regex - Parsing Diagnostic Trouble Codes(DTC) data to use in Android -

i have code receives data obd-ii adapter , runs through regex can identify part contains trouble codes. it.

datarecieved = readmessage; rx.settext(datarecieved);  if((datarecieved != null) && datarecieved.matches("\\s*[a-f0-9]{2} [a-f0-9]{2} [a-f0-9]{2} [a-f0-9]{2} [a-f0-9]{2} [a-f0-9]{2}\\s*\r?\n?")) {     if(d) log.i(tag, "regex ");      datarecieved = datarecieved.replace(">", "").trim();     dtc.settext(datarecieved); 

after regex set whatever received textview in android. however, there's no text set when run it. don't know if it's regex used. it's supposed detect

> 01 00 14 53 00 00 

including or excluding prompt.

the matches() method expects regex consume whole string, if > part of the message, need account it.

pattern p = pattern.compile(">\\s*((?:[a-f0-9]{2}\\s+){5}[a-f0-9]{2})\\s*"); matcher m = p.matcher(datarecieved); if (m.matches()) {   dtc.settext(m.group(1)); } 

by creating matcher object instead of using string's matches() method, able use capturing group extract part of message you're interested in, eliminating need replace() , trim() methods.

also, \s matches linefeed , carriage-return, \r?\n? redundant.

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edit: per comment below, here's version matches 1 or more trouble codes on successive lines:

">\\s+((?:(?:[a-f0-9]{2}\\s+){5}[a-f0-9]{2}\\s*)+)" 

all lines captured in single block. captures newline @ end of last line if there one, may need trim off.