It should be possible to use getCompoundDrawables() and setCompoundDrawables() to rearrange the drawables around the text.
To go one step further, perhaps you could perhaps implement your own CheckBoxRight widget based on CheckBox which did that in the onDraw() method after calling super.onDraw().
A final alternative would be to build your own widget directly from TextView and just setCompoundDrawables() appropriately after maintaining an internal state from an onClick() event handler.
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