Android 自定义属性重复：../l: Error: Found item Attr/rightTextColor more than one time

Android 自定义属性重复：../l: Error: Found item Attr/rightTextColor more than one time

自定义属性时，对于不同的 属性域，采用了相同的属性名，会引发错误：
../l: Error: Found item Attr/rightTextColor more than one time

<declare-styleable name="s1"><attr name="rightTextColor"  format="color"/>
</declare-styleable><declare-styleable name="s2"><attr name="rightTextColor"  format="color"/>
</declare-styleable>

解决：
将属性定义在外部，内部只声明引用。

<attr name="rightTextColor" format="color" /><declare-styleable name="s1"><attr name="rightTextColor"/>
</declare-styleable><declare-styleable name="s2"><attr name="rightTextColor"/>
</declare-styleable>