Animators may only be run on Looper threads

[ales]

Hi,
I am facing weird error meessage in Android 5.0.1 - "Animators may only be run on Looper threads". The same code works fine on Android 4, but on Android 5 it raises an mentioned exception.

There is custom checkbox tweak:

object CheckBoxTweaks {
 type W = CheckBox

 def checked(value: Boolean) = Tweak[W](_.setChecked(value))
}

and I use the "checked" tweak in MyActivity#onCreateView:

override def onCreateView( inflater: LayoutInflater, container: ViewGroup, savedInstanceState: Bundle ) = {
 val lay = l[ScrollView](
 l[VerticalLinearLayout](
 ...
 w[CheckBox] <~ text( "Finished" ) <~ matchWidth <~ wire( finishedCheckBox ) <~ checked( aTask.state == Finished ) <~ On.click {
 ...
 }
 } )
 )
 )
 getUi( lay )
}

The error is raised on the getUi(lay) line. What could be the problem, I think that the layout is run in the UI thread, isnt't it? Or is the Looper thread different from UI thread mentioned in the Macroid documentation?

Thank you for any hint.
Ales