title: android- multi onClick listener in one button
body: <p>I have made a custom component like Mybutton.java
  and I have set an onclick listener in Mybutton.java.</p>
  
  <p>Now, in my new activity, I have to call a Mybutton
  and add content in onclick listener.</p>
  
  <p>However, if I use   <code>OnClickListener mClickListener = new OnClickListener(){......</code>
  it will replace the old content.
  I hope it can do the old and new listener together.</p>
  
  <p>I have searched for some information, found out i can implement this method.
  After many attempts, I'm still getting errors.</p>
  
  <p>Can anyone give me a simple example
  that i can learn to modify it?</p>