Kotlin Android

button.kt

val button: Button = findViewById(R.id.Button02) as Button
        button setOnClickListener (object: View.OnClickListener {
            public override fun onClick(view: View): Unit {
                
            }
        })

intent.kt

val i = Intent(getApplicationContext() as Context, javaClass<MainActivity2>())
startActivity(i)

meta.kt

private fun getApiKey() : String? {
  val  appliInfo : ApplicationInfo? =
  getPackageManager()?.getApplicationInfo(getPackageName(), PackageManager.GET_META_DATA)
  return appliInfo?.metaData?.getString("fb_api_key")
}