Android

package com.example.medicalqueue;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CalendarView;
import android.widget.Spinner;
import android.widget.Toast;

import java.text.SimpleDateFormat;
import java.util.Date;

public class VisitDoctor extends AppCompatActivity {

    Spinner doctorspinner;
    CalendarView calendarView;
    String currentDate;
    Spinner timeSpinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_visit_doctor);

        ArrayAdapter<String> specialtyAdapter = new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item, DataBase.scecialtyList);
        specialtyAdapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);

        Spinner specialtySpinner = (Spinner) findViewById(R.id.specialty);
        specialtySpinner.setAdapter(specialtyAdapter);

        specialtySpinner.setPrompt("Вибір спеціальності");

        ArrayAdapter<String> doctorAdapter = new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item, DataBase.doctorList[(int)specialtySpinner.getSelectedItemId()]);
        specialtyAdapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);

        doctorspinner = (Spinner) findViewById(R.id.doctors);
        doctorspinner.setAdapter(doctorAdapter);

        doctorspinner.setPrompt("Вибір лікаря");

        specialtySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view,
                                       int position, long id) {
                ArrayAdapter<String> newAdapter = new ArrayAdapter<String>(VisitDoctor.this, R.layout.support_simple_spinner_dropdown_item, DataBase.doctorList[(int)parent.getSelectedItemId()]);
                doctorspinner.setAdapter(newAdapter);
            }

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

            }
        });

        calendarView = (CalendarView) findViewById(R.id.calendarView);
        calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {

            @Override
            public void onSelectedDayChange(CalendarView view, int year,
                                            int month, int dayOfMonth) {
                int mYear = year;
                int mMonth = month;
                int mDay = dayOfMonth;
                currentDate = new StringBuilder().append(mMonth + 1)
                        .append("-").append(mDay).append("-").append(mYear)
                        .append(" ").toString();

            }
        });

        ArrayAdapter<String> timeAdapter = new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item, DataBase.timeList);
        timeAdapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);

        timeSpinner = (Spinner) findViewById(R.id.times);
        timeSpinner.setAdapter(timeAdapter);
        timeSpinner.setPrompt("Час прийому");

    }


    public void Visit_click(View view) {
        if(currentDate == null) {
            SimpleDateFormat sdf = new SimpleDateFormat("MM-dd-yyyy");
            currentDate = sdf.format(calendarView.getDate());
        }

        String info = "Ви записані до " + doctorspinner.getSelectedItem().toString() + " " + currentDate + " на " + timeSpinner.getSelectedItem().toString();

        if(DataBase.reservedList.contains(info)){
            Toast.makeText(getApplicationContext(), "Час вже зарезервований. Виберіть іншу дату або час.", Toast.LENGTH_SHORT).show();
        }
        else {
            DataBase.reservedList.add(info);
            Toast.makeText(getApplicationContext(),
                    "Ви записані до " + doctorspinner.getSelectedItem().toString() + " " + currentDate + " на " + timeSpinner.getSelectedItem().toString(),
                    Toast.LENGTH_SHORT).show();
        }
    }
}