title: How to create switch button customize in Android
body: <p>I'm studing android programming to using switch button.</p>
  
  <p>but I can't implement switch button like O,I simbols(you can see android setting screen).</p>
  
  <p>I tried to implement to using these properites (android:thumb, android:track)</p>
  
  <p>but i can't implement simbol(O, I).</p>
  
  <p>Do you have any idea how to do it?  I really tried to find the answer but I haven't been successful.</p>
  
  <p>Thank you.</p>