After updating my app to compile with API level 30 (Android R, 11), I can't see AdMob test ads, and I'm receiving this error in the log:
Strict Secure Cookie policy does not allow setting a secure cookie for http://googleads.g.doubleclick.net/ for apps targeting >= R. Please either use the 'https:' scheme for this URL or omit the 'Secure' directive in the cookie value.
I'm using the last AdMob version, and I don't have "org.apache.http.legacy" references in Gradle or manifest.
This might come from the webview cookie_manager.cc.
Also this: https://www.chromestatus.com/feature/5633521622188032
Same question here: How to resolved http and Site Behavior: Navigation error in android app?
It might be temporarily broken, unless they'd set the cookie as expected.
I'm using flutter and I'm facing the same issue while implementing banner test ads. Just add the below in android manifest file under application:
android:usesCleartextTraffic="true"
and issue will be resolved.
On Android, you can add a network security config XML. For Flutter to find your XML file, you need to also add a metadata entry to the <application> tag in your manifest. This metadata entry should carry the name: io.flutter.network-policy and should contain the resource identifier of the XML.
For instance, if you put your XML configuration under res/xml/network_security_config.xml, your manifest would contain the following:
<application ...>
...
<meta-data android:name="io.flutter.network-policy"
android:resource="@xml/network_security_config"/>
</application>
If you would like to allow HTTP connections for Android debug builds,
you can add the following snippet to your $project_path\android\app\src\debug\AndroidManifest.xml:
<application android:usesCleartextTraffic="true"/>
For more: https://docs.flutter.dev/release/breaking-changes/network-policy-ios-android