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import android.support.v7.app.AppCompatActivity

import android.os.Bundle

import android.view.View

import android.widget.*

import kotlinx.android.synthetic.main.activity_main.*

import android.widget.RadioGroup

import android.widget.Toast

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        setContentView(R.layout.activity_main)

//Radio button on click change

radio_group.setOnCheckedChangeListener(

    RadioGroup.OnCheckedChangeListener{

        group, checkedId ->

        val radio_langange: RadioButton = findViewById(checkedId)

        Toast.makeText(applicationContext," On Checked change :${radio_langange.text}",Toast.LENGTH_SHORT).show()

    }

)

        // Get radio group selected status and text using button click event

      button.setOnClickListener{

           // Get the checked radio button id from radio group

           var id: Int = radio_group.checkedRadioButtonId

          if (id!=-1){ // If any radio button checked from radio group

              // Get the instance of radio button using id

               val radio:RadioButton = findViewById(id)

            Toast.makeText(applicationContext,"On button click : ${radio.text}",

                 Toast.LENGTH_SHORT).show()

            }else{

                // If no radio button checked in this radio group

               Toast.makeText(applicationContext,"On button click : nothing selected",

                   Toast.LENGTH_SHORT).show()

          }

      }

   }

    // Get the selected radio button text using radio button on click listener

    fun radio_button_click(view: View){

      // Get the clicked radio button instance

      val radio: RadioButton = findViewById(radio_group.checkedRadioButtonId)

       Toast.makeText(applicationContext,"On click : ${radio.text}",

         Toast.LENGTH_SHORT).show()

    }

}