title: NPE in ChangeCurrentByOneFromLongPressCommand (on Samsung devices w/ Android 4.3)
body: <p>Using a couple <code>android.widget.NumberPicker</code> in my Android App view and I get the following message when I hold down on one of the numbers arrows:-</p>
  
  <pre><code>FATAL EXCEPTION: main 
  java.lang.NullPointerException at android.widget.NumberPicker$ChangeCurrentByOneFromLongPressCommand.run(NumberPicker.java:2245)
  at android.os.Handler.handleCallback(Handler.java:730)
  at android.os.Handler.dispatchMessage(Handler.java:92)
  at android.os.Looper.loop(Looper.java:137)
  at android.app.ActivityThread.main(ActivityThread.java:5419)
  </code></pre>
  
  <p>Anyone got any ideas on how I can stop this problem?</p>
  
  <p><strong>UPDATE:</strong> From the comments so far, it seems that this exception <strong>only happened on Samsung devices with Android 4.3</strong>.</p>