title: ScrollView height 0 even when fill_parent
body: <p>I have a linearlayout A containing a imageview and scrollview. The scrollview contains a second linearlayout B
  The idea is to have a fixed header while the linearLayout B contains multiple views that match exactly the height of the scrollview. See it as a tabview where all tabs are after each other in a scrollview.</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout android:id="@+id/main_view"
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="#000000"
      android:orientation="vertical"&gt;
  
  &lt;ImageView android:id="@+id/logoImg"
      android:layout_width="fill_parent"
      android:gravity="center"
      android:src="@drawable/logo"
      android:layout_height="wrap_content"/&gt;
  
  &lt;ScrollView
    android:id="@+id/scrollView"
    android:layout_weight="1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"&gt; 
  
  &lt;LinearLayout android:id="@+id/scrollLinear"
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical"&gt;
  &lt;/ScrollView&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>I tried to achieve this by calling getHeight on the scrollView and then set this height to each view in the linearLayout B but getHeight always returns 0.
  Anyone an idea what's the easiest way to achieve this?</p>