title: Could I use just one BroadcastReceiver in my android app?
body: <p>I am kind of confused about the BroadcastReceiver.
  As title, I don't think I need another one BroadcastReceiver in my app.</p>
  
  <p>Or, is there something wrong if I use a bunch of BroadcastReceiver in my app?
  I think it  will affect my OS execute memory and performance, am I right.</p>
  
  <p>Thank you for your time and hot-heart.</p>