title: How do you set a percent width (or flex) for a React Native Picker on Android?
body: <p>On iOS, you're able to put a <code>&lt;Picker&gt;</code> in a flex box and make the picker(s) flex the entire width of the screen.</p>
  
  <p>Using the new cross-platform <code>&lt;Picker&gt;</code> element in React Native, what's the easiest way to do this on Android?</p>
  
  <p>The Picker on Android only accepts the width element, and obviously doesn't accept percentage values. It does not scale to the width of its container.</p>