android - How to add a callback to an activity that's created in a fragment? -

i have fragment button calls following method when clicked/pressed:

public void onclick() {    intent intent = new intent(getactivity(), mynewactivity.class);    startactivity(intent) } 

however, want pass callback method mynewactivity called inside activity's ondestroy method. need callback method call fragment's finish() method.

i tried using static variables , worked seems bad design. what's best way this? if not through callback method, what's better approach?

use startactivityforresult() proposed in comments.

use below code:

fragment:

public class myfragment extends fragment {      private static final int request_code = 1353;      @override public view oncreateview(layoutinflater inflater,                                        @nullable viewgroup container,                                        @nullable bundle savedinstancestate) {         view v = inflater.inflate(r.layout.fragment, container, false);         v.findviewbyid(r.id.btn_start).setonclicklistener(new view.onclicklistener() {             @override public void onclick(view v) {                 intent intent = new intent(getactivity(), secondactivity.class);                 startactivityforresult(intent, request_code);             }         });         return v;     }      @override public void onactivityresult(int requestcode, int resultcode, intent data) {         if (requestcode == request_code) {             toast.maketext(getactivity(), "hooray! fragment got result activity!", toast.length_short).show();         }     } } 

second activity:

public class secondactivity extends activity {      @override protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.second_activity);          findviewbyid(r.id.btn_finish).setonclicklistener(new view.onclicklistener() {             @override public void onclick(view v) {                 setresult(activity.result_ok);                 finish();             }         });     } }