No reference documentation in Android Studio : <p>A new problem just popped up yesterday. When I hover over a method or press Ctrl-Q, I used to get documentation info for that particular method.</p>

<p>But now I just get (pressing Ctrl-Q on <code>SharedPreferences.getLong()</code>):</p>

<pre><code>Following external urls were checked:
            http://developer.android.com/reference/android/content/SharedPreferences.html#getLong-java.lang.String-long-
            http://developer.android.com/reference/android/content/SharedPreferences.html#getLong(java.lang.String, long) 

    The documentation for this element is not found. Please add all the needed paths to API docs in Project Settings.
        android.content.SharedPreferences
        public abstract long getLong(String s, long l)
</code></pre>

<p>I googled a lot, but couldn't find an answer.
Which paths do I need to add and where?</p>
