Is there a way to determine Android physical screen size?

It took a fair bit of research, but in the end it was pretty easy. Hopefully this serves as a reasonable example of how to interact with Android's Java environment from within Unity.

 using UnityEngine;
 
 public class DisplayMetricsAndroid {
     
     // The logical density of the display
     public static float Density { get; protected set; }
     
     // The screen density expressed as dots-per-inch
     public static int DensityDPI { get; protected set; }
     
     // The absolute height of the display in pixels
     public static int HeightPixels { get; protected set; }
     
     // The absolute width of the display in pixels
     public static int WidthPixels { get; protected set; }
     
     // A scaling factor for fonts displayed on the display
     public static float ScaledDensity { get; protected set; }
     
     // The exact physical pixels per inch of the screen in the X dimension
     public static float XDPI { get; protected set; }
     
     // The exact physical pixels per inch of the screen in the Y dimension
     public static float YDPI { get; protected set; }
     
     static DisplayMetricsAndroid() {
         // Early out if we're not on an Android device
         if (Application.platform != RuntimePlatform.Android) {
             return;
         }
         
         // The following is equivalent to this Java code:
         //
         // metricsInstance = new DisplayMetrics();
         // UnityPlayer.currentActivity.getWindowManager().getDefaultDisplay().getMetrics(metricsInstance);
         //
         // ... which is pretty much equivalent to the code on this page:
         // http://developer.android.com/reference/android/util/DisplayMetrics.html
         
         using (
             AndroidJavaClass unityPlayerClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer"),
             metricsClass = new AndroidJavaClass("android.util.DisplayMetrics")
         ) {
             using (
                 AndroidJavaObject metricsInstance = new AndroidJavaObject("android.util.DisplayMetrics"),
                 activityInstance = unityPlayerClass.GetStatic<AndroidJavaObject>("currentActivity"),
                 windowManagerInstance = activityInstance.Call<AndroidJavaObject>("getWindowManager"),
                 displayInstance = windowManagerInstance.Call<AndroidJavaObject>("getDefaultDisplay")
             ) {
                 displayInstance.Call("getMetrics", metricsInstance);
                 Density = metricsInstance.Get<float>("density");
                 DensityDPI = metricsInstance.Get<int>("densityDpi");
                 HeightPixels = metricsInstance.Get<int>("heightPixels");
                 WidthPixels = metricsInstance.Get<int>("widthPixels");
                 ScaledDensity = metricsInstance.Get<float>("scaledDensity");
                 XDPI = metricsInstance.Get<float>("xdpi");
                 YDPI = metricsInstance.Get<float>("ydpi");
             }
         }
     }
 }