java - Notify a Fragment of onPostExecute from MainActivity -

java - Notify a Fragment of onPostExecute from MainActivity -

in android, i'm having problem figuring out how, when asynctask complete, notify fragment listening. seems usual java stuff, propertychangelistener not available. in onpostexecute, want fire event , have otherfragment see that.

how do this?

public class mainactivity extends fragmentactivity { <stuff> private class consumewebservice extends asynctask <string, // type of parameters sent task upon execution - doinbackground() integer, // type of progress units published during background computation -onprogressupdate() string> { public consumewebservice(somekindoflistener listener){ this.mylistener = listener; } protected string doinbackground(string... urls) { < json info restful service> < create , populate sqlite db wit json data> homecoming jsondata; } @override protected void onpostexecute(string result) { seek { <fire kind of event> } grab (exception e) { } } } } public class otherfragment extends fragment implements somekindoflistener { @override public void somekindofchange(somekindofchangeevent arg0) { < stuff want do> } } public interface somekindoflistener { void onpostexecutedone(); }

i this:

1 - have interface

public interface onxlistener { void onx(object data); }

2- have fragment implement it

public class myfragment extends fragment implements onxlistener{ public void onx(object data) { dosomething(data); } public void dosomething(data) { /do real thing } }

3- phone call in actvitiy when asynctask done

public class myactivity extends activity { fragment mmyfragment fragment; //stuff, initializate fragment, show fragment, etc. private class myasynctask extends asynctask { //stuff @override protected void onpostexecute(object result) { ((onxlistener) myactivity.this.mmyfragment).onx(result); } } }

java android listener