[Android App 개발 스터디] #27 ButtonSelector

  ButtonSelector을 통해 버튼을 눌렀을 때와 안 눌렀을 때를 기준으로 버튼에 효과를 줄 것이다.

https://www.youtube.com/watch?v=9E0WwR_6P9w 

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1. selector_button.xml 생성 (drawable 폴더 안에)

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <shape>
            <solid android:color="#64FFDA"/>
            <corners android:radius="10dp"/>
        </shape>
    </item>

    <item android:state_pressed="false">
        <shape>
            <solid android:color="#E040FB"/>
            <corners android:radius="10dp"/>
        </shape>
    </item>
</selector>

- state_pressed가 true값이라면 클릭했을 때 효과이다.

- state_pressed가 false값이라면 클릭하지 않았을 때의 효과이다.

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2. selecotr_button_img.xml 생성하기 (drawable 폴더 안에)

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item  android:state_pressed="true" android:drawable="@drawable/ic_launcher_background" >

    </item>

    <item android:state_pressed="false" android:drawable="@drawable/ic_launcher_background">

    </item>
</selector>

- 여기치 못한 상황으로 drawable 폴더 내에 같은 사진으로 했다. (drawable 폴더에 새로운 사진을 추가해 효과를 줘보자)

 

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3. activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">
    
    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="192dp"
        android:backgroundTint="#000000"
        android:backgroundTintMode="add"
        android:text=""
        android:background="@drawable/selector_button_img"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.501"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="136dp"
        android:text="태윤"
        android:textColor="#ffffff"
        android:textStyle="bold"
        android:background="@drawable/selector_button"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.501"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button"
        app:layout_constraintVertical_bias="0.055" />


</androidx.constraintlayout.widget.ConstraintLayout>

- 버튼 2개를 만들어준다.

- 첫번째 버튼에 backgroundTint 와 backgroundTintMode를 추가해준다.

 

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4. values 폴더 내에 themes 폴더 내에 themes.xml에 들어간다.

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.ButtonSelector" parent="Theme.AppCompat.Light">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_500</item>
        <item name="colorPrimaryVariant">@color/purple_700</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
        <!-- Customize your theme here. -->
    </style>
</resources>

- stlye의 parent를 위와 같이 바꿔준다. (이렇게 해주지 않으면 색 지정이 이상해질 수 있음) 

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※ 실행 결과