Android Question Printing Greek characters on a POS printer

[thanos]

Hello.
I try to print to a thermal pos printer with opening its port (9100) with a socket and send raw text.
Everything is okay with the latin characters.
When I print Greek characters i took bad results.
Instead of the correct characters i took something like ╢│▓╩ etc.
I tried to convert to ISO-8859-1 (which is not totally right because the greek codepage is ISO-8859-7)

Dim arrBytes() As Byte  
Dim sText        As String

sText     = "Ημερομηνία"
'- aStream.Write(sText.GetBytes("UTF8"))
arrBytes = sText.GetBytes("ISO-8859-1")
aStream.Write(arrBytes)

but i took almost same results (different characters but bad printing).

I send a question to company support, but no answer...
The client told that with his windows mobile application this printer is able to print greek characters.
For the record the printer is a Custom Kube.
Regards.

 

[Erel]

All that I can say is that your code is correct. It will send the string with the specified encoding.

Maybe the encoding is not correct.

 

[thanos]

All that I can say is that your code is correct. It will send the string with the specified encoding.

Maybe the encoding is not correct.

@Erel
Thanks for the response.
The right encoding for Greek is ISO-8859-7 but i am not wrong this is not supported by Android.
In any case is there a way to convert the strings into an very very old encoding like IBM737 to try?
Regards

 

[Erel]

The right encoding for Greek is ISO-8859-7 but i am not wrong this is not supported by Android.

Try it with different charsets. It will throw an error if the charset is not supported.

 

[thanos]

Try it with different charsets. It will throw an error if the charset is not supported.

@Erel
Thanks again.
As i saw the company gives an sdk for Android which is a jar file. Can i use it inside B4A without the necessary xml file?
Regards

 

[Erel]

You will need to create a wrapper or access it with JavaObject and #AdditionalJar.

 

[thanos]

You will need to create a wrapper or access it with JavaObject and #AdditionalJar.

How can i create this wrapper?
And based on your expertise, which way you suggest me?
The wrapper's way or the using the JavaObject (for code readbility, speed etc.)?
Regards

 

[Erel]

See the tutorials here: https://www.b4x.com/android/forum/forums/libraries-developers-questions.32/

The performance is the same. If the library is simple enough, and you never created a wrapper before then it will be simpler to use JavaObject.

Accesing third party Jar with #Additionaljar and JavaObject