I have a few buttons in my Android app. They each look kinda like this:

```
<Button
    android:id="@+id/button_1"
    android:drawableTop="@drawable/an_icon"
    android:background="@drawable/a_background"
    android:layout_width="size_dp"
    android:layout_height="size_dp">
</Button>

```

Granted, I'm new to Android dev, but I can't figure out how to center the drawable in my button. I've tried the different drawableLocations, margins and padding for the button and its container, as well as drawablePadding, but I can't seem to get it done. Is there a way to center the drawable without abandoning Button for another View?