title: TextInputType.numberWithOptions doesn't show comma or dot
body: <pre><code>TextInputType.numberWithOptions(decimal: true),
  </code></pre>
  
  <p>I'm using the above code as a <code>keyboardType</code> in my <code>TextFormField</code> but in some devices, the device doesn't display comma or dot. Screenshot is given below:</p>
  
  <p><a href="https://i.stack.imgur.com/k5FHS.png" rel="noreferrer"><img src="https://i.stack.imgur.com/k5FHS.png" alt="keyboard image"></a></p>
  
  <p>Thinking of using this package: <a href="https://pub.dev/packages/virtual_keyboard" rel="noreferrer">https://pub.dev/packages/virtual_keyboard</a></p>
  
  <p>Any idea on how to solve it?</p>
  
  <p>This doesn't solve my problem because in my case, it's happening on Android.
  <a href="https://stackoverflow.com/questions/55570414/flutter-textfield-with-number-keyboard-comma-is-needed-instead-of-period-only">Flutter TextField with number keyboard, comma is needed instead of period (Only iOS)</a></p>