Question

As a beginner in Android and having been away from programming for many years, I could not find an answer for this one on the internet. It involves the following code from a book I have been reading, but the syntax is common for Android. I couldn’t work out what the }); represented. As someone who, in the past, has made an effort to make bracketing readable, I find this code amazing, surely a better way of showing this is possible?

Here’s the code:

CheckBox checkBox = (CheckBox)findViewById(R.id.chkAutosave);
checkBox.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
        if (((CheckBox)v).isChecked())
            DisplayToast("CheckBox is checked");
        else
            DisplayToast("CheckBox is unchecked");
    }
});

Anyway does anyone know the meaning of the }); at the end?

Answer 1

It’s the close the definition of the anonymous implementation of View.OnClickListener and then to close the method call setOnClickListener().

To make it more clear, the code is equivalent to:

View.OnClickListener listener = new View.OnClickListener() {
    public void onClick(View v) {
        if (((CheckBox)v).isChecked())
            DisplayToast("CheckBox is checked");
        else
            DisplayToast("CheckBox is unchecked");
    }
};

checkBox.setOnClickListener(listener);