Scala features being used on Android

MyActivity.scala

package com.example.android_scala

import android.app.Activity
import android.os.Bundle
import android.view.View
import android.view.View.OnClickListener
import android.widget.{Button, Toast}
import com.example.android_scala.MyActivity._

class MyActivity extends Activity {
  /**
   * Test random scala stuff and see if it works on Android
   */
  override def onCreate(savedInstanceState: Bundle) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.main)
    val btn = this.findView[Button](R.id.btn)

    btn.click((view: View) ⇒
      Toast.makeText(this,
        "This toast was made by auto-implementing a View.OnClickListener " +
          "through an implicit function and a lambda passed to setOnClickListener",
        Toast.LENGTH_SHORT).show()
    )

  }
}


object MyActivity {

  implicit class PimpMyView(val view: View) extends AnyVal {

    def click(funct: (View) ⇒ Unit) = view.setOnClickListener(new OnClickListener {
      override def onClick(v: View): Unit = funct(v)
    })
  }

  implicit class PimpMyActivity(val a: Activity) extends AnyVal {
    /**
     * Generic Type method to deal with annoying conversions for views
     *
     * @param id - the Resource ID for the view in question
     * @tparam T - the type associated with the widget (Button, TextView, etc)
     * @return the found view with the desired type
     */
    def findView[T](id: Int): T = {
      a.findViewById(id).asInstanceOf[T]
    }
  }

}