If I understand correctly, then you make a request for users, that is, a list of users comes to your VKRequest username , I suppose something similar to this:
response: [{ id: 210700286, first_name: 'Lindsey', last_name: 'Stirling', city: { id: 5331, title: 'Los Angeles' }, photo_50: 'https://pp.vk.me/...f6e/4-funfNRMwg.jpg', verified: 1 }]
Maybe your request should look like this.
final VKRequest request = VKApi.users().get(VKParameters.from(VKApiConst.FIELDS, "first_name,last_name")); request.executeWithListener(new VKRequest.VKRequestListener() { @Override public void onComplete(VKResponse response) { VKApiUserFull user = ((VKList<VKApiUserFull>)response.parsedModel).get(0); //устанавливаем имя пользователя в TextView yourTextView.setText(user.first_name); } });