Android SharedPreferences not working -

i tring solve problem strange

i have app working great in of testing devices, after factory reset on nexus 5, when try int sharedpreferences code

level_maximo_alcanzado = sp.getint(sp_nivel_juego_maximo, 1);

it give me string (but in nexus 5, in other devices give me int in nexus 5 causing exception java.lang.string cannot cast java.lang.integer )

if value of string code

string prueba = sp.getstring(sp_nivel_juego_maximo, "1"); 

i value of 5t+sntivfha=

i dont have idea why pass in nexus 5 after factory reset

if can give tip follow awesome, lost @ point

code - ( ctx context object)

 public static sharedpreferences sp;  public static sharedpreferences.editor editor;    if(sp == null) sp = ctx.getsharedpreferences(sp_name, context.mode_private);   if(editor  == null) editor = sp.edit();    editor.putint(sp_dinero, dinero);   editor.commit(); 

additional info

i tryed unistall app , reboot device

i used obscuredsharedpreferences class encrypt them , in class give me pad block corrupted exception, swap sharedpreferences same error

i made factory reset due issue phonne said full when 5gb used

so maybe memory issue on device?

i made reset ( wipe cache , wipe data, , factory reset bootloader) , working again

i think memory got corrupted , failing.