title: React native how to center map on user location
body: <pre><code>&lt;MapView style={styles.map}
        showsUserLocation = {true}
  &gt;
  </code></pre>
  
  <ol>
  <li>How to center map on user location in Android?</li>
  <li>How to change this blue circle with other user location marker?</li>
  </ol>