带有AsyncTask的CompoundButton

Question

我可以轻松地从onPostExecute获取responseString值。

但我还添加了 LinkedList＆lt;在doInBackground中显示答案列表的CompoundButton＆gt; 。

1-如何使用 LinkedList＆lt; CompoundButton＆gt; 与 onPostExecute ？ （比如我的responseString）？

我在下面写的代码给了我错误。是因为我没有使用它们的返回值，还是它们错了？

public final class Quiz extends Activity {
      RadioGroup rg;    
     RadioButton rb;
public  class FetchTask extends AsyncTask<Integer, Void, String>  {
 private LinkedList<CompoundButton> answers;

public FetchTask(TextView outputTxt) {
                outTxt = outputTxt;  
                } 
protected String doInBackground(Integer... uri) {
    responseString = this.qz.getCurrentQuestion().getQuestionText();
                   this.answers = new LinkedList<CompoundButton>();

                    for (final Answer ans : this.qz.getCurrentQuestion().getAnswers()) {

                         this.answers.add(rb);
                         this.answers.getLast().setText(ans.getAnswerText());
                         this.answers.getLast().setId(ans.getAnswerId());
                         this.answers.getLast().setChecked(this.userAnswers.get(ans.getAnswerId()));
                          this.answers.getLast()
                        .setOnCheckedChangeListener(new OnCheckedChangeListener() {
                            @SuppressWarnings("synthetic-access")
                            @Override
                            public void onCheckedChanged(final CompoundButton buttonView,
                                    final boolean isChecked) {
                                for (final View rb : FetchTask.this.answers)
                        {
                            ((CompoundButton) rb).setChecked(false);
                        }
                        buttonView.setChecked(isChecked);
                    }
                        });
                rg.addView(this.answers.getLast());

                    }
                    FetchTask.ll.addView(rg);

  return responseString;
   }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            outTxt.setText(result);

        }
}
}