem. I use service create Notification and I use set time to play song without run background service.so I found Local Notification but it did’t worked.
Please Help me How to solve my problem any other option I will set time to Play MP3 On kill the app but MP3 play and then play music .