Question

I’m using ListActivity, listview.

listView = getListView();

just working perfectly. I added footer view as

LayoutInflater inflater = getLayoutInflater();
listView.addFooterView( inflater.inflate( R.layout.footer, null ), null, false);

and everything was shiny but ugly, so i wanted to add this footer view (which contains only 1 edittext and only 1 button ) to header of listView as

LayoutInflater inflater = getLayoutInflater();
listView.addHeaderView( inflater.inflate( R.layout.footer, null ), null, false);

and suddenly everything goes wrong, and i get RuntimeException immediately.

Suspended(exception RuntimeException)
ActivityThread.performLaunchActivity(ActivityThread$ActivityRecord, Intent)
ActivityThread.handleLaunchActivity(ActivityThread$ActivityRecord, Intent)
ActivityThread.access$2200(ActivityThread, Activity$ActiviyRecord, Intent),
so on..

Why is it throws exception ? What is different between addFooterView and addHeaderView, and how can i add Header to ListActivity ?

UPDATE

So as you can read in comments, my logcat still doesn’t work, but i just tried next at this moment:

} catch(Exception e){ 
  Writer result = new StringWriter(); 
  PrintWriter printWriter = new PrintWriter(result);
  e.printStackTrace(printWriter);
  String error = result.toString(); 
}

and afterward i put breakpoint, and i can read error in expressions section. it said :

java.lang.IllegalStateException: Cannot add header view to list -- setAdapter has already been called. 

it was instructive for all of us. After change sort of commands, it works perferctly.

Answer 1

so if you want to add header view to your listView, you should do that severely before use setListAdapter() or else it causes an IllegalStateException.