Kivymd dropdown closes immediately after opening - drop-down-menu

Question

I am trying to add a dropdown list using kv file. I have managed to create it but when i click on it the drop down opens and closes immediately without me selecting or clicking anywhere
How do i stop this
Button:
id: btn
text: 'Press'
on_release:
if not root.state: dropdown.open(self); root.state = False
else: dropdown.dismiss(); root.state = False
size_hint: 0.2,0.05
height: '48dp'
DropDown:
id: dropdown
on_parent: self.dismiss()
on_select: btn.text = '{}'.format(args[1]); root.state = False
Button:
text: 'First Item'
size_hint_y: None
height: '48dp'
on_release: dropdown.select('First Item')
Label:
text: 'Second Item'
size_hint_y: None
height: '48dp'
Button:
text: 'Third Item'
size_hint_y: None
height: '48dp'
on_release: dropdown.select('Third Item')

Answer 1

If you're talking about MDDropDownMenu - it is working another way and accepts list of dicts for the buttons. Here's the example:
In kv file:
MDRaisedButton:
text: app.groupstrace
size_hint_x: 0.15
# here you call drop down menu:
on_release: MDDropdownMenu(items=app.groupsdict, width_mult=3, background_color=[1,0.5,0,1]).open(self)
md_bg_color: [1,0.5,0,1]
In .py file:
groupsdict = [
{
"viewclass": "MDMenuItem",
"text": "Yourtext",
# no parentheses after function name!
"callback": self.function1,
},
{
"viewclass": "MDMenuItem",
"text": "Yourtext",
# in case you want label, just don't set a callback
"callback": None,
}
# and so on
]