Set RadioGroup selected RadioButton by value of String

Question

Since Kotlin does not support traditional for loop is there a way to select a RadioButton in a RadioGroup if the String x value matched the RadioButton text?

Something like this will work on Java but not in Kotlin

 for(i...radioGroup.childCount){
        int radioButtonID = radioButtonGroup.getCheckedRadioButtonId();
        View radioButton = radioButtonGroup.findViewById(radioButtonID);
        int idx = radioButtonGroup.indexOfChild(radioButton);
    }

Then something like this code to select the correct radio based on String value

if(radioBtn.text.toString.equals("Sample"))
       radioBt.check(R.id.radio1);
    else 
       radioBt.check(R.id.radio2);

Answer 1

rg - your radioGroup

for (rbPosition in 0 until rg.childCount) {
            val rb = rg.getChildAt(rbPosition) as RadioButton
            if (rb.text == yourText) {
                //do stuff for example rb.isChecked = true
            }
        }

Answer 2

You can get all the radio buttons inside a radio group by using radioGroup.children.
And you can iterate over this collection similar to how @rost suggested.
A more functional way of finding the button can be:

val radioButton = radioGroup.children
                      .map { it as RadioButton } // Convert the sequence of Views to sequence of RadioButtons
                      .find { it.text == buttonText }!! // Don't use this !! if there's a possibility that no RadioButton with provided text exists

// Now you have the button, use it however you want

Answer 3

I think this is better since it may have any views other than RadioButton.

val radioButton = radioGroup.children.filter {
        it is RadioButton && it.text == "YOUR STRING HERE"
    }.map {
        it as RadioButton
    }.firstOrNull()
    
radioButton?.let { 
        it.isChecked = true
    }