Avoid direct translation of “public static final” with ProGuard

Question

How can i tell to ProGuard not to do this?

In Class A
  Toast.makeText(getApplicationContext(), Utility.NO_SESSION, 0).show();
-> with ProGuard  <--
  Toast.makeText(getApplicationContext(), "Please login", 0).show();

In Class Utility
  public static final String NO_SESSION = "Please login";
-> with ProGuard  <--
  this string does not even exist

This just makes things easier to read

Answer 1

It really makes no difference to someone trying to read reverse engineered code whether they have to look up a constant or it's inline.

But if you like you can add:

-keep class your.package.Utility { public static *; }

To your proguard-project.txt