First of all, compare Strings with equals()
if (list_2.getExtras().getString("iname").equals("2"))
The values in extras are not intended to be replaced. You put extras to pass the data when Activity is started.
It's hard to understand your intentions, but if the iname must be changed in Ekran, you should rather call
startActivityForResult(ekranIntent, requestCode)
and analyze the data returned in
onActivityResult()
Overridden in your current Activity.