Shows error while selecting other options from spinner

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Mobile

Android

Hi,

I have an array 'uname[i]' which store usernames from database through webservice.

It is assigned to spinner using Array Adapter. At run-time, the spinner shows username in it.

The problem is that when I try to change the usernames listed in it at run-time, the android shows error to 'force close'.

I couldn't find what the problem is. Please help.

Thanks in advance.

Codes is as given below.

sp_attention=(Spinner) findViewById(R.id.spAttention);
ArrayAdapter<String> adapter2 = new ArrayAdapter<String> (this,android.R.layout.simple_spinner_item,uname);
sp_attention.setAdapter(adapter2);
adapter2.notifyDataSetChanged();          

sp_attention.setOnItemSelectedListener(new OnItemSelectedListener()
{
 public void onItemSelected(AdapterView<?> arg0, View arg1,
             int arg2, long arg3) {

     AttentionSelected=sp_attention.getSelectedItem().toString();

     }
     public void onNothingSelected(AdapterView<?> arg0) {


     }
});