Label not being displayed in kivy screen with Navigation drawer - python-3.x

Question

Here I am trying to build a app having navigation bar.The navigation bar have OneLineListItem when I click those items the screen changes but label is not appearing.I also tried adding multiple buttons in the layout it works fine.But when I add Label it is not being displayed.
Following is the kv language code I used:-
#:import FadeTransition kivy.uix.screenmanager.FadeTransition
# Menu item in the DrawerList list.
<ItemDrawer>:
theme_text_color: "Custom"
on_release: self.parent.set_color_item(self)
IconLeftWidget:
id: icon
icon: root.icon
theme_text_color: "Custom"
text_color: root.text_color
<ContentNavigationDrawer>:
orientation: "vertical"
padding: "8dp"
spacing: "8dp"
AnchorLayout:
anchor_x: "left"
size_hint_y: None
height: avatar.height
Image:
id: avatar
size_hint: None, None
size: "56dp", "56dp"
source: "data/logo/kivy-icon-256.png"
MDLabel:
text: "Voice Cloning Tool"
font_style: "Button"
size_hint_y: None
height: self.texture_size[1]
MDLabel:
text: "MENU"
font_style: "Caption"
size_hint_y: None
height: self.texture_size[1]
ScrollView:
DrawerList:
OneLineListItem:
text:'Home'
on_release:app.root.current='home_screen'
OneLineListItem:
text:'Record Voice'
on_release:app.root.current='rec_screen'
OneLineListItem:
text:'Help'
OneLineListItem:
text:'About'
OneLineListItem:
text:'Contact Us'
ScreenManagement:
transition:FadeTransition()
HomeScreen:
RecordScreen:
AboutScreen:
ContactUSScreen:
<HomeScreen>:
name:'home_screen'
NavigationLayout:
ScreenManager:
Screen:
SliderWin
BoxLayout:
orientation: 'vertical'
MDToolbar:
title: "Explore Voice cloning Tool"
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.toggle_nav_drawer()]]
Widget:
MDNavigationDrawer:
id: nav_drawer
ContentNavigationDrawer:
id: content_drawer
<RecordScreen>:
name:'rec_screen'
NavigationLayout:
ScreenManager:
Screen:
BoxLayout:
orientation: 'vertical'
MDToolbar:
title: "Explore Voice cloning Tool"
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.toggle_nav_drawer()]]
Button:
text:'Hello World'
size_hint:0.5,0.1
pos_hint:{'x':0.5,'y':0.5}
Button:
text:'Hello World'
size_hint:0.5,0.1
pos_hint:{'x':0.5,'y':0.5}
MDNavigationDrawer:
id: nav_drawer
ContentNavigationDrawer:
id: content_drawer

Answer 1

I was being idiot here.I forgot the fact that by default the label has white color.Here my background was white too that was the reason it was not being displayed.
I changed the color of the label to some other color and it displayed.Below is the changed code:-
#:import FadeTransition kivy.uix.screenmanager.FadeTransition
# Menu item in the DrawerList list.
<ItemDrawer>:
theme_text_color: "Custom"
on_release: self.parent.set_color_item(self)
IconLeftWidget:
id: icon
icon: root.icon
theme_text_color: "Custom"
text_color: root.text_color
<ContentNavigationDrawer>:
orientation: "vertical"
padding: "8dp"
spacing: "8dp"
AnchorLayout:
anchor_x: "left"
size_hint_y: None
height: avatar.height
Image:
id: avatar
size_hint: None, None
size: "56dp", "56dp"
source: "data/logo/kivy-icon-256.png"
MDLabel:
text: "Voice Cloning Tool"
font_style: "Button"
size_hint_y: None
height: self.texture_size[1]
MDLabel:
text: "MENU"
font_style: "Caption"
size_hint_y: None
height: self.texture_size[1]
ScrollView:
DrawerList:
OneLineListItem:
text:'Home'
on_release:app.root.current='home_screen'
OneLineListItem:
text:'Record Voice'
on_release:app.root.current='rec_screen'
OneLineListItem:
text:'Help'
OneLineListItem:
text:'About'
OneLineListItem:
text:'Contact Us'
ScreenManagement:
transition:FadeTransition()
HomeScreen:
RecordScreen:
AboutScreen:
ContactUSScreen:
<HomeScreen>:
name:'home_screen'
NavigationLayout:
ScreenManager:
Screen:
SliderWin
BoxLayout:
orientation: 'vertical'
MDToolbar:
title: "Explore Voice cloning Tool"
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.toggle_nav_drawer()]]
Widget:
MDNavigationDrawer:
id: nav_drawer
ContentNavigationDrawer:
id: content_drawer
<RecordScreen>:
name:'rec_screen'
NavigationLayout:
ScreenManager:
Screen:
BoxLayout:
orientation: 'vertical'
MDToolbar:
title: "Explore Voice cloning Tool"
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.toggle_nav_drawer()]]
Label:
text:'Hello World'
size_hint:0.5,0.1
pos_hint:{'x':0.5,'y':0.5}
color:1,0,1,1
Button:
text:'Hello World'
size_hint:0.5,0.1
pos_hint:{'x':0.5,'y':0.5}
MDNavigationDrawer:
id: nav_drawer
ContentNavigationDrawer:
id: content_drawer