Android Studio updates lead to errors

I just updated my Android studio to the current version 0.3.1. Consequently, I began to get some problems that I cannot understand. First I get this message about plugin problems when launching Android Studio. The message is as follows:

Plugin Error Problems found loading plugins: Plugin "Android Designer" was not loaded: required plugin "Android Support" is disabled. Plugin "Google Cloud Tools For Android Studio" was not loaded: required plugin "Android Support" is disabled. Disable not loaded plugins Enable Android Support Open plugin manager 

The most disturbing thing that has stopped my progress significantly at the moment is that the IDE cannot resolve XML files in the R.xxx file. For example, this line:

  setContentView(R.layout.activity_lists); 

This suggests that I am using android.R, which causes additional errors due to incompatibility. I do not know how to fix this. At another time, when this happened, further updates automatically resolved this issue.

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2 answers

In the Android SDK Manager, select the following items, and then click Install Packages:

Advanced / Google Repository

Extra / Android Support Repository

After installation, restart Android Studio

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I am trying to uninstall and reinstall Extras, but the problem is not resolved, I find a solution to fix this before reset AndoidStudio.

You need to delete this directory and restart AndroidStudio to locate the SDK location

 ~/Library/Preferences/AndroidStudio* ~/Library/Caches/AndroidStudio* ~/Library/Logs/AndroidStudio* 
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