问题描述
Google's instructions here say that if you want to use AdMob in your Android app via Google Play services you must ensure the user's device has the Google Play services APK installed. However, I'm having terrible trouble trying to get this working; and I've noticed that even if I uninstall the Google Play services updates on my phone (and don't bother checking if the services is available) my app is still perfectly able to retrieve and display ads! This is despite errors in LogCat like the following:
W/GooglePlayServicesUtil(26558): Google Play services out of date. Requires 4132500 but found 3159130
Presumably my phone still has the original version of Google Play services installed when it came out the factory. I'm just wondering whether I really need to check for Google Play services being available to use AdMob successfully. Right now it appears not. Please can someone tell me why I should bother having to make this check. Is it to handle case 4 at that Google link I gave above...?
The Google Play services APK is missing or disabled on the device, which might happen if the user explicitly uninstalls or disables it.
TL;DR - You do NOT need to check for Google Play services to use the Mobile Ads APIs.
The Google Mobile Ads offering in Google Play services is unique from most (all?) of the other libraries in Google Play services in that it CAN work without the service APK installed on the device.
If the APK installed on the device is a more recent version, the library will load the classes from the APK service and use these newer classes to request ads. Otherwise, the version of Google Play services that you compile in your app is sufficient to fetch ads.
The benefit here is that you effectively will always run against the latest version of the library when the device has the service installed. And in the case that your service version is older than the version you compiled your app against (ex: your example above) or in the case where there is no service on the device (ex: Kindle Fire), the library compiled with your app can still do the ad fetching, but you'll still have to pull in updates manually.
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