Center Text

[raedhamam]

After changing the drawables for button backgrounds, the text is not centered inside the button.

[StephenFerdinand]

For some reason the paddings aren't zero.
Set the padding left and right to zero and make the gravity centered on every button

in xml:
android:paddingLeft="0dp"
android:paddingRight="0dp"
android:gravity="center"

This should solve it!