Android Question WebViewExtras2 version 2.20 sample codes

[Erick Kalugdan]

I can't seem to find an example on how to use the ReceivedError event of the WebViewExtras2 library.

I tried to use it to replace WebViewExtras (the old one) but I am getting a lot of errors. They seem to have different methods and ways of initializing.

Can anyone help please? An example on the following would be of great help for everyone trying to use the new WebViewExtras2 (version 2.20) library.

a. How to load a URL
b. How to check if there is error 404
c. How to execute Javascript in the WebView
d. How Javascript in the WebView can call a Sub in B4A

Thanks in advance!

 

[Erel]

Moved to the questions forum.

 

[Erick Kalugdan]

Do you have the URL of the "questions forum"?

 

[DonManfred]

https://www.b4x.com/android/forum/forums/android-questions.26/

 

[Erel]

You should go over the library thread. It will answer most or all of your questions.

https://www.b4x.com/android/forum/t...oaded-website-into-webview.11232/#post-354156

https://www.b4x.com/android/forum/threads/webviewextras.12453/#content

 

[Erick Kalugdan]

Was able to initialize, load URL, and execute a javascript in a WebView.

My remaining problem now is addJavascriptInterface doesn't seem to work with version 2.20. It's not calling the app's Sub's when I execute:

<script>
function closeApp() {
 APP.CallSub("Logout", true);
}
</script>

Here's my app code:

Sub Globals
    Dim LogonUrl As String = "file:///android_asset/test.htm"
    Dim WebView1 As WebView
    Dim WebViewExtras1 As WebViewExtras
End Sub

Sub Activity_Create(FirstTime As Boolean)
    WebView1.Initialize("WebView1")
    Activity.AddView(WebView1, 0, 0, 100%x, 100%y)
    WebView1.ZoomEnabled = False
    WebViewExtras1.Initialize(WebView1)
    WebViewExtras1.addJavascriptInterface(WebView1, "APP")
    WebView1.LoadUrl(LogonUrl)
End Sub

Sub Logout
    Activity.Finish
End Sub

 

[DonManfred]

    WebViewExtras1.addJavascriptInterface(WebView1, "APP")
    WebViewExtras1.addWebChromeClient(WebView1, "") ' <--

in my example there is one more line... Maybe this is needed!?

 

[Erick Kalugdan]

I am using WebViewExtras2 version 2.20, not WebViewExtras version 1.42

Your code works with 1.42 but in 2.20 the IDE sends an error: Unknown member: addWebChromeClient

 

[DonManfred]

you are right. works with 1.42. Does not work with 2.2

 

[An Schi]

This is just from memory and i am not at my pc, so i might be wrong.
I think in version 2 you have to use something like 'setdefaultchromeclient'.

 

[Erick Kalugdan]

1. Does the ChromeClient have anything to do with the addJavascriptInterface? I just need my javascript to be able to run Sub's in my app just like version 1.42 does with CallSub

2. I believe the ChromeClient is only used for the logs?

 

[peacemaker]

So, still no solution for working addJavascriptInterface in v.2.20 ?
It works in Android < 4.4, but still no in 4.4+

 

[eps]

This seems to work for me... I've just moved from 1.42 to 2.20... Not sure if @peacemaker can add some more info about it not working...

 

[ronell]

a. How to load a URL
b. How to check if there is error 404
c. How to execute Javascript in the WebView
d. How Javascript in the WebView can call a Sub in B4A

all issue solved?