android - Reading data selected in TimePicker called from a Fragment -

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i have fragment has own layout , has choose time button along textview beneath it. opening timepickerfragment fragment when user clicks button. when user selects time, , clicks done, want populate textview contained in fragment. not sure how this.

all materials/tutorials online invoke timepicker activity. (obviously) have parent activity, since timepicker being used in fragment, limit scope as possible.
flow follows:
parentactivity > fragment (contains textview , button) > dialogfragment (timepicker)

here implementation:

public class timepickerfragment extends dialogfragment  implements timepickerdialog.ontimesetlistener {      @override     public dialog oncreatedialog(bundle savedinstancestate) {          int hour = 0;          int minute = 0;         boolean is24hour = false;           // ... code read shared preference, correct time format, theme, etc.          return new timepickerdialog(getactivity(), dialog_theme, this, hour, minute, is24hour); //dateformat.is24hourformat(getactivity())      }      @override     public void ontimeset(timepicker view, int hour, int minute) {          //textview textview = (textview) getview.findviewbyid(r.id.time_value); //nullpointerexception!          textview textview = (textview) view.findviewbyid(r.id.time_value); //also nullpointerexception!           // time chosen user         textview.settext(timeanddate.getdisplayabletime(time));          textview.clearfocus();      }  }

it belongs fragment invokes dialogfragment

findviewbyid looks view id in current view hierarchy. textview not child of timerview.

so need initialize textview in fragment not dialogfragment.

all fragment-to-fragment communication done through associated activity. 2 fragments should never communicate directly. use interface call activity , communciate time fragment.

http://developer.android.com/training/basics/fragments/communicating.html

dialogfragment --> parentactivtiy --> fragment

you can check example @

simple timepicker fragment activity


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