HarmonyOS如何获取当前app版本号和code

let bundleFlags = bundleManager.BundleFlag.GET_BUNDLE_INFO_DEFAULT; 
try { 
  bundleManager.getBundleInfoForSelf(bundleFlags).then((data) => { 
    hilog.info(0x0000, 'testTag', 'getBundleInfoForSelf successfully. Data: %{public}s', JSON.stringify(data)); 
  }).catch((err:BusinessError) => { 
    hilog.error(0x0000, 'testTag', 'getBundleInfoForSelf failed. Cause: %{public}s', err.message); 
  }); 
} catch (err) { 
  hilog.error(0x0000, 'testTag', 'getBundleInfoForSelf failed: %{public}s', err.message); 
}