AdMob ads not displaying

[campedu]

Hello sir

I used AdMob Plugin as per documentation in app,

and also used below code line in a webpage of my site based on wordpress in footer section.

<script> window.AdMob.showBanner(); </script> BUT ads not displaying in android app.

I used TEST IDs as well as production IDs of approved admob account.
Please let me help where is problem in my code lines.

Thanks.

[mgks]

This is likely a timing issue. The Android app injects the window.AdMob object into the page once the page has fully finished loading (onPageFinished).

However, your WordPress footer script is likely executing while the page is still loading. At that exact moment, the window.AdMob object doesn't exist yet, so the call fails silently.

Possible Fix:
You need to check if the AdMob object is ready before calling it. Please replace your footer script with this robust version:

<script>
function showAdWhenReady() {
    // Check if the Smart WebView AdMob object exists
    if (typeof window.AdMob !== 'undefined') {
        console.log("AdMob found, showing banner.");
        window.AdMob.showBanner();
    } else {
        // Not ready yet, check again in 500ms
        console.log("AdMob not ready, waiting...");
        setTimeout(showAdWhenReady, 500);
    }
}

// Start the check
document.addEventListener("DOMContentLoaded", function() {
    showAdWhenReady();
});
</script>

Also, please double-check these two common oversights:

1. Enable the Plugin: Open your app/src/main/assets/swv.properties file and ensure AdMobPlugin is in the list:

   plugins.enabled=...,AdMobPlugin,...

2. Configure IDs in Java: Remember that you cannot pass Ad Unit IDs from the web. You must set your Ad Unit IDs inside the Android project.
   • Go to app/src/main/java/mgks/os/swv/Playground.java.
   • Update the IDs in the configurePlugins method:

     runPluginAction("AdMobPlugin", plugin -> {
         Map<String, Object> config = SWVContext.getPluginManager().getPluginConfig("AdMobPlugin");
         if (config != null) {
             config.put("bannerAdUnitId", "ca-app-pub-YOUR_ID/YOUR_ID");
             // ...
         }
     });

I'm going to add this example in documentation also incase anybody else goes through the same.

Let me know if this resolves the issue, if not, do share your package ID filtered console logs.

[campedu]

Hello
Yes, You were right. It was timing issue of loading script.

with the help of above java script code the problem of not displaying Ads is solved.

It is working properly on every page load in wordpress site. I used app with TEST IDs and it is working.

BUT there is some issue in PRODUCTION mode.
I have uploaded an app created with REAL IDs of AdMob Account which used in Playground.java and AdMobPlugin.java files.

and tried to check in another android phone other than TEST phone. but there is NO ADS in app.

if you can solve, it is very great thing for users who uses real ads in their applications.
Thanks.

[mgks]

If test ads are working, it confirms that the Smart WebView code, your plugin integration, and your JavaScript logic are all functioning perfectly. The app is successfully requesting ads and displaying what it receives.

When production ads fail to show despite test ads working, the issue is almost never with the code. It is usually on the AdMob side. I searched though internet what might be the causes:

• New Ad Unit Delay: If you just created the Real Ad IDs, it can take 24-48 hours (sometimes longer) for Google to start serving real ads to them.
• Payment/Account Verification: If your AdMob account is new, you must verify your payment details (PIN verification) and address. AdMob will not serve real ads until the account is fully verified.
• App-ads.txt: Ensure you have set up your app-ads.txt file on your website correctly. If this is missing or incorrect, ad serving will be blocked.
• No Fill (Error 3): This is the most common. Google tries to match an ad to the user. If the app is new and has low traffic, or if the advertiser inventory is low for that specific user profile, Google returns "No Fill" (no ad available).

How to debug this:
Connect your "Production" phone to your computer and look at Android Studio Logcat. Filter for the tag Ads. You will see a failure message with a code:

• Error Code 0 (Internal Error): Something happened internally; usually a retry fixes it.
• Error Code 1 (Invalid Request): Check your App ID and Ad Unit IDs again.
• Error Code 3 (No Fill): This is the most likely cause. Your code is correct, but Google simply had no ad to return. This usually resolves itself as your app gets more traffic.

In any case though do not change your code. If test ads work, your app is fine. Focus on your AdMob console setup and give it 2-3 days for the servers to activate your inventory (this happened with me also, so don't worry, if all is good and done, real ads will show up eventually).

[mgks]

@campedu how's it going now? you got it working?