package com.myapp import android.app.Activity import android.os.Bundle import java.io.File import kotlinx.android.synthetic.main.layout.* class MyActivity : Activity() { override fun onCreate(savedInstanceState: Bundle?) { login.setOnClickListener { } login.text = "Login" val login = "Login" val login42 = login + "42" } fun foo(): String { val login = "Login" return login + "42" } } class AnotherActivity : Activity() { private val login: String = "login" fun test() { login.length (this as Activity).login.text = "login" } }