title: Custom picker dialog
body: <p>I'm new to Android. I have a default spinner in my app. I want to change the design of the spinner. When the spinner is clicked, picker dialog should appear on the screen, displaying scrollable list. I don't know how to implement the code to meet my requirements.</p>
  
  <p><img src="https://i.stack.imgur.com/k5xNW.png" alt="enter image description here"></p>
  
  <p>I have read these articles: <a href="http://android-developers.blogspot.com/2012/05/using-dialogfragments.html" rel="noreferrer">(1)</a> <a href="http://developer.android.com/guide/topics/ui/dialogs.html#CustomDialog" rel="noreferrer">(2)</a></p>