Google提供了Google广告的更新，因此，如果您在gradle中更新Admob库，则需要将其添加到清单中.

Google gave update for the Google ads so if you update your Admob library in gradle then you need to add this in your manifest.

<manifest>
   <application>
      <!-- TODO: Replace with your real AdMob app ID -->
      <meta-data
          android:name="com.google.android.gms.ads.APPLICATION_ID"
          android:value="ca-app-pub-################~##########"/>
  </application>
</manifest>