Question

In the Developer.Android example here what does the newRadioButton.setId(R.id.snack); do?

In these examples they use variable names that are suppose to help the learner infer what it does. So why did they choose to call it a snack here?
Did they call it a snack to try to lead me to think of it as a radio hint?

Edit Found out they are calling it a ‘snack’ only because the previous example used food themed variables

Answer 1

I don’t know why they called it snack.
But what the mean with :newRadioButton.setId(R.id.snack);
that they give it an ID.
They made the radiobutton on previousd 2 lines, and when you give it an ID, you can use the radiobutton in the code, for example:

//Making RadioButton
RadioButton newRadioButton = new RadioButton(this);

//Give the RadioButton an ID
newRadioButton.setId(R.id.snack);

//making a variable called snack_choice
RadioButton snackchoice;

//Assign an radiobutton to the variable
snack_choice = (RadioButton) findViewById(R.id.snack);

//Use it
if (snack_choice.isChecked()) {
            //do something
        }

I hope you understand it.

However, I prefer to make buttons in the XML file.