sample_of_using_rxview_clicks.kt

// Whatever Activity

private val mDisposables = CompositeDisposable()
private val mBtnFoo by lazy { findViewById<View>(R.id.foo) }

override fun onResume() {
    mDisposables.add(
        RxView.click(mBtnFoo)
              .subscribe { 
                  println("oh click on Foo")
              })
}

override fun onPause() {
    mDisposables.clear()
}