My code... Help-me class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) showOtherActivitie() } fun showOtherActivitie () { abc_botao.setOnClickListener { //Toast.makeText(this, "toast", Toast.LENGTH_SHORT).show() //var intent = Intent(this, OtherActivity::class.java) startActivity(Intent(this, OtherActivity::class.java)) finish() } // } }