[안드로이드]달력(CalendarView) 만들어보기

2020/12/10 - [안드로이드] - [안드로이드]별점(RatingBar) 만들어보기

이번시간에는 캘린더를 만들어보겠습니다. 스마트폰 기본앱으로 들어가 있습니다. 

간단하게 달력에서 날짜를 선택하면 해당 날짜를 텍스트뷰에 보이도록 하겠습니다.

1. 화면구현(activity_main.xml)

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <TextView
        android:id="@+id/today"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="2020년12월11일"
        android:textSize="30sp"
        android:layout_above="@+id/calendarView"
        android:layout_centerHorizontal="true"/>

    <CalendarView
        android:id="@+id/calendarView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
         />

</RelativeLayout>

2. 기능구현(MainActivity.java)

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.CalendarView;
import android.widget.TextView;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;


public class MainActivity extends AppCompatActivity {

    CalendarView calendarView;
    TextView today;

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

        today = findViewById(R.id.today);
        calendarView = findViewById(R.id.calendarView);

        //날짜변환
        DateFormat formatter = new SimpleDateFormat("yyyy년MM월dd일");
        Date date = new Date(calendarView.getDate());
        today.setText(formatter.format(date));

        calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
            @Override
            public void onSelectedDayChange(@NonNull CalendarView view, int year, int month, int dayOfMonth) {
                String day;
                day = year + "년" + (month+1) + "월" + dayOfMonth + "일";
                today.setText(day);
            }
        });
    }
}

3. 실행화면