java - Service + activity for playing music -

i created simple music play want play in background, don't know if solution correct:

• service (for playing music)
• activity fragment (for control)

but when easy play/stop/pause (getcurrentposition , exchange data), there huge problem seekbar runtime.

when can send position via bundle, changing seekbar runtime nothing me.

can tell me solution?

the easiest way declare broadcastreceiver inside service , activity use localbroadcastmanager.getinstance(this).sendbroadcast(intent); send data service. other way bind service activity , data directly. there no conflict between onstartcommand , onbind methods. can start service onstartcommand , bind later.