Android Question change/delete html code in Webwiew

Erel said:

You can inject JavaScript with WebViewExtra that hides or removes the element.

http://www.w3schools.com/js/js_htmldom_nodes.asp

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Tayfur said:

how is delete with out js in webview

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warwound said:

That's not possible.
The WebView can load an HTML document.
If you have control over the HTML document then you can obviously make changes to the HTML document.
Otherwise your only option is to load the document and then manipulate it using javascript.

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Sub Process_Globals

End Sub

Sub Globals
   Dim webView1 As WebView
   webView1.Initialize("webView1")
   Dim webViewExtras1 As WebViewExtras
   webViewExtras1.addJavascriptInterface(webView1,"b4a")
End Sub

Sub Activity_Create(FirstTime As Boolean)
   Activity.AddView(webView1,0,0,100%x,100%y)
   webView1.LoadUrl("http://alumnihighschool.net/scriptures/hymns/1.htm")
   webViewExtras1.addJavascriptInterface(webView1,"B4A")
End Sub

Sub Activity_Resume

End Sub

Sub webView1_OverrideUrl (Url As String) As Boolean
   ProgressDialogShow("Loading...")
End Sub

Sub webView1_PageFinished (Url As String)
   ProgressDialogShow("Loading...")
   webViewExtras1.executeJavascript(webView1,"B4A.CallSub('processHTML',true, document.documentElement.outerHTML)")
End Sub

Sub processHTML(html As String)
   If html.IndexOf("iframe")>-1 Then
      Dim a As Int
      Dim b As Int
      Do While html.IndexOf("iframe") <> -1
         a = html.IndexOf("<iframe")
         b = html.IndexOf2("</iframe>",a)
         html = html.Replace(html.SubString2(a,b+9),"")
      Loop
      If html.IndexOf("<br><br><br><br>") > -1 Then
         a = html.IndexOf("<br><br><br><br>")
         b = html.IndexOf2("</body>",a)
         html = html.Replace(html.SubString2(a,b),"")
      End If
      webView1.LoadHtml(html)
   End If
   ProgressDialogHide
End Sub

Tayfur said:

I serached in forum.
I found some codes

is it good idea for you?

https://www.b4x.com/android/forum/threads/how-to-b-page-element-in-webview.14139/#post-82734

B4X:

Sub Process_Globals

End Sub

Sub Globals
   Dim webView1 As WebView
   webView1.Initialize("webView1")
   Dim webViewExtras1 As WebViewExtras
   webViewExtras1.addJavascriptInterface(webView1,"b4a")
End Sub

Sub Activity_Create(FirstTime As Boolean)
   Activity.AddView(webView1,0,0,100%x,100%y)
   webView1.LoadUrl("http://alumnihighschool.net/scriptures/hymns/1.htm")
   webViewExtras1.addJavascriptInterface(webView1,"B4A")
End Sub

Sub Activity_Resume

End Sub

Sub webView1_OverrideUrl (Url As String) As Boolean
   ProgressDialogShow("Loading...")
End Sub

Sub webView1_PageFinished (Url As String)
   ProgressDialogShow("Loading...")
   webViewExtras1.executeJavascript(webView1,"B4A.CallSub('processHTML',true, document.documentElement.outerHTML)")
End Sub

Sub processHTML(html As String)
   If html.IndexOf("iframe")>-1 Then
      Dim a As Int
      Dim b As Int
      Do While html.IndexOf("iframe") <> -1
         a = html.IndexOf("<iframe")
         b = html.IndexOf2("</iframe>",a)
         html = html.Replace(html.SubString2(a,b+9),"")
      Loop
      If html.IndexOf("<br><br><br><br>") > -1 Then
         a = html.IndexOf("<br><br><br><br>")
         b = html.IndexOf2("</body>",a)
         html = html.Replace(html.SubString2(a,b),"")
      End If
      webView1.LoadHtml(html)
   End If
   ProgressDialogHide
End Sub

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