alertdialog - In Android multiple checkboxes, checkbox Remain checked that I have selected even when close my app -

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i have 3 checkboxes in alertdialog. want when click on sencond checkbox remain checked until user desn't click on other checkbox per his/her convince. here code please provide sugestions.

edit: means 1 checkbox remain clicked application closed user.

my code: 

    case sync_alert:         alertdialog.builder alertbuilder = new alertdialog.builder(this);         alertbuilder.setmessage("synchronization");         alertbuilder.setcancelable(false);         layoutinflater buildinflater = this.getlayoutinflater();         view syncview= buildinflater.inflate(r.layout.sync_layout, null);         alertbuilder.setview(syncview);         defaultchkbox = (checkbox)syncview.findviewbyid(r.id.defaultchkbox);         after15mint = (checkbox)syncview.findviewbyid(r.id.after15mint);         afternmint = (checkbox)syncview.findviewbyid(r.id.afternmint);         alarms = (alarmmanager) getapplicationcontext().getsystemservice(context.alarm_service);         alertbuilder.setpositivebutton("ok", new dialoginterface.onclicklistener()         {             public void onclick(dialoginterface dialog, int which)             {                 //implement search method here                 if(defaultchkbox.ischecked())                 {                     //some code here                 }                 else if(after15mint.ischecked())                 {                      //some code here                 }                 else                 {                     //some code here                 }                }        });         alertbuilder.setnegativebutton("cancel", new dialoginterface.onclicklistener()         {             public void onclick(dialoginterface dialog, int which)              {                 dialog.dismiss();             }         });             alertdialog alertdialog = alertbuilder.create();             alertdialog.show();


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