title: How to create plugin for B4A
body: <p>i need to create activity for b4a,
  so i have 2 questions:
  1. is it possible to add java activity to b4a? its possible in unity, but is it possible here?
  2. if not, how do i create a library for b4a ?</p>
  
  <p>i tried find answer for that on the net, but nothing.</p>
  
  <p>for example, on unity, if i create a class in java</p>
  
  <pre><code>public class AppayableUnityAdapter extends UnityPlayerActivity
  </code></pre>
  
  <p>and this class have </p>
  
  <pre><code>protected void onCreate(Bundle savedInstanceState) 
  </code></pre>
  
  <p>and i create a jar from it and add to the project and to the manifest, it just starts with the application. so is there a way to do that with B4A?</p>