What is Android r.styleable or error?

R.styleable is a custom control

After the custom control is written, you need to
Defined in Res-value-attrs.xml, such as:

1<declare-styleable name= "Slidingmenu" >2<attr name= "mode" >3<enumName= "left" value= "0"/>4<enumName= "Right" value= "1"/>5</attr>6<attr name= "Viewabove" format= "Reference"/>7<attr name= "Viewbehind" format= "Reference"/>8<attr name= "Behindoffset" format= "Dimension"/>9<attr name= "Behindwidth" format= "Dimension"/>Ten<attr name= "Behindscrollscale" format= "float"/> One<attr name= "Touchmodeabove" > A<enumName= "margin" value= "0"/> -<enumName= "fullscreen" value= "1"/> -</attr> the<attr name= "Touchmodebehind" > -<enumName= "margin" value= "0"/> -<enumName= "fullscreen" value= "1"/> -</attr> +<attr name= "shadowdrawable" format= "Reference"/> -<attr name= "Shadowwidth" format= "Dimension"/> +<attr name= "fadeenabled" format= "boolean"/> A<attr name= "Fadedegree" format= "float"/> at<attr name= "selectorenabled" format= "boolean"/> -<attr name= "selectordrawable" format= "Reference"/> -</declare-styleable>

What is Android r.styleable or error?