xml的形势如下：
<tabhost>
<linearlayout vertival>
<framlayout weight=1/>
<tabwidget gone/>
<framlayout>
<radiogroup>
<radiobutton/>
<radiobutton/>
<radiobutton/>
<radiobutton/>
</radiogroup>
<textview/>
<textview/>
<textview/>
<textview/>
</framlayout>
</linearlayout>
</tabhost>