How to call an activity from a BaseExpandableListAdapter?

I would like to call an activity from the click of a button, but it does not work because the source class is not an activity, but a BaseExpandableListAdapter, is there a way to do this?

Code:

holder.btnDetalhes.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent i = new Intent(ExpandableAdapterMenuCompleto.this, DetalhesItemContaCliente.class);  
            StartActivity(i);           
        }
    });