<Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
    android:keyWidth="@dimen/keyboard_key_width"
    android:keyHeight="@dimen/keyboard_key_height"
    android:horizontalGap="@dimen/keyboard_key_horizontal_tiny_gap"
    android:verticalGap="@dimen/keyboard_key_vertical_gap" />