For what part? These are all known by everyone. Google doesn't release code for its services, Android is locked behind hardware by manufacturers and yes, Google is really slow in releasing Android source code when they should release it immediately.
It's not only Android from Google that is problematic to open source - the whole company is. They take open source and lock it behind internet services and hardware. Hell, they stretch GPL requirements by releasing source code months later and no one does anything.
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For what part? These are all known by everyone. Google doesn't release code for its services, Android is locked behind hardware by manufacturers and yes, Google is really slow in releasing Android source code when they should release it immediately.
It's not only Android from Google that is problematic to open source - the whole company is. They take open source and lock it behind internet services and hardware. Hell, they stretch GPL requirements by releasing source code months later and no one does anything.