[안드로이드]DatePicker 달력(캘린더) 만들어보기

2020/12/23 - [안드로이드] - [안드로이드]TimePicker 내가 선택한 알람시간 텍스트뷰에 보여주기

이번 시간에는 달력을 만들어 보겠습니다.

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">

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

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_below="@+id/datePicker"
        android:text="날짜표시"
        android:textSize="30sp"
        />


</RelativeLayout>

2. 기능구현(MainActivity.java)

import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Build;
import android.os.Bundle;
import android.widget.DatePicker;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity {

    private DatePicker datePicker;
    private TextView textView;

    @RequiresApi(api = Build.VERSION_CODES.O)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        datePicker = findViewById(R.id.datePicker);
        textView = findViewById(R.id.textView);

        datePicker.setOnDateChangedListener(new DatePicker.OnDateChangedListener() {
            @Override
            public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {

                textView.setText(year + "년 " + monthOfYear + "월 "  + dayOfMonth + "일");
            }
        });
    }
}

3. 실행화면