Adding animation to the closing of DialogFragment when tapping outside

Question

I am new to Android development (from Swift/iOS). I am trying to add some animation to this closing of a DialogFragment when I tap outside the view. I have read various posts on animation for Dialogs and found posts that helped to get this far for my solution.

What works:

• Nicely scales up and fades in the alert (the onStart() is working)
• Nicely scales down and fades out the alert when the "Close" button is tapped (the onClick() is working)

What does not work:

• Tapping outside the alert. It closes the alert without the graceful animation.

Technically this is for:

1. DialogFragment
2. Using an AlertDialog.Builder
3. The cancelable property is set to true on the builder
4. The setCanceledOnTouchOutside property is set to true on the created AlertDialog.
5. Using ObjectAnimator for my animations
6. For customer compliance, I need to support both a close button and "tap outside" to cancel/dismiss the dialog.
7. From my discovery onCancel happens before onDismiss

Issues:

I was excited to add an OnCancelListener to my dialog. However, during runtime I received an error, basically stating

Note: DialogFragment own the Dialog.setOnCancelListener and Dialog.setOnDismissListener callbacks. You must not set them yourself. To find out about these events, override onCancel(DialogInterface) and onDismiss(DialogInterface).

Ok. Easy enough, I thought I would override OnCancel.

I did, but the animation does occur when I tap outside the alert dialog fragment. It still cancels (closes) - just no animation. Debugging, I see it step into my code, but the alert is already closed/hide/canceled as soon as I enter the overridden onCancel() method. It seems like I am too late in the lifecycle. Since I cannot override OnCancelListener for DialogFragments, I was wondering if anyone has a solution or insight into my dilemma.

Long and Short: I would like to be able to have the same animation I have for clicking on the dialog's close button as I do when clicking outside the alert.

Here is my code snippet:

public void onStart() {
    super.onStart();

    AlertDialog dialog = (AlertDialog)getDialog();
    ObjectAnimator scaleUp = scaleUp(dialog);
    scaleUp.start();

    Button closeButton = dialog.getButton(Dialog.BUTTON_NEGATIVE);
    closeButton.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            AlertDialog dialog = (AlertDialog)getDialog();
            ObjectAnimator scaleDown = scaleDown(dialog);
            scaleDown.addListener(new Animator.AnimatorListener() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    dismiss();
                }
                @Override
                public void onAnimationStart(Animator animation) {
                }
                @Override
                public void onAnimationCancel(Animator animation) {
                }
                @Override
                public void onAnimationRepeat(Animator animation) {
                }
            });
            scaleDown.start();
        }
    });
}

Here is the onCancel override:

    @Override
public void onCancel(final DialogInterface dialog) {

    ObjectAnimator scaleDown = scaleDown((AlertDialog)dialog);
    scaleDown.addListener(new Animator.AnimatorListener() {
        @Override
        public void onAnimationEnd(Animator animation) {
            Log.i("DialogFragment","onAnimationEnd");
            dialog.dismiss();
        }

        @Override
        public void onAnimationStart(Animator animation) {
            Log.i("DialogFragment","onAnimationStart");
        }
        @Override
        public void onAnimationCancel(Animator animation) {
        }
        @Override
        public void onAnimationRepeat(Animator animation) {
        }
                          });
    scaleDown.start();


}

The two methods scaleUp and scaleDown are just refactored, they are just the settings for the ObjectAnimator.

Followup: The inspiration of my solution was found in the one marked as possible duplicate. Change DialogFragment enter/exit transition at just before dismissing, however this does not address the specifics situation I had outlined - animation when tapping outside the dialog.

The solution I used from that link is great close animating when tapping on a button inside the dialog, but does not handle the setCanceledOnTouchOutside(true)