package com.laxture.lib;

public class PrefKeys {

    public static final String PREF_KEY_APP_TO_BACKGROUND = "app_to_background";
    public static final String PREF_KEY_APP_TO_BACKGROUND_TIME = "app_to_background_time";
    public static final String PREF_KEY_DEVICE_ID = "device_id";

}

@@ -30,13 +30,17 @@
 lic 
-class
+interface
  Pre
@@ -52,36 +52,16 @@
  %7B%0A%0A    
-public static final 
 String P
@@ -113,36 +113,16 @@
 d%22;%0A    
-public static final 
 String P
@@ -188,28 +188,8 @@
     
-public static final 
 Stri

Change constant to interface