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Android Question textwriter supported encodings - Solved
- Thread starter padvou
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Extract from chapter 14.10.6 Text encoding in the Beginner's Guide:
Android can use following character sets:
- UTF-8 default character-set
- UTF -16
- UTF - 16 BE
- UTF - LE
- US-ASCII ASCII character set
- ISO-8859-1 almost equivalent to the ANSI character-set
- Windows-1251 cyrillic characters
- Windows-1252 latin alphabet
Example:
tr.initialize2(someoutputstream, "Windows-1252")
Android can use following character sets:
- UTF-8 default character-set
- UTF -16
- UTF - 16 BE
- UTF - LE
- US-ASCII ASCII character set
- ISO-8859-1 almost equivalent to the ANSI character-set
- Windows-1251 cyrillic characters
- Windows-1252 latin alphabet
Example:
tr.initialize2(someoutputstream, "Windows-1252")
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Could this be the answer to my question?
If yes, then why do I get this exception?
If yes, then why do I get this exception?
B4X:
java.nio.charset.UnsupportedCharsetException: x-IBM737
at java.nio.charset.Charset.forName(Charset.java:303)
at anywheresoftware.b4a.objects.streams.File$TextWriterWrapper.Initialize2(File.java:482)
at bt.spp.printing.main._printer_connected(main.java:504)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:187)
at anywheresoftware.b4a.BA$3.run(BA.java:332)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5365)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)
java.nio.charset.UnsupportedCharsetException: x-IBM737
Last edited:
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Probably not.
The ones I posted are the ones I knew of.
In the Android documentaion the list is even smaller, but it specifies the garantied Charsets.
I Googled a bit and found this site List of Supported Character Encodings in Java.
Then I looked at the Android documentaion and wrote this code to get the avalable Charsets:
B4X:
Sub GetAvalableCharsets
Dim jo As JavaObject
Dim CharSets As Map
jo.InitializeStatic("java.nio.charset.Charset")
Dim jo1 As JavaObject
jo1.InitializeStatic("java.util.SortedMap")
jo1 = jo.RunMethod("availableCharsets", Null)
Dim size As Int
size = jo1.RunMethod("size", Null)
Dim jo2 As JavaObject
jo2.InitializeStatic("java.util.Set")
jo2 = jo1.RunMethod("keySet", Null)
Dim obj(size) As Object
obj = jo2.RunMethod("toArray", Null)
For i = 0 To size - 1
Log(obj(i))
Next
End Sub
Last edited:
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Great code!
So, what If I wanted to add a charset?
What does it depend on? The device? Java version?
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I started using this:
It prints everything I want to print, provided I send extended characters like this:
However, I cannot locate the € (Euro) sign...
B4X:
printer.Initialize2(cmp20.OutputStream,"x-JavaUnicode")
B4X:
Case t.CharAt(i)="Π"
Text2Return=Text2Return& Chr(143)However, I cannot locate the € (Euro) sign...
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Solved changing encoding just when the euro sign is needed and then back to Greek for the rest characters.
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