Pyjnius: 'Apenas o thread original que criou uma hierarquia de visualização pode tocar suas visualizações.' erro ao tentar acessar os métodos android.view.Window

from kivy.app import App
from kivy.uix.relativelayout import RelativeLayout
from jnius import autoclass

CurrentActivity  = autoclass('org.kivy.android.PythonActivity').mActivity
view = CurrentActivity.getWindow().getDecorView()
view.setKeepScreenOn(True)

class Root(RelativeLayout):
    def __init__(self):
        super().__init__()

class SomeApp(App):
    def build(self):
        return Root()

SomeApp().run()

O mesmo erro ocorre ao usar um método diferente de android.view.Window :

CurrentActivity  = autoclass('org.kivy.android.PythonActivity').mActivity
WindowManager = autoclass('android.view.WindowManager$LayoutParams')
CurrentActivity.getWindow().addFlags(WindowManager.FLAG_KEEP_SCREEN_ON)

Kivy 1.10.1
Python 3.6

12-15 16:48:21.692 18623 18646 I python  :  Traceback (most recent call last):
12-15 16:48:21.692 18623 18646 I python  : WARNING:kivy:stderr: Traceback (most recent call last):
12-15 16:48:21.693 18623 18646 I python  :    File "main.py", line 20, in <module>
12-15 16:48:21.693 18623 18646 I python  : WARNING:kivy:stderr:   File "main.py", line 20, in <module>
12-15 16:48:21.694 18623 18646 I python  :      view.setKeepScreenOn(True)
12-15 16:48:21.694 18623 18646 I python  : WARNING:kivy:stderr:     view.setKeepScreenOn(True)
12-15 16:48:21.695 18623 18646 I python  :    File "jnius/jnius_export_class.pxi", line 734, in jnius.JavaMethod.__call__ (jnius/jnius.c:25894)
12-15 16:48:21.695 18623 18646 I python  : WARNING:kivy:stderr:   File "jnius/jnius_export_class.pxi", line 734, in jnius.JavaMethod.__call__ (jnius/jnius.c:25894)
12-15 16:48:21.697 18623 18646 I python  :    File "jnius/jnius_export_class.pxi", line 828, in jnius.JavaMethod.call_method (jnius/jnius.c:27082)
12-15 16:48:21.697 18623 18646 I python  : WARNING:kivy:stderr:   File "jnius/jnius_export_class.pxi", line 828, in jnius.JavaMethod.call_method (jnius/jnius.c:27082)
12-15 16:48:21.698 18623 18646 I python  :    File "jnius/jnius_utils.pxi", line 93, in jnius.check_exception (jnius/jnius.c:4012)
12-15 16:48:21.698 18623 18646 I python  : WARNING:kivy:stderr:   File "jnius/jnius_utils.pxi", line 93, in jnius.check_exception (jnius/jnius.c:4012)
12-15 16:48:21.699 18623 18646 I python  :  jnius.JavaException: JVM exception occurred: Only the original thread that created a view hierarchy can touch its views.
12-15 16:48:21.699 18623 18646 I python  : WARNING:kivy:stderr: jnius.JavaException: JVM exception occurred: Only the original thread that created a view hierarchy can touch its views.
12-15 16:48:21.822 18623 18646 I python  : Python for android ended.
12-15 16:48:21.830 18623 18623 V SDL     : onWindowFocusChanged(): false
12-15 16:48:21.833 18623 18623 V PythonActivity: onPause()
12-15 16:48:21.833 18623 18623 V SDL     : onPause()
12-15 16:48:21.833 18623 18623 V SDL     : nativePause()
12-15 16:48:21.833 18623 18623 F libc    : Fatal signal 11 (SIGSEGV), code 1, fault addr 0x0 in tid 18623 (ample.myaasdqpp)