How not to update when scrolling list in android

I do not want my list view updated

when I look at the scroll list, it updates ...

I don't want this to happen ... what should I do

  <ListView android:id="@+id/android:list"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:layout_below="@id/edittxt_username"
              android:scrollbars="vertical"
                android:layout_marginBottom="0sp"
              />

okey edits my real need

am using the checkbox in my list "

final CheckBox chb = (CheckBox) v.findViewById (R.id.editcheckbox);

                    chb.setOnClickListener(new OnClickListener() {

                        @Override
                        public void onClick(View view) {
                            if (chb.isChecked() == true) {
                                CheckedMessages.add(f);

                            } else if (chb.isChecked() == false) {
                                CheckedMessages.remove(f);
                            }
                        }
                    });`

Suppose there are 20 items in a list .. I check the first one. After scrolling, I see that the 6th element is checked ... again scrollling, I see that the 13th element is checked ... I could have this because of an update ... why the reason?