1. 일반 버튼에 이미지.xml 을  백그라운드로 적용한 경우 효과가 좋다.

 
텍스트를  자유롭게 버튼에서 변경이 가능하다.

 

 

2. 버튼에  xml 이 아닌  이미지 적용시  버튼 효과가 나타나지  않는다. 또한 xml 을 적용한 다 할 지라도  android 에서
제공하는 이미지 적용은 효과가 없다.

 

3. 이미지 버튼 텍스트를 이미지와 함께 변경후 적용 해야 하기때문에 텍스트 변경이  어렵다.

 

 

R.layout.activity_main

 

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="kr.co.dothome.braverokmc.tutorial8.MainActivity">

    <ImageButton
        android:id="@+id/imageButton4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/b1"
        app:srcCompat="@drawable/button1"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="172dp"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginBottom="8dp"
        app:layout_constraintVertical_bias="0.282" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="37dp"
        android:background="@drawable/star_btn"
        android:text="1"
        app:layout_constraintBottom_toTopOf="@+id/imageButton4"
        tools:layout_editor_absoluteX="256dp" />

    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginLeft="46dp"
        android:layout_marginRight="8dp"
        android:background="@drawable/button2"
        android:text="1"
        android:textSize="36sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.05"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent" />

    <ImageButton
        android:id="@+id/imageButton5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@android:drawable/btn_star_big_on"
        app:srcCompat="@drawable/star_btn"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        app:layout_constraintBottom_toTopOf="@+id/imageButton4"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintHorizontal_bias="0.27" />
</android.support.constraint.ConstraintLayout>

 

 

 

button1.xml

<?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/b2" />
    <item android:state_hovered="true" android:drawable="@drawable/q1" />
    <item android:drawable="@drawable/b1" />
</selector>

 

 

button2.xml

<?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/q1" />
    <item android:drawable="@drawable/q2" />

</selector>

 

 

str_btn.xml

 

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">


    <item android:drawable="@android:drawable/btn_star_big_on" />
    <item android:state_pressed="true" android:drawable="@android:drawable/btn_star_big_off" />
</selector>