Unity应用集成Heyzap广告遇阻：获取广告返回NO_FILL错误

Hey there, let's work through this NO_FILL problem you're facing with Heyzap ads in your Unity project. I've run into similar headaches before, so here are the key checks and fixes to try out:

1. Verify Ad Network Credentials & Dashboard Setup #

• Double-check that all API keys, app IDs, and platform-specific credentials (for Heyzap and Cross Promo) are correctly entered both in the Heyzap dashboard and your Unity project's Heyzap settings. Even a single typo can break ad requests.
• Confirm your app is properly registered and approved on each ad network's backend. Some platforms won't serve ads (even test ones) until your app is marked as live or approved for testing.
• Recheck the Heyzap mediation suite settings—ensure every ad type (interstitial, banner, etc.) you're trying to use is enabled for both Heyzap and Cross Promo networks.

2. Enable Test Mode & Test Devices #

• Force test mode to rule out live inventory issues. Add this line before initializing Heyzap:

  HeyzapAds.SetTestMode(true);
  

• For third-party networks integrated via Heyzap, make sure you've added your test device ID to their respective dashboards. Many platforms restrict live ads for unregistered test devices, leading to NO_FILL.

3. Fix Initialization Timing & Order #

• Don't request ads immediately after launching the app. Wait for Heyzap's initialization success callback before fetching ads:

  HeyzapAds.OnInitializeSuccess += () => {
      // Safe to request ads now
      HeyzapInterstitialAd.Fetch();
  };
  HeyzapAds.Start("YOUR_HEYZAP_APP_ID", HeyzapAds.FLAG_DISABLE_AUTOMATIC_FETCH);
  

• Avoid calling ad requests in Awake()—use Start() or add a short delay to give the SDK time to fully initialize.

4. Cross Promo-Specific Checks #

• Ensure you have active, approved apps set up in your Heyzap Cross Promo dashboard. If there are no apps to promote, Cross Promo will always return NO_FILL.
• Check Cross Promo targeting settings (region, device type, etc.) to make sure your test device meets the criteria.

5. Dig Into Logs & Network Connectivity #

• Filter Unity's Console for Heyzap-related logs. Look for detailed error messages (e.g., a specific network failing to initialize, or a server connection error) that might explain the NO_FILL.
• Confirm your test device has a stable internet connection. Corporate firewalls or regional restrictions can block ad network servers, leading to failed requests.

6. Update SDKs & Dependencies #

• Make sure you're using the latest version of the Heyzap Unity plugin. Old versions often have compatibility bugs with newer Unity versions or ad network SDKs.
• Verify that all third-party ad network SDKs integrated via Heyzap are compatible with the Heyzap plugin version you're using. Mismatched versions can cause silent failures.

内容的提问来源于stack exchange，提问作者sjmcmullan