Button not appearing correctly on Android 2.3

Button not appearing correctly on Android 2.3

I have a Button set up like this:
<Button
android:id="@+id/sendBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Send"
android:padding="-5dp"
android:paddingBottom="-10dp"
android:background="@color/red"/>
Here is how it looks like in Android 4.0 and above:
http://i.imgur.com/2P9WEWp.png?1
Here is how it looks like in Android 2.3: http://i.imgur.com/4oXSN2P.png?1
As you can see, the 2.3 button seems squished together and very small. How
can I fix this so new versions and 2.3 atleast have same resemblance?