how to Get behaviour of super.onbackpressed() within overrided onbackpressed()

Question

I was tried to go back with confirmation dialog so that i was decided to handle onbackpressed() and then i had put my code for confirm dialog with ok and cancel button for null listener.

@Override
public void onBackPressed() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Confirmation");
    builder.setMessage("Are you sure want to exit?");
    builder.setPositiveButton("OK",null);
    builder.setNegativeButton("Cancel", null);
    builder.show();   
}

It was worked fine but the problem is if i click ok but it should continue for behaviour of super.onbackpressed() otherwise it should be in same activity.
the following code that i had tried.

@Override
public void onBackPressed() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Confirmation");
    builder.setMessage("Are you sure want to exit?");
    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            //super.onBackPressed();
        }
    });
    builder.setNegativeButton("Cancel", null);
    builder.show();   
}

Answer 1

put finish() to finish your activity in onclick of positive button ...

builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {

    @Override
    public void onClick(DialogInterface dialog, int which) {
        //super.onBackPressed();
        finish();
    }
});

Answer 2

To call the exact same super method:

YourActivity.super.onBackPressed();