erro on use by code

[d3roch4]

code:
ClickNumberPickerView numberPicker = new ClickNumberPickerView(opcionais.getContext());

exception:
android.content.res.Resources$NotFoundException: Resource ID #0x0
at android.content.res.ResourcesImpl.getValue(ResourcesImpl.java:216)
at android.content.res.Resources.loadXmlResourceParser(Resources.java:2155)
at android.content.res.Resources.getLayout(Resources.java:1155)
at android.view.LayoutInflater.inflate(LayoutInflater.java:421)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.view.View.inflate(View.java:24354)
at pl.polak.clicknumberpicker.ClickNumberPickerView.initViews(ClickNumberPickerView.java:286)
at pl.polak.clicknumberpicker.ClickNumberPickerView.init(ClickNumberPickerView.java:248)
at pl.polak.clicknumberpicker.ClickNumberPickerView.(ClickNumberPickerView.java:208)
at pl.polak.clicknumberpicker.ClickNumberPickerView.(ClickNumberPickerView.java:200)
at pl.polak.clicknumberpicker.ClickNumberPickerView.(ClickNumberPickerView.java:196)
...