java - Android Object Serializes itself from method -

i need , object containing settings in primitive types able load , save , android shared preferences calling load or save method object.

i have created class called thepreferences.java, class has few primitive fields. have created 2x methods within class load , save class , sharedpreferences. see below code used in class:

import android.content.context; import android.content.sharedpreferences;  import com.google.gson.gson; import com.google.gson.jsonserializer;  import android.content.sharedpreferences; import android.support.v7.app.appcompatactivity; import android.util.log;  import java.io.serializable;  public class thepreferences extends appcompatactivity implements serializable {      private static final string prefs_name = "thepreferences";     private static final string pref_text = "pref_text";     public static final string tag = "wpc";      public boolean loggedin = false;     public int deviceid = 0;     public int userid = 0;     public string email = "";     public string devicealias = "";      public thepreferences() {     }      public thepreferences(boolean loggedin, int deviceid, int userid, string email, string devicealias) {         this.loggedin = loggedin;         this.deviceid = deviceid;         this.userid = userid;         this.email = email;         this.devicealias = devicealias;     }       public boolean loadthepreferences(context c) {          sharedpreferences pref = c.getsharedpreferences(prefs_name, mode_private);         if (pref.contains(pref_text)) {             string thejson = pref.getstring(pref_text, null);             log.i(tag, "the json string loaded shared preferences : " + thejson);             thepreferences p = new gson().fromjson(thejson, thepreferences.class);             this.devicealias = (p.devicealias);             this.deviceid = (p.deviceid);             this.email = (p.email);             this.loggedin = (p.loggedin);             return true;          } else {             log.i(tag, "could not load sharedpreferences, value not exist.");             return false;         }      }      public static boolean savethepreferences(context c,thepreferences p){          gson gson = new gson();          string thejson = gson.tojson(p);         c.getsharedpreferences(prefs_name,mode_private)                 .edit()                 .putstring(pref_text,thejson)                 .commit();          return true;     }         @override     public string tostring() {         return "thepreferences{" +                 "loggedin=" + this.loggedin +                 ", deviceid=" + this.deviceid +                 ", userid=" + this.userid +                 ", email='" + this.email + '\'' +                 ", devicealias='" + this.devicealias + '\'' +                 '}';     }   } 

i try call activity load , save preferences follow:

contextofapplication = getapplicationcontext(); thepreferences preferencesobj = new thepreferences(true,12345,552441,"abc@123.com","thedeivcealias"); preferencesobj.savethepreferences(contextofapplication,preferencesobj);  preferencesobj.loadthepreferences(contextofapplication); 

i cannot execute past savethepreferences() method. keep on crashin stackoverflow exeption , cannot figure out why.'

can please advise if there way of doing or maybe have gone wrong?

thank in advance

passing prefernecesobj itself

preferencesobj.savethepreferences(contextofapplication,preferencesobj); 

change function to:

public boolean savethepreferences(context c){      gson gson = new gson();      string thejson = gson.tojson(this);     c.getsharedpreferences(prefs_name,mode_private)             .edit()             .putstring(pref_text,thejson)             .commit();      return true; } 

then call this:

preferencesobj.savethepreferences(contextofapplication);