<ImageButton> 꾸미기

values/colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#6200EE</color>
    <color name="colorPrimaryDark">#3700B3</color>
    <color name="colorAccent">#03DAC5</color>

    <integer name="alpha_pressed">50</integer>
</resources>

<integer name="alpha_pressed">50</integer>  추가

 

 

 

 

 

 

 

 

drawable/btn_setting.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <bitmap android:alpha="@integer/alpha_pressed" android:src="@drawable/ic_setting" />
    </item>
    <item android:state_pressed="false" android:drawable="@drawable/ic_setting" />
</selector>

btn_setting.xml

 

 

 

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:gravity="center"
    android:background="#BBBBFF"
    tools:context=".MainActivity">

    <ImageButton
        android:id="@+id/btnSetting"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:background="@drawable/btn_setting"/>

</LinearLayout>

activity_main.xml

 

 

 

 

MainActivity.kt

package com.jwsoft.kotlinproject

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        btnSetting.setOnClickListener {
            Toast.makeText(applicationContext, "Setting", Toast.LENGTH_SHORT).show()
        }
    }

}

실행 결과