获取Android版本号

//版本名  versionNamepublic static String getVersionName(Context context) {          return getPackageInfo(context).versionName;  }  //版本号  versionCodepublic static int getVersionCode(Context context) {          return getPackageInfo(context).versionCode;  }  private static PackageInfo getPackageInfo(Context context) {          PackageInfo pi = null;          try {      PackageManager pm = context.getPackageManager();      pi = pm.getPackageInfo(context.getPackageName(),          PackageManager.GET_CONFIGURATIONS);  return pi;      } catch (Exception e) {          e.printStackTrace();      }      return pi;}