code: protected String getLogFormat() {
          final String[] formats = getResources().getStringArray(R.array.format_list);
          if (mFormat >= 0 && mFormat < formats.length) {
              return formats[mFormat];
          }
          return formats[FORMAT_DEFAULT];
      }
docs: The log format to use. Default is "time". Override to use a different format.
  Return null to prompt for format.