How do I fire an event when click occurs outside a dialog

It Works For me,,

        Window window = dialog.getWindow();
        window.setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
                WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);
        window.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);

        dialog.show();

See this http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_NOT_TOUCH_MODAL

When dialog.setCanceledOnTouchOutside(true); then you just override onCancel() like this:

dialog.setOnCancelListener(
        new DialogInterface.OnCancelListener() {
            @Override
            public void onCancel(DialogInterface dialog) {
                //When you touch outside of dialog bounds, 
                //the dialog gets canceled and this method executes.
            }
        }
);

Type your code inside the onCancel() method so it runs when the dialog gets canceled.

In DialogFragment you can use AlertDialog and the answer of @silverTech:

override fun onDismiss(dialog: DialogInterface) {
    yourMethod()
    super.onDismiss(dialog)
}

or

override fun onCancel(dialog: DialogInterface) {
    yourMethod()
    super.onCancel(dialog)
}