Getting Started with Android Programming - Day 59

Learn XMLDrawable

button_beat_box.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/button_beat_box_pressed"
          android:state_pressed="true"/>
    <item android:drawable="@drawable/button_beat_box_normal"/>
</selector>

button_beat_box_normal.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">

    <solid
        android:color="@color/dark_blue"/>

</shape>

button_beat_box_pressed.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            android:shape="oval">

            <solid
                android:color="@color/red"/>
        </shape>
    </item>
    <item>
        <shape
            android:shape="oval">

            <stroke
                android:width="4dp"
                android:color="@color/dark_red"/>
        </shape>
    </item>
</layer-list>