Remember to update your AndroidManifest.xml

LoginActivity.kt

package com.netvirta.android.login

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import com.netvirta.common.login.LoginView
import sample.R

class LoginActivity : AppCompatActivity(), LoginView {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_login)
    }

    override fun loginResult(result: Boolean) {

    }
}