title: Make a custom notification smaller than default size in android
body: <p>It's a while since I'm trying to make a small notification. After some researches i found that the default size is 64 dp, but is it possible to reduce this minimum size?
  I found an app that makes this very small notification:
  <a href="https://i.stack.imgur.com/7S0kT.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7S0kT.jpg" alt="https://www.dropbox.com/s/5kunskccjf0cniw/Screenshot_20171012-131214_01.jpg?dl=0"></a></p>
  
  <p>Do you know how to do something like that?
  I tried with custom notification but even if I set a different size in activity_main.xml it didn't change.</p>