I do not get "intellisense-like" auto complete when defining the attributes for any com.google.android defined tag?

Still not getting it. What did you do to reproduce it?

Well I'm not exactly sure how I did get there in the end.

I tried deleting the cache file under Recommendations\build\intermediates\dex-cache which seemed to flag up the issue but even after replacing the file again I still was unable to get the correct content assist results (I would get something about a namespace template when typing an...)

It looks like this is a bug with Android Studio and is difficult to reproduce - if it's not causing a big deal then I wouldn't worry about it too much and just hope that it gets resolved in the future. I'll see if I can find a way to reproduce my fix again tomorrow but can't promise anything!

Thanks so much for looking into this Harry James. I will look into it some more as well and update you if I find a solution.

Thanks for answering Harry James.

I do have the dependency synced and tried hitting Ctrl+Space. I have already built and run the project and it runs just fine. However if I go back to the layout file I still do not get the content assist. Very strange. I assume it has something to do with some settings I have somewhere, since the tag is coming from a gradle dependency it is not loading it into the content assist compiler.

There is a rendering problem in the Design view, not sure if that is related.

java.lang.NullPointerException
    at com.google.android.gms.plus.PlusOneDummyView$zzb.isValid(Unknown Source)
    at com.google.android.gms.plus.PlusOneDummyView.zzyF(Unknown Source)
    at com.google.android.gms.plus.PlusOneDummyView.<init>(Unknown Source)
    at com.google.android.gms.plus.internal.zzg.zza(Unknown Source)
    at com.google.android.gms.plus.PlusOneButton.zzah(Unknown Source)
    at com.google.android.gms.plus.PlusOneButton.<init>(Unknown Source)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:437)
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:154)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:93)

Hey again Pablo!

The rendering problem is normal as it's not built-in to Android Studio, and it therefore does not know how to render it.

The fact that it does not come up in the Content Assist however, is not.

Are you able to run your project with the +1 button completely fine? Is it just that the Content Assist for whatever reason does not come up with it as an option and you have to type the full tag out?

That is correct, I can use all in app features and everything works like it is supposed to. It is just the content assist does not work for any com.google prefixed tab.

It is not a big deal, it just requires more typing (or cut and pasting). I thought it was odd though since in the video they are getting the content assist.

Interesting. It should come up after a Gradle Sync so I'm not sure what's hiding it. There isn't an option in the settings to limit this (Either Content Assist is enabled or it's not).

Have you tried Invalidating Android Studio's caches and restarting?:

To do this, click on the File tab then Invalidate Caches / Restart and press Invalidate and Restart:

Let me know if that makes any difference or not.

That didn't do the trick :(

I also get no suggestions when I click Ctrl+space.

Hey again Pablo!

Do you have Power Save Mode enabled under the File menu?

Hey Harry - power save mode is off.