Decent-looking Android buttons using only shape drawables

button_background_default.xml

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

    <item>
        <shape android:shape="rectangle" >
            <solid android:color="@color/darkorange" />

            <padding
                android:bottom="1dp"
                android:left="1dp"
                android:right="1dp"
                android:top="1dp" />

            <corners
                android:bottomLeftRadius="13dp"
                android:bottomRightRadius="13dp"
                android:topLeftRadius="13dp"
                android:topRightRadius="13dp" />
        </shape>
    </item>
    <item>
        <shape android:shape="rectangle" >
            <stroke
                android:width="1dp"
                android:color="@color/lightorange" />

            <gradient
                android:angle="270"
                android:endColor="@color/lightorange"
                android:startColor="@color/darkorange" />

            <corners
                android:bottomLeftRadius="12dp"
                android:bottomRightRadius="12dp"
                android:topLeftRadius="12dp"
                android:topRightRadius="12dp" />
        </shape>
    </item>

</layer-list>

button_background_pressed.xml

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

    <item>
        <shape android:shape="rectangle" >
            <solid android:color="@color/darkorange" />

            <padding
                android:bottom="1dp"
                android:left="1dp"
                android:right="1dp"
                android:top="1dp" />

            <corners
                android:bottomLeftRadius="13dp"
                android:bottomRightRadius="13dp"
                android:topLeftRadius="13dp"
                android:topRightRadius="13dp" />
        </shape>
    </item>
    <item>
        <shape android:shape="rectangle" >
            <stroke
                android:width="1dp"
                android:color="@color/lightorange" />

            <gradient
                android:angle="270"
                android:endColor="@color/darkorange"
                android:startColor="@color/lightorange" />

            <corners
                android:bottomLeftRadius="12dp"
                android:bottomRightRadius="12dp"
                android:topLeftRadius="12dp"
                android:topRightRadius="12dp" />
        </shape>
    </item>

</layer-list>

colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="lightorange">#d98800</color>
    <color name="darkorange">#b44a00</color>
</resources>	

selector_button_background.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/button_background_pressed" />
    <item android:drawable="@drawable/button_background_default" />
</selector>