我刚写了一个类似的实现在这里：https://github.com/makeramen/android-segmentedradiobutton

I just wrote a similar implementation here: https://github.com/makeramen/android-segmentedradiobutton

它覆盖，而不是单选按钮RadioGroup中并不会覆盖的OnDraw方法，以便XML的造型仍然有效。

It overrides RadioGroup instead of RadioButton and doesn't override the onDraw method so XML styling still works.