Retrieve value from a method declared as public void

Question

Hi I am new to Android and Java, and I am writing a Date Picker Fragment class which extends DialogFragment and implements DatePickerDialog.OnDateSetListener due to this I have to declare method public void onDateSet(DatePicker view, int year, int month, int day), in which I am setting my new date in a public String variable.

Is it possible I can use this public String variable in my main activity to show the value in a TextView? If yes How?

My Main Activity code is:

public class TARForm extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {

    EditText departuredate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tarform);
        departuredate = (EditText) findViewById(R.id.departure_date);
    }

    public void showDatePickerDialog(View v) {
        DialogFragment newFragment = new DatePickerFragment();
        newFragment.show(getFragmentManager(), "datePicker");
    }
}

And DatePickerFragment Code is:

public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener{

    int selectyear, selectmonth, selectday;
    public String date;

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Use the current date as the default date in the picker
        final Calendar c = Calendar.getInstance();
        int year = c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH);
        int day = c.get(Calendar.DAY_OF_MONTH);
        return new DatePickerDialog(getActivity(), this, year, month, day);
    }

    public void onDateSet(DatePicker view, int year, int month, int day) {

        selectday = day;
        selectmonth = month+1;
        selectyear = year;
        date = selectday + "-" + selectmonth + "-" + selectyear;
    }
}

If you can guide with this information, how I can get the "date" into MainActivity departuredate? Thanks.

I am sharing the code for my Main Activity and Fragment Class. Please help. — rodaxyz, Feb 28 '17 at 12:27
You can use `OnDismissListener`, should check this [answer](http://stackoverflow.com/a/23786151/5769824) — Hmm, Feb 28 '17 at 14:45

Ashish Kumar · Answer 1 · 2017-02-28T12:51:42.593

0

    //In your actiivty
String date=null;

public void setDate(String date){
    this.date=date;
    //set this date in your text View
}


   //In your fragment

Context context;
@Override
public void onAttach(Context context){
    this.context=context;
}

public void onDateSet(DatePicker view, int year, int month, int day){
    String date=//get Date over here
    ((TARForm)context).setDate(date)
}

edited Feb 28 '17 at 12:51

answered Feb 28 '17 at 12:10

Ashish Kumar

374
4
11

Is it possible for you to explain with an example, I am new to android. – rodaxyz Feb 28 '17 at 12:18
Did you try the thing as i said ? – Ashish Kumar Feb 28 '17 at 12:48
Okay lemme know then – Ashish Kumar Feb 28 '17 at 12:51
App crashed while testing. Error: android.util.SuperNotCalledException: Fragment DatePickerFragment{884caec #0 datePicker} did not call through to super.onAttach() – rodaxyz Feb 28 '17 at 12:56
yes in onAttach(), you have to call super.onAttach() before this.context=context – Ashish Kumar Feb 28 '17 at 13:31

ShekharKG · Answer 2 · 2017-02-28T17:13:00.410

0

You can try below code in your fragment inside onDateSet() method

public void onDateSet(DatePicker view, int year, int month, int day) {

        selectday = day;
        selectmonth = month+1;
        selectyear = year;
        date = selectday + "-" + selectmonth + "-" + selectyear;

        if(getActivity() instanceOf TARForm){
           ((TARForm)getActivity()).departuredate.setText(date);
        }
    }

and in your TARForm activity make public EditText departuredate;if your Activity and Fragment are in different folders

edited Feb 28 '17 at 17:13

answered Feb 28 '17 at 12:16

ShekharKG

675
6
11

Updated my answer, please check – ShekharKG Feb 28 '17 at 17:13
@rodaxyz Please accept the answer to close this Question – ShekharKG Mar 11 '17 at 06:31

Retrieve value from a method declared as public void

2 Answers2