calling a button or a textfield from another class | android -


i have tried use edittext in list select listener can't see main activity taking me error @ 

edt.setvisibility(view.visible);

so please if have around me

public class mainactivity extends activity { static int hello_id = 1; boolean flag = false; countdowntimer timer; //the strings of notifications string titlepills = "time take panadol",descriptionpills  = "panadol"; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);  spinner spinner = (spinner) findviewbyid(r.id.spinner1);   arrayadapter<charsequence> adapter = arrayadapter.createfromresource(this,          r.array.planets_array, android.r.layout.simple_spinner_item);   adapter.setdropdownviewresource(android.r.layout.simple_spinner_dropdown_item);   spinner.setadapter(adapter);   spinner.setonitemselectedlistener(new spinneractivity());    chronometer test = new chronometer(this);  button btn = (button)findviewbyid(r.id.button1);  edittext edt = (edittext)findviewbyid(r.id.edittext1);    //hide button , edit text  btn.setvisibility(view.gone);  edt.setvisibility(view.gone);   } //********************************************************************************* public class spinneractivity extends activity implements onitemselectedlistener {       public void onitemselected(final adapterview<?> parent, view view,              int pos, long id) {          string select = parent.getitematposition(pos).tostring();            if(select.equals("type timee"))         {         //edt error can't resolved              edt.setvisibility(view.visible);         }

try this..

edittext edt;

as globle variable

edt = (edittext)findviewbyid(r.id.edittext1);

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