Android Question java.net.IDN. [Solved]

trepdas

Active Member
Licensed User
Longtime User
Hi Erel and good people,

I am trying to use erel's code to convert text to punycode and vice verse , using the internal lib IDN,

B4X: 
Sub ToACE (s As String) As String
    Dim jo As JavaObject
    jo.InitializeStatic("java.net.IDN")
    Return jo.RunMethod("toASCII", Array(s))
End Sub

Sub FromACE (s As String) As String
    Dim jo As JavaObject
    jo.InitializeStatic("java.net.IDN")
    Return jo.RunMethod("toUnicode", Array(s))
End Sub



but it fails if I add a number to the string.

for example,

using the converter on https://www.punycoder.com/ ,

entering text : מסמך2
will print out : xn--2-kiclao

but b4a crashes when it get that string.

how can it be fixed ?

? ? ? ?
here's the log :


B4X: 
Logger connected to:  samsung SM-J710F
--------- beginning of main


** Activity (main) Pause, UserClosed = true **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
user id : LX13E124H6
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
Url Exists.
Internet Connection OK!
Error occurred on line: 615 (Main)
java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:131)
    at teletag.b4a.main._toace(main.java:1654)
    at teletag.b4a.main._createidn(main.java:1349)
    at teletag.b4a.main._goteletag(main.java:1507)
    at teletag.b4a.main._btngo_click(main.java:1443)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:197)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:193)
    at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
    at android.view.View.performClick(View.java:6935)
    at android.widget.TextView.performClick(TextView.java:12752)
    at android.view.View$PerformClick.run(View.java:26211)
    at android.os.Handler.handleCallback(Handler.java:790)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:7000)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)
Caused by: java.lang.IllegalArgumentException: Invalid input to toASCII: מסמך1
    at java.net.IDN.toASCII(IDN.java:112)
    at java.net.IDN.toASCII(IDN.java:134)
    ... 25 more
Caused by: The input does not conform to the rules for BiDi code points.. line:  0. preContext:  . postContext: ך1
    at android.icu.text.StringPrep.prepare(StringPrep.java:556)
    at android.icu.impl.IDNA2003.convertToASCII(IDNA2003.java:180)
    at android.icu.impl.IDNA2003.convertIDNToASCII(IDNA2003.java:277)
    at android.icu.text.IDNA.convertIDNToASCII(IDNA.java:654)
    at java.net.IDN.toASCII(IDN.java:110)
    ... 26 more
** Activity (main) Pause, UserClosed = true **
** Service (starter) Destroy (ignored)**
** Service (httputils2service) Destroy **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
user id : LX13E124H6
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
Url Exists.
Internet Connection OK!
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
user id : LX13E124H6
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
Url Exists.
Internet Connection OK!
Error occurred on line: 678 (Main)
java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:131)
    at teletag.b4a.main._toace(main.java:1654)
    at teletag.b4a.main._createidn(main.java:1349)
    at teletag.b4a.main._goteletag(main.java:1507)
    at teletag.b4a.main._btngo_click(main.java:1443)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:197)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:193)
    at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
    at android.view.View.performClick(View.java:6935)
    at android.widget.TextView.performClick(TextView.java:12752)
    at android.view.View$PerformClick.run(View.java:26211)
    at android.os.Handler.handleCallback(Handler.java:790)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:7000)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)
Caused by: java.lang.IllegalArgumentException: Invalid input to toASCII: מסמך2
    at java.net.IDN.toASCII(IDN.java:112)
    at java.net.IDN.toASCII(IDN.java:134)
    ... 25 more
Caused by: The input does not conform to the rules for BiDi code points.. line:  0. preContext:  . postContext: ך2
    at android.icu.text.StringPrep.prepare(StringPrep.java:556)
    at android.icu.impl.IDNA2003.convertToASCII(IDNA2003.java:180)
    at android.icu.impl.IDNA2003.convertIDNToASCII(IDNA2003.java:277)
    at android.icu.text.IDNA.convertIDNToASCII(IDNA.java:654)
    at java.net.IDN.toASCII(IDN.java:110)
    ... 26 more
 
Last edited:
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OliverA

Expert
Licensed User
Longtime User
Looks like GNU's implementation of IDN/Punycode works and can be used with Android. The library can be found here: https://ftp.gnu.org/gnu/libidn/ . The latest version seems to be libidn-1.33.jar. Download that file and place it into your Additional Libraries folder for B4A. Use the #AdditionalJar directive to let B4A know about the additional jar to be used. The library can be accessed via JavaObject. I'm attaching a small demo.
 

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