title: Android with Unity3d Object OnClickListener
body: <p>I am an Unity3d beginner.<br>
  I wrote a sample Unity3D project and exported it as an Android project.</p>
  
  <p><strong>How can I trigger  a click event on an Unity3D Object?</strong></p>
  
  <p>The Unity3D game has lots of objects.<br>
  When I click an object, I want to do something in my Android project.   </p>
  
  <p>Input.GetTouch is an Unity3D event.<br>
  I want use the Android OnClick event instead of that.    </p>
  
  <p>How should I do?</p>