code: public byte[] getFingerprintFromFile(String fingerprintFile) {
          byte[] fingerprint = null;
          try {
              InputStream fis = new FileInputStream(fingerprintFile);
              fingerprint = getFingerprintFromInputStream(fis);
              fis.close();
          } catch (IOException e) {
              e.printStackTrace();
          }
          return fingerprint;
      }
docs: Get bytes from fingerprint file
  
  @param fingerprintFile	fingerprint filename
  @return fingerprint in bytes