android – 无法取消选中动态广播组中已检查的单选按钮

private void radiotype() {
    count = //changed every time.
    LinearLayout llques = (LinearLayout) mview.findViewById(R.id.llrbgRBD);
    RadioGroup group = new RadioGroup(context);
    group.setOrientation(RadioGroup.VERTICAL);
    final RadioButton[] rb = new RadioButton[count];
    List<String[]> ans = getAnswerList.getAns();

    for (int j = 0; j < count; j++) {

        rb[j] = new RadioButton(context);
        rb[j].setVisibility(View.VISIBLE);
        rb[j].setText("`enter code here`hi");
        String a = rb[j].getText().toString();`enter code here`
        Log.e("getAnswerList===a","getAnswerList===>a" + a);
        Log.e("getAnswerList","getAnswerList===>" + ans.get(indeX)[0]);
        if (a.equalsIgnoreCase(ans.get(indeX)[0])) {
            rb[j].setchecked(true);
        }
        rb[j].setTextColor(Color.bLACK);
        rb[j].setButtonDrawable(R.drawable.custom_radio_button);
        group.addView(rb[j]);
    }
    llques.removeAllViews();
    llques.addView(group);
    group.setOncheckedchangelistener(new Oncheckedchangelistener() {
        public void oncheckedChanged(RadioGroup group,int checkedId) {
            // checkedId is the RadioButton SELEcted
            //int c = count;
            for(int i=0;i<count;i++){
                rb[i].setchecked(false);
            }
            //
            Log.v("id",""+checkedId);
            for (int i = 0; i < count; i++) {
                if (rb[i].getId() == checkedId){
                    rb[i].setchecked(true);
                } 
            }
        }
    });