private static String createStartActivityCommand(String activityName) {
    String fullActivityName = Constants.TARGET_PACKAGE.concat("/").concat(activityName);

    String startActivityCommand =
        adbFullPath_
            .concat(" ")
            .concat(Constants.START_ACTIVITY_CMD)
            .concat(" ")
            .concat(fullActivityName);

    System.out.println("START" + startActivityCommand);

    return startActivityCommand;
  }
 /** Returns activity name without package (like .activities.MainActivity) */
 private static String getActivityNameWithoutPackage(String fullActivityName) {
   int packageLength = Constants.TARGET_PACKAGE.length();
   String clearName = fullActivityName.substring(packageLength);
   return clearName;
 }