android - AlertDialog doesn't appear, why? -


ok want show alertdialog blank space without message or buttons. know what's going wrong? main class including dialog:

public class mainactivity extends activity {  @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);     } public void createdialog1(view view){ final dialogfragment dfragment1=new dialogfragment();     dfragment1.show(getfragmentmanager(), "alarm1");     alertdialog.builder builder = new alertdialog.builder(getapplication());     builder.setmessage(r.string.create_alarm1);      builder.setpositivebutton(r.string.yes, new dialoginterface.onclicklistener() {         @override         public void onclick(dialoginterface dialog, int which) {                          intent intent1 = new intent(alarmclock.action_set_alarm)                 .putextra(alarmclock.extra_message, "you have set alarm first hour @ 6:30 am")                 .putextra(alarmclock.extra_hour, 6)                 .putextra(alarmclock.extra_minutes, 30); }    if (intent1.resolveactivity(getpackagemanager()) != null) {                 startactivity(intent1);                 dfragment1.dismiss();             }         }      });     builder.setnegativebutton(r.string.cancel, new dialoginterface.onclicklistener() {         @override         public void onclick(dialoginterface dialog, int which) {             dfragment1.getdialog().cancel();          }     });alertdialog dialog1=builder.create();  }

you need show after build, add:

dialog1.show();

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