android - Sending Sms in background through AsyncTask is not working -

on click of button want send sms numbers got database in background. if call smsmanager directly on click works. through asynctask not working. please me out. here code ..

public class sendsmsactivity extends activity {     button buttonsend;     edittext textphoneno;     spinner level;     edittext textsms;       private arraylist studentinfo = new arraylist();      private databasehelper mhelper;     private sqlitedatabase database;     private string levelselected,sms;        @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.send_sms);          buttonsend = (button) findviewbyid(r.id.buttonsend);         level = (spinner) findviewbyid(r.id.spinnersms);         textsms = (edittext) findviewbyid(r.id.edittextsms);         string levelselected = level.getselecteditem().tostring();         string sms = textsms.gettext().tostring();          buttonsend.setonclicklistener(new view.onclicklistener() {              @override             public void onclick(view v) {                  string levelselected = level.getselecteditem().tostring();                 string sms = textsms.gettext().tostring();                 //getphonenum(levelselected, sms);                  new mysmstask().execute(levelselected, sms);                }         });     }      private void getphonenum(string levelselected, string sms){          mhelper = new databasehelper(this);         database = mhelper.getwritabledatabase();         cursor mcursor = database.rawquery("select phone student level= '" + levelselected + "'", null);         studentinfo.clear();          if (mcursor.movetolast()) {             {                  string phonenumber = (mcursor.getstring(mcursor.getcolumnindex(databasehelper.phone)));                 log.d("debug", phonenumber);                    try {                     smsmanager smsmanager = smsmanager.getdefault();                     smsmanager.sendtextmessage(phonenumber, null, sms, null, null);                     toast.maketext(getapplicationcontext(), "sms sent!",                             toast.length_long).show();                 } catch (exception e) {                     toast.maketext(getapplicationcontext(),                             "sms faild, please try again later!",                             toast.length_long).show();                     e.printstacktrace();                 }             }             while (mcursor.movetoprevious());         }       }      private class mysmstask extends asynctask<string, string, integer> {           @override         protected integer doinbackground(string... params) {              toast.maketext(getbasecontext(), "senescent "  + params, toast.length_short).show();              getphonenum(levelselected, sms);             return null;          }          @override         protected void onpostexecute(integer result) {             toast.maketext(getbasecontext(), "sent "  + " messages", toast.length_short).show();         }          @override         protected void onpreexecute() {}       }  } 

u can not directly use toast in doinbackground use handler show toast message may that's why problem arise.

please check method getphonenum(levelselected, sms) called or not

private handler handler = new handler();  @override  protected integer doinbackground(string... params) {            handler.post(new runnable() {                     @override                     public void run() {                         try {                              toast.maketext(getbasecontext(), "senescent " + params, toast.length_short).show();                         } catch (jsonexception e) {                             // todo auto-generated catch block                             e.printstacktrace();                         }                      }                  });     getphonenum(levelselected, sms);     return null;  }