Android: Activity that close your antecessor -

i have 2 activities, "a" , "b", "a" opens "b". when user hits button on activity "b", don´t want see "a", want close "a". on "b" did this:

@override     public void finish() {         // todo auto-generated method stub          intent intent = new intent(this, loginactivity.class).putextra(tag, tag).setflags(intent.flag_activity_clear_top);                                                       startactivity(intent);         //super.finish();     } 

and in activity "a", did this:

@override     protected void oncreate(bundle savedinstancestate) {          super.oncreate(savedinstancestate);                    if(getintent().getextras() != null)              if(getintent().getstringextra(homeactivity.tag) != "")                  finish();                    } 

it works perfectly, i´m getting exception:

e/activitythread(11115): activity br.com.pedmobiledroid.view.controller.loginactivity has leaked intentreceiver com.android.internal.policy.impl.multiwindow.multiphonewindowevent$1@42045be0 registered here. missing call unregisterreceiver()? 

someone know better way properly?

just call finish() on activitya after starting activityb:

intent intent = new intent(activitya.this, activityb.class); startactivity(intent); finish();