How to handle Back button with in the dialog?

by 
dialog.setOnKeyListener(new Dialog.OnKeyListener() {

            @Override
            public boolean onKey(DialogInterface dialog, int keyCode,
                    KeyEvent event) {                   
                if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
                    finish();
                    dialog.dismiss();
                }
                return true;
            }
        });

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