How do I reference android:gravity values in a resource file?

Question

I have a layout with a TextView and I want the android:gravity attribute value to be pulled from another resource file, android:gravity="@???/item_align", where item_align is the name of a resource in another xml file. The typical values used in a layout, center or bottom or bottom|center_horizontal don't work. What type goes in the @???, integer works, if I replace the strings with the actual integer value ("center" replaced with 0x011). But, that's not a good solution.

So, the question(s): How do I refer to the value in the layout file, and what does the item look like in the resource file?

<TextView
   android:id="@+id/item_text"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignParentTop="true"
   android:layout_alignParentBottom="true"
   android:layout_alignParentLeft="true"
   android:layout_alignParentRight="true"
   android:layout_margin="1dp"
   android:layout_centerHorizontal="true"
   android:gravity="@???/item_align"
   android:text="65"
   android:textSize="20sp"
   android:typeface="sans"
   android:textStyle="bold"
   android:textColor="#000000" />

Answer 1

In order not to break the standard constants and avoid highlighting in red in Android Studio, you can create two styles (in styles.xml) in the /values and /values-sw600dp folder

/values/styles.xml

 <style name = "AppContainerLayout">
     <item name = "android:gravity">top|start</item>
 </style>

/values-sw600dp/styles.xml  

<style name = "AppContainerLayout">
    <item name = "android:gravity">center</item>
</style>

And just use in layout

<LinearLayout
             style = "@ style/AppContainerLayout"
             android:layout_width = "match_parent"
             android:layout_height = "wrap_content"
             android:orientation = "vertical">

             // childs
</LinearLayout>