How to define a screen-size specific animation in XML

I created an Animation for the Fragments in my application. The Animation animates moving between tabs, for that purpose I need to animate the current Fragment to move completely off screen while the need Fragment slides in from the opposite side. Kind of like the Animation the ViewPager uses.

I need to specify an absolute starting and ending position of the View and since different devices have different dimensions I cannot define an Animation in XML that fits all devices. On a bigger device the View might not slide of screen completely and on a smaller device the View moves to much and continues moving when he is already off screen.

So I guess my question is: How can I define an animation in XML which will slide a Fragment off screen and at the same time fit on all devices?

My animation:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">      

  <objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator"
    android:propertyName="x" 
    android:valueType="floatType"
    android:valueTo="720" 
    android:valueFrom="0"
    android:duration="300"/>  

</set>