Android 遍历当前活动当中的所有组件

//遍历界面上的控件 fubin.pan
        LinearLayout sLinerLayout = (LinearLayout)findViewById(R.id.layout_scr);
        for (int i = 0; i < sLinerLayout.getChildCount(); i++) {
            View v=sLinerLayout.getChildAt(i);
            if ( v instanceof RadioGroup){
                RadioGroup mRadioGroup = (RadioGroup)sLinerLayout.getChildAt(i);
                //根据ID获取RadioButton的实例
                RadioButton rb = (RadioButton)questionitemlist2.this.findViewById(mRadioGroup.getCheckedRadioButtonId());
                if (rb.getTag(R.id.tag_toend).toString().equals(""))//判断ToEnd监听
                {

                }else if(rb.getTag(R.id.tag_tonext).toString().equals(""))//判断ToNext监听
                {

                }
            }

        }