title: Fail to kill process on android
body: <p>I am developing a tiny app, it might contains several activities, and in <code>MainActivity</code>, there's a button aims to kill the whole process, here's what I do in the <code>OnCLick</code>:</p>
  
  <pre><code>android.os.Process.killProcess(android.os.Process.myPid());
  MainActivity.this.finish();
  </code></pre>
  
  <p>I tested it on my phone. It did exit the activity and backed to my home page, but I long pressed the home page to check the current running process on my phone and found that it's still regarded as a running process. If I open it again, it would be just like a restarted one. Does anyone know how to solve this problem, or is it just a bug that an Android phone might have?</p>