In Android, can a child activity call a method in the parent activity without closing?
<p>I have an Android app which presents a grid of items in my MainActivity. From that view, I have a child activity that shows options for filtering the items in the main activity. I'm able to update the items in the main activity after closing the child activity, but I want the filtering to happen while the child activity is still open.</p>

<p>Is it possible to trigger a parent activity's method without closing the child activity?</p>
