Thanks Amy,
I checked setup document and found out AdMob in Google Play requires runtime of Android 2.3 or later.
And standalone version requires a run-time of Android 1.5
or later.
What a Terrible Failure, AdMob requires API level 8 for logging functionality.
AdMob does not requires Google Play store application.
To verify that Google Play services is available on a device, GooglePlayServicesUtil may be used for.
If you remove dependency of latest api level from GooglePlayServicesUtil, AdMob sdk can fallback to standalone implementation that runs on 1.5 or later.
I can't believe Google have no way to change this.
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nagamatu
2014年5月16日金曜日 6時09分24秒 UTC+9 Amy Quispe (AdMob SDK Team):