android - SharedPreferences Not retrieving JsonArray, JsonObject after device reboot -


i have set jsonarray , jsonobject application class make objects global. values stored in json array retrieve before device reboot. after reboot json array show blank squre '[]' bracket. out reboot shows me value of json array. after reboot doesn't. suggestions or guide can this.

this application class

public class myapplicationclass extends application{ public static final string prefs_name = "prefsfile"; private jsonarray jsonarray=new jsonarray(); private jsonobject jsonobj=new jsonobject();  public jsonarray getjsonarray() {     return jsonarray; }  public void setjsonarray(jsonarray jsonarray) {     this.jsonarray = jsonarray; }  public jsonobject getjsonobj() {     return jsonobj; }  public void setjjsonobj(jsonobject jsonobj) {     this.jsonobj = jsonobj; }

}

here setting jsonarray & jsonobject

// jsonobj, jsonarray declare class variables                         //getting global jsonarray object                 final myapplicationclass appobj=(myapplicationclass )getapplicationcontext();                final jsonarray jsonarray=appobj.getjsonalarmarray();                // getting name of sharedpreferences file & mode               sharedprefs=getsharedpreferences(myapplicationclass.prefs_name, context.mode_private);               final jsonobject jsonobj =appobj.getjsonobj();                   btn.setonclicklistener(new onclicklistener() {          @override         public void onclick(view arg0) {             // todo auto-generated method stub             if(some condition)                 {                     jsonobj.put("value1", 1234);                     jsonobj.put("value2", 234);                     jsonobj.put("value3", 3);                  }                 else if(some condition))                 {                     jsonobj.put("value1", 12314);                     jsonobj.put("value2", 2314);                     jsonobj.put("value3", 31);                 }                  jsonarray.put(jsonobj);                 appobj.setjsonalarmarray(jsonarray);             editor= sharedprefs.edit();                 editor.putstring("key", jsonarray.tostring());                 system.out.println(jsonarray.tostring());                 editor.commit();         }     });

this way retrieving json array

btn2.setonclicklistener(new onclicklistener() {          @override         public void onclick(view arg0) {             // todo auto-generated method stub               sharedprefs=getsharedpreferences(myapplicationclass.prefs_name, 0);              try {                  jsonarray jsonarray=((myapplicationclass)getapplication()).getjsonalarmarray();                 system.out.println(jsonarray.tostring());                 toast.maketext(typesactivity.this, ""+jsonarray, toast.length_long).show();              } catch (exception e) {                 e.printstacktrace();             }           }     });

you forgot read json sharedpreferences:

btn2.setonclicklistener(new onclicklistener() {      @override     public void onclick(view arg0) {         // todo auto-generated method stub           sharedprefs=getsharedpreferences(myapplicationclass.prefs_name, 0);         string jsonarraystring = sharedprefs.getstring("key", null);         try {             if (jsonarraystring != null) {                 jsonarray jsonarray= new jsonarray(jsonarraystring)                  system.out.println(jsonarray.tostring());                 toast.maketext(typesactivity.this, ""+jsonarray, toast.length_long).show();             }         } catch (exception e) {             e.printstacktrace();         }       } });

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