[EDIT] better: https://www.b4x.com/android/forum/t...4j-and-from-b4j-to-webview-javascript.123547/
[solved]
finally found what works:
from WebViev click to B4J
www.b4x.com
Send data-message from WebView js function with js alert("message") to a B4J Sub.
How can I send the message without use of alert(msg) ?
working example JsBridge:
B4J JsBridge zip
B4J line 41:
Sub wv_Event(MethodName As String, Args() As Object)
...
line 46:
Dim dat As String = we1.RunMethod("getData",Null) '//here I get the String msg from the js alert(msg) in the B4J String dat
End Sub
B4J line 38:
we.RunMethod("setOnAlert", Array(e))
"setOnAlert" only responds to js alert(msg) in line: 85 in my WebView html copy
I need Alternative to receive a String from alert(String),
where do I read about others we.RunMethod like maybe "setOnMYFUNCTION" ?
all code:
How can I send the msg to B4J Sub without an alert(msg)?
[solved]
finally found what works:
from WebViev click to B4J
Making Upcalls from JavaScript to JavaFX?
Hi Everyone, I have recently been doing web development using B4j and found it extremely nice to use. I have no problems handling JS code from the server side and invoking JS from a desktop app using the WebView control (and JavaObject etc). But is it possible to invoke B4j code from JS running...
www.b4x.com
Send data-message from WebView js function with js alert("message") to a B4J Sub.
How can I send the message without use of alert(msg) ?
working example JsBridge:
B4J JsBridge zip
B4J line 41:
Sub wv_Event(MethodName As String, Args() As Object)
...
line 46:
Dim dat As String = we1.RunMethod("getData",Null) '//here I get the String msg from the js alert(msg) in the B4J String dat
End Sub
B4J line 38:
we.RunMethod("setOnAlert", Array(e))
"setOnAlert" only responds to js alert(msg) in line: 85 in my WebView html copy
I need Alternative to receive a String from alert(String),
where do I read about others we.RunMethod like maybe "setOnMYFUNCTION" ?
all code:
B4X:
''' B4J !!!
#Region Project Attributes
#MainFormWidth: 600
#MainFormHeight: 700
#End Region
' jsbridge
' http://www.mediafire.com/file/q3x4mabuxhp8981/8_B4J2jsBRIDGE.zip/file
' see https://www.b4x.com/android/forum/threads/jscriptengine.35781/
Sub Process_Globals
Private fx As JFX
Private MainForm As Form
Private wv As WebView
Private we, wvjo As JavaObject
'B4J2wv
Private TextArea1 As TextArea
Private Button1 As Button
End Sub
Sub AppStart (Form1 As Form, Args() As String)
MainForm = Form1
MainForm.RootPane.LoadLayout("B4JsBridge")
wv.LoadURL("file:///../B4X/B4JsBridge.html") 'c:/B4X/B4JsBridge.html
MainForm.Show
Wait For wv_PageFinished (Url As String)
'vw2B4J
we.InitializeNewInstance("javafx.scene.web.WebEngine",Null)
wvjo = wv
we = wvjo.RunMethod("getEngine",Null)
Dim e As Object = we.CreateEvent("javafx.event.EventHandler", "wv", False)
'how can we send msg to B4J Sub without alert() , alternative RunMethod ?
we.RunMethod("setOnAlert", Array(e))
End Sub
Sub wv_Event(MethodName As String, Args() As Object)
Log(Args(0))
Dim we1 As JavaObject = Args(0)
Log(" getSource: " & we1.RunMethod("getSource",Null))
Log(" getEventType: " & we1.RunMethod("getEventType",Null))
Dim dat As String = we1.RunMethod("getData",Null)
Log(" getData: " & dat)
TextArea1.Text = dat
End Sub
'vw2B4J end
'B4J2wv
Sub ExecuteJavaScript (wvwv As WebView, script As String) As Object
Dim jo As JavaObject = wvwv
Return jo.RunMethodJO("getEngine", Null).RunMethod("executeScript", Array(script))
End Sub
Sub Button1_Click
Dim executejs As String = TextArea1.Text
executejs = "B4J2wv(""" & executejs & """)"
Log(executejs)
ExecuteJavaScript(wv, executejs)
End Sub
'B4J2wv end
#Region B4JsBridge.html File content
#If htmlcontentWebView
<!doctype html><html lang="en-US">
<head>
<script type="text/javascript">
// B4J 'ExecuteJavaScript(WebView1, $"document.body.style.backgroundColor = '#fbd7bd'"$)
// B4J JSBridge
// B4JSub2jsWV
function B4J2wv(message){
document.getElementById("inputField").value = message;
}
// jsWV2B4JSub
function wv2B4J(){
var msg = document.getElementById("inputField").value;
alert(msg);
// how to get the message without alert
}
</script>
<style>
.tit {
color:#b69221;
font-size:300%;
margin-top:-11px;
}
body {
background-color:#fbd7bd;
}
</style></head>
<body>
<center><h1 class="tit">in WebView </h1></center>
<input id="inputField" type="text" value="">
<input onClick="wv2B4J()" type="button" value="send to B4J"/>
<!--input id="inputFieldtest" type="text" value="test">
<br><button Type="button" onClick="aaa()">Click alert</button-->
</body></html>
#End If
#End Region
#Region designer B4JsBridge.bjl
#If txttxt
WebView: wv
------
Label1:"in B4J"
TextArea1:" ", Button1: "send to WebView"
#End If
#End RegionHow can I send the msg to B4J Sub without an alert(msg)?
Last edited:
