code: public static String getVersionCode(Context context) {
          if (sVersion == null) {
              try {
                  sVersion = context.getPackageManager().getPackageInfo(
                          context.getPackageName(), 0).versionName;
              } catch (PackageManager.NameNotFoundException e) {
                  // Can't find version; just leave it blank.
                  Log.e(TAG, "Error finding package " + context.getApplicationInfo().packageName);
              }
          }
          return sVersion;
      }
docs: Return the app version code.