title: Example of AIDL use
body: <p>to understand the <code>AIDL</code> in android, i want one real life example, means the at what scenario of development we need to use <code>AIDL</code>.</p>
  
  <p>by reading the Android Docs  ... It puts me in confusion and so many question, so it is hard to read whole doc for me, can anyone help me</p>
  
  <ol>
  <li><p>is it for communicating with outside the phone.</p></li>
  <li><p>or to communicating with different apps, (why we need to communicate with other apps)</p></li>
  <li><p>what kind of service they are talking in docs </p></li>
  </ol>