public class AthleteCreation extends Fragment implements View.OnClickListener, AdapterView.OnItemSelectedListener{

Communicator communicator;
Button btnAdd;
EditText editFirstName, editLastName, editAge, editTier;
Spinner spinner;
ArrayAdapter<CharSequence> adapter;
String[] gender = {"male", "female"};

public AthleteCreation() {

}
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_athlete_creation, container, false);
}

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
}

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    initializeVariables();
    adapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);
    spinner.setOnItemSelectedListener(this);
    btnAdd.setOnClickListener(this);
}

@Override
public void onDetach() {
    super.onDetach();
}

public void initializeVariables(){
    btnAdd = (Button) getActivity().findViewById(R.id.btnAdd);
    editFirstName = (EditText) getActivity().findViewById(R.id.editFirstName);
    editLastName = (EditText) getActivity().findViewById(R.id.editLastName);
    editAge = (EditText) getActivity().findViewById(R.id.editAge);
    editTier = (EditText) getActivity().findViewById(R.id.editTier);
    spinner = (Spinner) getActivity().findViewById(R.id.spinnerGender);
    adapter = ArrayAdapter.createFromResource(getActivity(), R.array.spinnerGender, R.layout.support_simple_spinner_dropdown_item);
}

@Override
public void onClick(View v) {
    switch(v.getId()){
        case R.id.btnAdd:
            Athlete athlete = new Athlete();
            if(editFirstName.getText().length() == 0 || editLastName.getText().length() == 0
                    || editAge.getText().length() == 0 || editTier.getText().length() == 0){
                Toast.makeText(getActivity(), "Fill in all fields!", Toast.LENGTH_SHORT).show();
            }else{
                athlete.setFirstName(editFirstName.getText().toString());
                athlete.setLastName(editLastName.getText().toString());
                athlete.setAge(Integer.parseInt(editAge.getText().toString()));
                athlete.setGender();
                athlete.setEvent("");
                athlete.setTier(Integer.parseInt(editTier.getText().toString()));
                communicator = (Communicator) getActivity();
                communicator.send(athlete);
            }
            break;
    }
}

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

}

@Override
public void onNothingSelected(AdapterView<?> parent) {

}
public String spinnerGender(String gender){
    return gender;
}