Simple vector drawable with rounded corners:
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@color/button_text"/>
<stroke
android:width="1dip"
android:color="@color/button_stroke"/>
<corners android:radius="3dip"/>
<padding
android:bottom="@dimen/button_padding"
android:left="@dimen/button_padding"
android:right="@dimen/button_padding"
android:top="@dimen/button_padding"/>
</shape>