ok, i have tried this one here:
ch = (byte)is.read();
} while (is.available() > 0);
String myErg = new String(sb.toString().getBytes(),"UTF8");
myBuffer += myErg;
all 'ä', 'ö', 'ü' and 'ß' are displayed as '??'...
i have tried UTF-8, UTF8 and ASCII.
the sender is a windows-service, sending in ASCII...
maybe someone can help me