[안드로이드]스위치(Switch) On, Off 만들어 보기

2020/12/11 - [안드로이드] - [안드로이드]달력(CalendarView) 만들어보기

이번 시간에는 스위치를 만들어보겠습니다.

On, Off 기능을 가진 간단한 예제입니다. 

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="OFF"
        android:textSize="30sp"
        android:layout_above="@+id/switchView"
        android:layout_centerHorizontal="true"/>

    <Switch
        android:id="@+id/switchView"
        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.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    Switch switchView;
    TextView today;

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

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

        switchView.setOnCheckedChangeListener(new Switch.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

                if(isChecked){
                    today.setText("ON");
                }else{
                    today.setText("OFF");
                }
            }
        });
    }
}

3. 실행화면