Android simpleadapter problem

 SimpleAdapter adapter = new SimpleAdapter(this,getData(),R.layout.vlist,
                new String[]{"question_content","rbtn_a","rbtn_b","rbtn_c","rbtn_d"},
                new int[]{R.id.question_content,R.id.rbtn_a,R.id.rbtn_b,R.id.rbtn_c,R.id.rbtn_d});

 

Adapters are equivalent to controllers in the MVC pattern.