To use layout_marginLeft in a button style applied as a theme?

Question

I used an attribute layout_marginLeft="30dip" in a style defined for buttons. When I apply this style individually for each button, the left margin is placed as I wanted.

But then I defined a theme, where I assigned my button style to the attribute android:buttonStyle and applied it to my project.
However, the left margin property is ignored. Any idea what I must do here?

style.xml as follows:

<style name="btnstyle" parent="@android:style/Widget.Button">
    <item name="android:layout_height">wrap_content</item>
    <item name="android:layout_width">wrap_content</item>
    <item name="android:layout_marginLeft">30dip</item>
    <item name="android:textColor">#FFFFFF</item>       
</style> 

<style name="appstyle" parent="android:Theme"> 
    <item name="android:buttonStyle">@style/btnstyle</item> 
</style>

Answer 1

It looks like this can be achieved by wrapping an insets tag around the shape.

Like this:

<inset xmlns:android="http://schemas.android.com/apk/res/android"
    android:insetLeft="5dp"
    android:insetRight="5dp"
    android:insetTop="5dp"
    android:insetBottom="5dp">

<shape  
    android:shape="rectangle">
    <solid 
        android:color="#fff"/>
    <stroke
        android:width="1dp"
        android:color="#333"/>
    <corners 
        android:radius="10dp"/>
</shape>
</inset>