Android native embedded browser

Summary

• author: Micheal Hines
• kivy: >= 1.8

Python code for creating a native Android "webview" inside of a Kivy app.

Files

main.py

import kivy                                                                                     
from kivy.app import App                                                                        
from kivy.lang import Builder                                                                   
from kivy.utils import platform                                                                 
from kivy.uix.widget import Widget                                                              
from kivy.clock import Clock                                                                    
from jnius import autoclass                                                                     
from android.runnable import run_on_ui_thread                                                   
                                                                                                
WebView = autoclass('android.webkit.WebView')                                                   
WebViewClient = autoclass('android.webkit.WebViewClient')                                       
activity = autoclass('org.kivy.android.PythonActivity').mActivity                              
                                                                                                
class Wv(Widget):                                                                               
    def __init__(self, **kwargs):                                                               
        super(Wv, self).__init__(**kwargs)                                                      
        Clock.schedule_once(self.create_webview, 0)                                             
                                                                                                
    @run_on_ui_thread                                                                           
    def create_webview(self, *args):                                                            
        webview = WebView(activity)                                                             
        webview.getSettings().setJavaScriptEnabled(True)                                        
        wvc = WebViewClient();                                                                  
        webview.setWebViewClient(wvc);                                                          
        activity.setContentView(webview)                                                        
        webview.loadUrl('http://www.google.com')
                                                                                                
class ServiceApp(App):                                                                          
    def build(self):                                                                            
        return Wv()                                                                             
                                                                                                
if __name__ == '__main__':                                                                      
    ServiceApp().run()

Another example to enable viewport and zoom control:

from kivy.app import App

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


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


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

    @run_on_ui_thread
    def create_webview(self, *args):
        webview = WebView(activity)
        settings = webview.getSettings()
        settings.setJavaScriptEnabled(True)
        settings.setUseWideViewPort(True) # enables viewport html meta tags
        settings.setLoadWithOverviewMode(True) # uses viewport
        settings.setSupportZoom(True) # enables zoom
        settings.setBuiltInZoomControls(True) # enables zoom controls
        wvc = WebViewClient()
        webview.setWebViewClient(wvc)
        activity.setContentView(webview)
        webview.loadUrl('http://beta.html5test.com')

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


if __name__ == '__main__':
    ServiceApp().run()

Reference:

https://developer.android.com/guide/webapps/webview.html https://developer.android.com/reference/android/webkit/WebView.html

Example how to detach WebVew:

https://github.com/suchyDev/Kivy-Dynamic-Screens-Template/blob/master/screens/screenwebview.py