Use RequestConfiguration.Builder().setTestDeviceIds(Arrays.asList("185.......E7") to get test ads on this device.
This app use firebase_admob
package for implementing Google AdMob in the app. I was getting the above statement in the logcat terminal when using the Test Ads provided in https://developers.google.com/admob/android/test-ads#enable_test_devices in my Flutter App.
If I use RequestConfiguration.Builder().setTestDeviceIds...
it gives
Undefined name 'RequestConfiguration'.