How to disable the EDIT-TEXT in android for entire activity -

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how disable edit-text after clicking button entire activity?
here have 2 or more activities

example:
activity , b contains both edit_text , button
in activity entered values in edit_text , click ok button in coding part mentioned edittext1.setenabled(false). here edittext1 disabled
after switching activity b, , activity b activity a. edittext1 enabled
can 1 tell me how disable edittext1 entire activity
in advance 

add = (button) findviewbyid(r.id.button1);     add.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view v) {              ed = (edittext) findviewbyid(r.id.edittext1);              final string sq=ed.gettext().tostring();             if(sq.equals("a") || sq.equals("a"))             {              result++;             display.settext(""+result);}         }     });

in activity a read edittext1 i.e findviewbyid , set edittext1.setenabled(false) on onresume() method of activity lifecycle.

on button clicked use :

    add = (button) findviewbyid(r.id.button1);         add.setonclicklistener(new view.onclicklistener() {              @override             public void onclick(view v) {                  ed = (edittext) findviewbyid(r.id.edittext1);               sharedpreferences prefs = preferencemanager.getdefaultsharedpreferences(activitya.this);               editor ed = prefs.edit();               ed.putboolean(button_clicked, true);               ed.commit();               edittext1.setenabled(false);                final string sq=ed.gettext().tostring();                 if(sq.equals("a") || sq.equals("a"))                 {                  result++;                 display.settext(""+result);}             }          });

on onresume :

  @override protected void onresume() {     sharedpreferences prefs = preferencemanager.getdefaultsharedpreferences(this);      boolena buttonclicked = prefs.getboolean(button_clicked, false);       if(buttonclicked){      edittext edittext1 = (edittext) findviewbyid(r.id.edittext1);     edittext1.setenabled(false);     } }

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