code snippet to request test ads on "unknown" device

gistfile1.java

  public static void addThisDeviceAsTestDevice(AdRequest pAdRequest) {
          String android_id = Settings.Secure.getString(GameResources.ACTIVITY.getContentResolver(), Settings.Secure.ANDROID_ID);
          String deviceId = md5(android_id).toUpperCase();
          pAdRequest.addTestDevice(deviceId);
          boolean isTestDevice = pAdRequest.isTestDevice(GameResources.ACTIVITY);

          if (!isTestDevice) {
                  throw new RuntimeException("Failed to use test Ads :(");
          }
  }

  private static final String md5(final String s) {
          try {
                  // Create MD5 Hash
                  MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
                  digest.update(s.getBytes());
                  byte messageDigest[] = digest.digest();

                  // Create Hex String
                  StringBuffer hexString = new StringBuffer();
                  for (int i = 0; i < messageDigest.length; i++) {
                          String h = Integer.toHexString(0xFF & messageDigest[i]);
                          while (h.length() < 2)
                                  h = "0" + h;
                          hexString.append(h);
                  }
                  return hexString.toString();

          } catch (NoSuchAlgorithmException e) {
                  throw new RuntimeException(e);
          }
  }