DemoActivityInterface.kt

class DemoActivity : AppCompatActivity(), AdapterOnClick {
  
  override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_demo)
      //create our adapter here and passing in our class
      var demoAdapter = DemoAdapter(this)
      
      //other layout manager binding
  }
  //Function to be implemented for adapter click interface
  override fun onClick(item:Any) {
     //do things related to activity
   }
}