run_on_ui_thread crash

[FranciscoCarbonell]

error output:

AttributeError : 'Wv' object has no attribute 'f2'

runable.py

def run_on_ui_thread(f):
    '''Decorator to create automatically a :class:`Runnable` object with the
    function. The function will be delayed and call into the Activity thread.
    '''
    def f2(*args, **kwargs):
        Runnable(f)(*args, **kwargs)
    return f2

python : 3.7.1
cyrhon: 0.28.6
Kivy: 1.10

[ocobacho]

Having the same problem. Solved by not using the decorator and just using a function.

def run_ui_thread(f, *args, **kwargs):
    # args/kwargs to runnable was a bug, fixed in master
    Runnable(f)(args, kwargs)

[inclement]

Closing as insufficiently reported. Please post a full runnable example if you're still having this issue.

[shashi278]

@ocobacho
Get that create_webview out of the class instead of changing the decorator implementation and it'll work fine. Since you're using the decorator on a class method, it's searching for f2 within the class itself.

[lucasargento]

@ocobacho
Could you please explain further?
having the same issue and i didnt get your solution.
im importing the ScreenWebView class from my main.py
thanks!

[lucasargento]

Having the same problem. Solved by not using the decorator and just using a function.

def run_ui_thread(f, *args, **kwargs):
    # args/kwargs to runnable was a bug, fixed in master
    Runnable(f)(args, kwargs)

i know this issue is closed and its been a while, but could you please post your whole code on the solution? been tryng to implement it without success. thanks!

[onodnawij]

Having the same problem. Solved by not using the decorator and just using a function.

def run_ui_thread(f, *args, **kwargs):
    # args/kwargs to runnable was a bug, fixed in master
    Runnable(f)(args, kwargs)

i know this issue is closed and its been a while, but could you please post your whole code on the solution? been tryng to implement it without success. thanks!

Another solution is putting create_webview function outside the class. Because it likely trying to find the 'f2' inside Wv class.

from kivy.app import App
from jnius import autoclass
from kivy.clock import Clock
from android.runnable import run_on_ui_thread
from kivy.uix.widget import Widget

WebView = autoclass('android.webkit.WebView')
WebViewClient = autoclass('android.webkit.WebViewClient')
activity = autoclass('org.kivy.android.PythonActivity').mActivity

@run_on_ui_thread
def create_webview(*args):
	webview = WebView(activity)
	webview.getSettings().setJavaScriptEnabled(True)
	wvc = WebViewClient();
	webview.setWebViewClient(wvc);
	activity.setContentView(webview)
	webview.loadUrl('https://google.com')


class Wv(Widget):
	def __init__(self, **kwargs):
		super().__init__(**kwargs)
		self.__functionstable__ = {}
		Clock.schedule_once(create_webview, 0)
	

class ServiceApp(App):
	def build(self):
		return Wv()

[JuditNugroho]

Having the same problem. Solved by not using the decorator and just using a function.

def run_ui_thread(f, *args, **kwargs):
    # args/kwargs to runnable was a bug, fixed in master
    Runnable(f)(args, kwargs)

i know this issue is closed and its been a while, but could you please post your whole code on the solution? been tryng to implement it without success. thanks!

Another solution is putting create_webview function outside the class. Because it likely trying to find the 'f2' inside Wv class.

from kivy.app import App
from jnius import autoclass
from kivy.clock import Clock
from android.runnable import run_on_ui_thread
from kivy.uix.widget import Widget

WebView = autoclass('android.webkit.WebView')
WebViewClient = autoclass('android.webkit.WebViewClient')
activity = autoclass('org.kivy.android.PythonActivity').mActivity

@run_on_ui_thread
def create_webview(*args):
	webview = WebView(activity)
	webview.getSettings().setJavaScriptEnabled(True)
	wvc = WebViewClient();
	webview.setWebViewClient(wvc);
	activity.setContentView(webview)
	webview.loadUrl('https://google.com')


class Wv(Widget):
	def __init__(self, **kwargs):
		super().__init__(**kwargs)
		self.__functionstable__ = {}
		Clock.schedule_once(create_webview, 0)
	

class ServiceApp(App):
	def build(self):
		return Wv()

hi i can run this but i cant click back button in android. How can i detach this webview with this solution?. Thanks

[5developer]

Runnable(f)(args, kwargs)

May I see your code?

[5developer]

whithout using decorator