Use a Webview in Kivy

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.utils import platform
from jnius import autoclass,JavaClass, java_method, MetaJavaClass
from android.runnable import run_on_ui_thread
import time
ChromeClient = autoclass("android.webkit.WebChromeClient")

from jnius import JavaClass, MetaJavaClass

class MyChromeClient(JavaClass):
    __javaclass__ = 'android/webkit/WebChromeClient'
    __metaclass__ = MetaJavaClass

class AndroidWebView(Widget):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.create_webview()

    def create_webview(self):
        # Get the required Java classes
        PythonActivity = autoclass("org.kivy.android.PythonActivity")
        WebView = autoclass("android.webkit.WebView")
        WebViewClient = autoclass("android.webkit.WebViewClient")
        LayoutParams = autoclass("android.view.ViewGroup$LayoutParams")

        # Get the current activity
        activity = PythonActivity.mActivity

        @run_on_ui_thread
        def f():
            self.webview = WebView(activity)
            self.webview.getSettings().setJavaScriptEnabled(True)
            self.webview.setWebViewClient(WebViewClient())

            # self.webview.setWebChromeClient(ChromeClient())
            # self.webview.setWebChromeClient(MyChromeClient())

            self.webview.loadUrl("https://example.com")  # Set the URL to load

            # Add the WebView to the current activity
            activity.addContentView(
                self.webview, LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
            )

        f()
        time.sleep(4)
        @run_on_ui_thread
        def f():
            print("alerting")
            self.webview.evaluateJavascript("window.location = 'https://google.fr'", None)
        f()

    def on_touch_down(self, touch):
        if self.collide_point(*touch.pos):
            return True
        return super().on_touch_down(touch)

    def on_touch_move(self, touch):
        if self.collide_point(*touch.pos):
            return True
        return super().on_touch_move(touch)

    def on_touch_up(self, touch):
        if self.collide_point(*touch.pos):
            return True
        return super().on_touch_up(touch)

class MyWebViewApp(App):
    def build(self):
        return AndroidWebView()

if __name__ == "__main__":
    MyWebViewApp().run()

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.utils import platform
from jnius import autoclass,JavaClass, java_method, MetaJavaClass
from android.runnable import run_on_ui_thread
import time
ChromeClient = autoclass("android.webkit.WebChromeClient")

from jnius import JavaClass, MetaJavaClass

class MyChromeClient(JavaClass):
    __javaclass__ = 'android/webkit/WebChromeClient'
    __metaclass__ = MetaJavaClass

class AndroidWebView(Widget):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.create_webview()

    def create_webview(self):
        # Get the required Java classes
        PythonActivity = autoclass("org.kivy.android.PythonActivity")
        WebView = autoclass("android.webkit.WebView")
        WebViewClient = autoclass("android.webkit.WebViewClient")
        LayoutParams = autoclass("android.view.ViewGroup$LayoutParams")

        # Get the current activity
        activity = PythonActivity.mActivity

        @run_on_ui_thread
        def f():
            self.webview = WebView(activity)
            self.webview.getSettings().setJavaScriptEnabled(True)
            self.webview.setWebViewClient(WebViewClient())

            # self.webview.setWebChromeClient(ChromeClient())
            # self.webview.setWebChromeClient(MyChromeClient())

            self.webview.loadUrl("https://example.com")  # Set the URL to load

            # Add the WebView to the current activity
            activity.addContentView(
                self.webview, LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
            )

        f()
        time.sleep(4)
        @run_on_ui_thread
        def f():
            print("alerting")
            self.webview.evaluateJavascript("window.location = 'https://google.fr'", None)
        f()

    def on_touch_down(self, touch):
        if self.collide_point(*touch.pos):
            return True
        return super().on_touch_down(touch)

    def on_touch_move(self, touch):
        if self.collide_point(*touch.pos):
            return True
        return super().on_touch_move(touch)

    def on_touch_up(self, touch):
        if self.collide_point(*touch.pos):
            return True
        return super().on_touch_up(touch)

class MyWebViewApp(App):
    def build(self):
        return AndroidWebView()

if __name__ == "__main__":
    MyWebViewApp().run()