Create spinner dynamically based on REST api

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Android

REST

spinner

I have a questionnaire form where the contents are dynamic (The questions and the spinner values can be updated from the site.). I need to be able to retrieve all questions from the REST api and show it dynamically in a TextView (This part is done) and show create user input answers in the form for Spinner or EditText based on the question. I am able to create spinners but not able to show the values in it.

// Question List result
List<QuestionBankListItem> result = response.body();
//Create TextView
          final TextView[] myTextViews = new TextView[result.size()];
          for (int i = 0; i < result.size(); i++) {
            QuestionBankListItem items = result.get(i);
            // Create Labels dynamically
            final TextView rowTextView = new TextView(VisitorsSurveyActivity.this);
            rowTextView.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            rowTextView.setText(i + 1 + ". " + items.getsQuestion());
            activityVisitorsSurveyBinding.rootLayout.addView(rowTextView);
            myTextViews[i] = rowTextView;

            //answerResult = retrieveAnswerList(items.getId());

            switch (items.getiQuestionTypeID()) {
              case 1: // Single Select Spinner
                final Spinner singleSelectSpinner = new Spinner(VisitorsSurveyActivity.this);
                singleSelectSpinner.setAdapter(new ArrayAdapter<>(VisitorsSurveyActivity.this, android.R.layout.simple_list_item_1,
                    retrieveAnswerList(items.getId())));
                activityVisitorsSurveyBinding.rootLayout.addView(singleSelectSpinner);
                break;

              case 2: // Multi selectSpinner
                final Spinner multiSelectSpinner = new Spinner(VisitorsSurveyActivity.this);
                break;

              case 5: // Edit Text
                final EditText freeText = new EditText(VisitorsSurveyActivity.this);
                activityVisitorsSurveyBinding.rootLayout.addView(freeText);
                break;
            }

          } 

// Method to retrieve Answers based on question
private List<AnswerBankListItem> retrieveAnswerList(int id) {
    Call<List<AnswerBankListItem>> call = apiInterface.retrieveAnswerBankList("bearer " + sToken, id, 1);
    call.enqueue(new Callback<List<AnswerBankListItem>>() {
      @Override
      public void onResponse(@NonNull Call<List<AnswerBankListItem>> call, @NonNull Response<List<AnswerBankListItem>> response) {
        if (response.code() >= 400) {
          Snackbar.make(activityVisitorsSurveyBinding.rootLayout, "Unauthorized Request", Snackbar.LENGTH_LONG).show();
        } else if (response.code() >= 500) {
          Snackbar.make(activityVisitorsSurveyBinding.rootLayout, "Server Error", Snackbar.LENGTH_LONG).show();
        } else if (response.isSuccessful() && response.body() != null) {
          answerResult = response.body();
        }
      }

      @Override
      public void onFailure(@NonNull Call<List<AnswerBankListItem>> call, @NonNull Throwable t) {

      }
    });
    return answerResult;
  }

What I have tried:

I'm able to retrieve the questions create textviews dynamically and show it in the textview. I'm also able to retrieve the answers in the form of List objects but not able to show the result in the spinner