title: how change button Icons in android?
body: <p>i wish to adjust icons in my application that i'm about to devolp. </p>
  
  <p>this is the link of the tutorial that i'm folowing . 
  "<a href="https://www.youtube.com/watch?v=lkadcYQ6SuY" rel="nofollow">https://www.youtube.com/watch?v=lkadcYQ6SuY</a>"</p>
  
  <p>this is the example given and created in the tutorial . </p>
  
  <p>now i don't have the reputation yet to post pictures to show you what i want BUT </p>
  
  <p>simple i want <strong>arrows</strong> for back and forward (custom created) <strong>instead of textbuttons</strong></p>
  
  <p>anyone who can help me ... ?</p>