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Pro Up-to-date and official information
The information on Google's Android Developer Training is always up-to-date and reliable.
Pro Lessons for specific parts of Android
Google offers lessons for Android developers such as supporting different devices with different screen sizes, languages, or different platform versions.
Pro Free without advertisements
As Android Developer Training was created by Google, it is completely free without advertisements.
Con Limited game specific help
The Android Developer Training is more focused on providing help and information to Android application developers than Android game developers. Of course there are still some shared issues between applications and games such as device support that are discussed on Google's Android Developer Training.