how to find in d.android.com?
<p>Im new to this so much is a bit confusing now. But I see that d.android.com is a goldmine if you know how to use it and find the stuff.</p>

<p>How do I use this resource to find what Im searching for? To explain a bit how I mean. I have read a book with this code:</p>

<pre><code>&lt;LinearLayout...
...
   &lt;ImageView
      android:id="@+id/icon"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:src="@drawable/on" /&gt;
</code></pre>

<p>I wanted to see what variables (right name?, like layout_gravity) ImageView could have and its attributes (?, like center_horizontal) so I checked out:<br/>
<a href="http://d.android.com/reference/android/widget/ImageView.html" rel="nofollow">http://d.android.com/reference/android/widget/ImageView.html</a><br/>
but nowhere I could find any of the above variables. So instead I tested to check its parent LinearLayout:<br/>
<a href="http://d.android.com/reference/android/widget/LinearLayout.html" rel="nofollow">http://d.android.com/reference/android/widget/LinearLayout.html</a><br/>
But there were nothing either of above variables. There was android:gravity thats looks alike tho.</p>

<p>So how should I do to find which variables and its attributes a class (?, like imageview) 
can have?? Where/how do I find information like this??</p>
