As described on Android Developer site:
A drawable defined in XML that insets another drawable by a specified distance. This is useful when a View needs a background that is smaller than the View's actual bounds.
http://developer.android.com/guide/topics/resources/drawable-resource.html#Inset
Instead of just moving the background and leaving the content in place in my case the inset is also moving the TextView.
This is the layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg_inset"
android:orientation="horizontal" >
<TextView
android:id="@+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Some text"
android:textSize="23sp" />
</LinearLayout>
This is the bg_inset drawable
<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@android:color/darker_gray"
android:insetLeft="100dp" />
And this is the result I get: