A static method to retrieve the screen inch of an Android device in Unity

GetScreenInch.cs

public static int GetScreenInch()
{
#if UNITY_ANDROID
	var displayMetrics = new AndroidJavaObject("android.util.DisplayMetrics");
	var heightPixels = displayMetrics.Get<int>("heightPixels");
	var widthPixels = displayMetrics.Get<int>("widthPixels");
	var xdpi = displayMetrics.Get<float>("xdpi");
	var ydpi = displayMetrics.Get<float>("ydpi");
	var x = widthPixels / xdpi;
	var y = heightPixels / ydpi;
	var size = (x * x) + (y * y);

	return Mathf.Sqrt(size);
#else
	return -1;
#endif
}