AlertDialogActivity.kt

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.LayoutInflater
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import com.example.flipkotlinfirst.R
import com.example.flipkotlinfirst.util.AlertDialogUtility
import kotlinx.android.synthetic.main.activity_alert_dialog.*
import kotlinx.android.synthetic.main.dialog_layout.view.*

class AlertDialogActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_alert_dialog)
      //  For custom dilaog box inside file.
        btn_alert.setOnClickListener {

            val layoutBuilder = LayoutInflater.from(this).inflate(R.layout.dialog_layout, null)
            val builder = AlertDialog.Builder(this).setView(layoutBuilder)
            builder.show()

            layoutBuilder.btn_ok.setOnClickListener {
                Toast.makeText(this, "Alert Text: " + layoutBuilder.et_name.text.toString(), Toast.LENGTH_SHORT).show()
            }
        }

      //   for custom dilaog box outside file.
      //   Static Alert dilaog to used in more than one file with minimum code.
        btn_alert_custom.setOnClickListener {
            AlertDialogUtility.alertDialog(this, "Hello I am Alert Dialog", 1)
        }
    }
}