CheckBox
extends from TextView
so to retrieve a text from it is quite simple :
String text = thisBox.getText().toString();
http://developer.android.com/reference/android/widget/CheckBox.html
If you want to retrieve the key name of the string. I suggest you put it into the tag of the object :
thisBox.setTag(getResources().getResourceEntryName(R.string. checkList1);
Retrieve it like that :
String text = (String)thisBox.getTag();
that should do the trick.