Android Question WebviewExtras2 AddJavascriptInterface Not working But working to WebviewExtras

AlfaizDev · Mar 10, 2022

helo
WebviewExtras2 AddJavascriptInterface Not working But working to WebviewExtras
But I want it to work on WebviewExtras2 because I need to use sslerrorhandler
To get rid of the problem of protection gap when you lift the application on Google Play

https://www.b4x.com/android/forum/threads/flingablewebview.33406/post-401596

drgottjr · Mar 10, 2022

both the javascriptinterface and executejavascript work with webviewextras2. what are you doing to make them not work? don't describe what you're doing, show code.

AlfaizDev · Mar 11, 2022

The code is big, and I've shortened it.
And he mentioned what was required of him.

B4X:

Dim WebView1 As FlingableWebView
 Private myInterface As WebViewExtras
 
    Private Sub B4XPage_Created (Root1 As B4XView)
    myInterface.Initialize(WebView1)
    End Sub
 
Sub WebView1LoadHtml
    WebView1.LoadHtml("<html><body>Hello world!</body></html>")
    myInterface.AddJavascriptInterface(WebView1,"B4A")

End Sub

Private Sub BShare_Click
    Dim jsStatement As String = "B4A.CallSub('processHTMLShare', true, document.documentElement.innerText)"
    myInterface.executeJavascript( jsStatement)
End Sub

Sub processHTMLShare(html As String)
    Dim in As Intent
    in.Initialize(in.ACTION_SEND, "")
    in.PutExtra("android.intent.extra.TEXT",  html   )
    in.SetType("text/plain")
    in.WrapAsIntentChooser("Share")
    StartActivity(in)
End Sub

drgottjr · Mar 11, 2022

you say webviewextras2 javascriptinterface does not work.
attached find example showing that it does. it uses
some of your code.

1) i don't know what flingable webview is. (see edit below)
2) i don't use b4xpages

my example runs on my android 12 device, sdk30. you'll have
to figure out the differences between your code and mine.

i am only responding to your statement that javascriptinterface
with webviewextras2 does not work. i have nothing to say about
the rest of your code. sorry.

-------------------------------------------------------------------------------------------
edit: i downloaded flingablewebview library and substituted it for our core webview. seemed to work ok.

as for ssl, i'm not seeing it mentioned in the code you posted...

AlfaizDev · Mar 12, 2022

Thank you it now
The problem was here

B4X:

  myInterface.AddJavascriptInterface(WebView1,"B4A")

And the right code, as you mentioned.

B4X:

myInterface.AddJavascriptInterface( DefaultJavascriptInterface1, "B4A")

Thank you

Android Question WebviewExtras2 AddJavascriptInterface Not working But working to WebviewExtras

AlfaizDev

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drgottjr

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AlfaizDev

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drgottjr

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AlfaizDev

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