android - How to play a button sound while playing a background music? -

i want know how play button's sound while background music playing? , also, want know how continuously play background music other activities. please me.

this code of firstactivity.java

public class firstactivity extends activity {         mediaplayer bgsound,menuselect, settingsselect;  bgsound.start();mediaplayer bgsound,menuselect, settingsselect;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      requestwindowfeature(window.feature_no_title);     setcontentview(r.layout.activity_first);      bgsound = mediaplayer.create(firstactivity.this, r.raw.theme);     bgsound.setlooping(true);     bgsound.start();      final imageview btnplay = (imageview) findviewbyid(r.id.imgplay);     final imageview btncredits = (imageview) findviewbyid(r.id.btncredits);     final imageview btnscores = (imageview) findviewbyid(r.id.btnscores);        final imageview btnsettings = (imageview) findviewbyid(r.id.btnsettings);      btnplay.setonclicklistener(new onclicklistener(){     public void onclick(view v) {              bgsound = mediaplayer.create(firstactivity.this, r.raw.menu_select);         menuselect.setlooping(true);         menuselect.start();          animationset set = new animationset(true);         animation animation = new translateanimation(                          animation.relative_to_self,1,                           animation.relative_to_self,1);         animation.setduration(5);         set.addanimation(animation);          btnplay.startanimation(animation);         intent i=new intent(                firstactivity.this,                secondactivity.class);           startactivity(i);     } });