Androidでラジオボタンを実装する方法

    fun onRadioButtonClicked(view: View) {
        btn_next.isEnabled = true
        if (view is RadioButton) {
            // Is the button now checked?
            val checked = view.isChecked

            // Check which radio button was clicked
            when (view.getId()) {
                R.id.rb_drive ->
                    if (checked) {
                        type = "drive"
                    }
                R.id.rb_resume ->
                    if (checked) {
                        type = "resume"
                    }
                R.id.rb_passport ->
                    if (checked) {
                        type = "passport"
                    }
                R.id.rb_visa ->
                    if (checked) {
                        type = "visa"
                    }
            }
        }
    }