title: Set contentInset and contentOffset in React Native's ScrollView
body: <p>I am trying to make my content start 100 px from the top in React Native. I have tried with</p>
  
  <pre><code>const OFFSET = 100
  const ScrollViewTest = (props) =&gt; (
    &lt;ScrollView
      contentInset={{ top: OFFSET }}
      contentOffset={{ y: OFFSET }}
    &gt;
      &lt;Text&gt;Test&lt;/Text&gt;
    &lt;/ScrollView&gt;
  )
  </code></pre>
  
  <p>But when I render the screen, it starts from 0 px, but if I scroll a little, it will scroll to 100px from the top and stay there.</p>
  
  <p>So it seems React Native doen't trigger the <code>contentOffset</code> and <code>contentInset</code> properties on initialization.</p>
  
  <p>How can I fix this? I have also tried setting <code>automaticallyAdjustContentInsets={false}</code> with no changes.</p>
  
  <p>Also, it seems these properties are for iOS only. Are there any similar properties for Android?</p>