MobileAds.registerCustomTabsSession not working

[陈义宏]

​​​I have configured the ApplicationId in the Manifest, initialized MobileAds, and used MobileAds.registerCustomTabsSession() to create a CustomTabsSession. However, it doesn't work like MobileAds.registerWebView() where AdMob mediates AdSense ads in H5 content. According to the logs, registerCustomTabsSession might not be taking effect at all. I've followed the documentation at https://developers.google.com/admob/android/browser/custom-tabs for configuration. Could you provide a demo implementation or more detailed documentation to resolve this issue?

[Mobile Ads SDK Forum Advisor]

Hi chenyihong,

Thank you for contacting the Mobile Ads SDK Support team.

I hope you have followed the implementation to optimize custom tabs. Kindly double check the Prerequisites to work the implementation as expected.  As of now since this is a beta version I can see only optimize custom tabs documentation and Google Android samples do not have this functionality yet implemented. Within your Chrome Custom Tabs implementation, modify the code in the onCustomTabsServiceConnected() callback. Replace newSession() with MobileAds.registerCustomTabsSession().

// Warm up the browser process.
customTabsClient?.warmup(0L)
// Create a new browser session using the Google Mobile Ads SDK.
customTabsSession = MobileAds.registerCustomTabsSession(
 th...@MainActivity.applicationContext,
client,
// Checks the "Digital Asset Link" to connect the postMessage channel.
ORIGIN,
// Optional parameter to receive the delegated callbacks.
customTabsCallback
 )

If this doesn't work, kindly provide the below details privately so that we can check your implementation, debug to find the root cause and may provide the solution:

• app ID & ad unit ID
• Mobile Ads SDK version being used
• Charles logs
• Sample project that reproduces the issue and has custom tabs implemented

You can provide the following details via reply privately to the author option or below link.

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Thanks,
 

Mobile Ads SDK Team

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[2025-07-01 19:11:47Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01rgsbS:ref" (ADR-00316664)

[Mobile Ads SDK Forum Advisor]

Hi,

As of now no update on this. But I will intimate you once I receive any. Meanwhile, your patience is important.

Thanks,
 

Mobile Ads SDK Team

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[2025-07-11 14:34:46Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01rgsbS:ref" (ADR-00316664)

[陈义宏]

Ok, I will wait,Thanks.

Mobile Ads SDK Forum Advisor <mobile...@forumsupport.google> 于2025年7月11日周五 22:34写道：

[郑小飞]

I will continue to follow up on this issue. Please let me know if there is any progress.

[Mobile Ads SDK Forum Advisor]

Hi,

Thank you for getting back to us.

Currently there is no update at this time. Once we receive any updates, we will intimate you. Meanwhile, your patience is important.

Thanks,
 

Mobile Ads SDK Team

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How was our support today?

               

[2025-08-29 15:51:15Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01rgsbS:ref" (ADR-00316664)