RadioGroup中RadioButton默认选中问题

	for (int i = 0; i < 3; i++) {   
 	RadioButton radioButton = new RadioButton(this);
		if(i == 0){
			radioButton.setChecked(true); 
		}     
	}

for (int i = 0; i < 8; i++) {
    RadioButton radioButton = new RadioButton(this);
    radioButton.setText(i + "");
    radioButton.setId(i);
    radioGroup.addView(radioButton, LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
}
//默认选中第一个按钮
radioGroup.check(0);

for (int j = 0; j < dicBeans.size(); j++) {
					RadioButton radioButton = new RadioButton(context);
					LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
					radioButton.setText(dicBeans.get(j).getDicName());
					radioButton.setTag(formDetail.getTableDetailID());
					radioButton.setId(j);
					rgTypeEight.addView(radioButton, params);
					if (mIntentFrom == FLAG_SHOW ) {//查看
						radioButton.setEnabled(false);
						if(dicBeans.get(j).getDicName().equals(formDetail.getuValue())){
							rgTypeEight.check(j);
						}
					} else if(mIntentFrom == FLAG_UPDATE ){//修改
						radioButton.setEnabled(true);
						if(dicBeans.get(j).getDicName().equals(formDetail.getuValue())){
							rgTypeEight.check(j);
						}
					} else {//添加
						rgTypeEight.check(0);
						radioButton.setEnabled(true);
					}
				}