/**
 * Implements hook_form_FORM_ID_alter().
 */
function MODULENAME_form_CONTENTTYPENAME_node_form_alter(&$form, &$form_state) {
  $form['text_field']['#states'] = array(
    'visible' => array(
      ':input[name="radio_field"]' => array('value' => 'value_of_textfield_option'),
    ),
  );

  $form['integar_field']['#states'] = array(
    'visible' => array(
      ':input[name="radio_field"]' => array('value' => 'value_of_integarfield_option'),
    ),
  );
}