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//RadioGroup监听
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        //判断点的是哪个选项
        if (checkedId == radioNv.getId())
            mGroup = 2;
        else if (checkedId == radioNan.getId())
            mGroup = 1;
        else if (checkedId == radioOther.getId())
            mGroup = 3;
    }
});