OverrideUrl in B4A 1.8 crash

[elbarto]

When I click a "mailto" URL my app crashes after the Test-MessageBox (Sub-Activity with just the WebView):

Sub WebView1_OverrideURL (Url As String)
    If Url.StartsWith("mailto:") Then
      Msgbox(Url,"")
      Return True
    End If
End Sub

 

[Erel]

It doesn't crash here. You should check the unfiltered logs and post the stack trace (full error message).

With that said, stopping the execution inside the event can be a problematic operation.

 

[elbarto]

This is the error:

Shutting down VM
threadid=1: thread exiting with uncaught exception (group=0x4001d800)
FATAL EXCEPTION: main
java.lang.ClassCastException: java.lang.String
at anywheresoftware.b4a.objects.WebViewWrapper$1.shouldOverrideUrlLoading(WebViewWrapper.java:63)
at android.webkit.CallbackProxy.uiOverrideUrlLoading(CallbackProxy.java:216)
at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:323)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) at dalvik.system.NativeStart.main(Native Method)

 

[agraham]

Shouldn't OverrideUrl be declared "As Boolean"?

OverrideUrl (Url As String) As Boolean

 

[Erel]

Shouldn't OverrideUrl be declared "As Boolean"?

This is the correct answer.

The following tip will help you write the correct signatures: http://www.b4x.com/forum/basic4android-getting-started-tutorials/6546-ide-tips.html#post38342

 

[elbarto]

Sorry, copied it from a post, without thinking myself . Now it works.

Sub WebView1_OverrideURL (Url As String) As Boolean
    If Url.StartsWith("mailto:") Then
      Msgbox(Url,"")
      Return True
    End If
End Sub