title: Configure android EditText to allow decimals and negatives
body: <p>I have an Android <code>EditText</code> that I want to have the number keyboard come up. </p>
  
  <p>If I set the android:inputType to numberSigned, I get the number keyboard and the ability to type in negatives.  However this won't let me use decimals.  If I use the numberDecimal inputType I can use decimals but not negatives. </p>
  
  <p>How do you get the number keyboard with the ability to type in decimals and negatives?</p>