How can I color Circiural Reveral Animation in Android Activity Transition?

Question

While searching for an animation with a circular transition on the internet, I came across the code below.. but I want to improve it, can you help with this?

1. First of all, there is an error that it does not open exactly from the targeted place, but I could not find it.
2. I want to color the background during transition

how can I do these? Like this= https://medium.com/@gabornovak/circular-reveal-animation-between-fragments-d8ed9011aec

public class RevealAnimation {
    public static final String EXTRA_CIRCULAR_REVEAL_X = "EXTRA_CIRCULAR_REVEAL_X";
    public static final String EXTRA_CIRCULAR_REVEAL_Y = "EXTRA_CIRCULAR_REVEAL_Y";

    private final View mView;
    private final Activity mActivity;

    private int revealX;
    private int revealY;

    public RevealAnimation(View view, Intent intent, Activity activity) {
        mView = view;
        mActivity = activity;
        if (intent.hasExtra(EXTRA_CIRCULAR_REVEAL_X) && intent.hasExtra(EXTRA_CIRCULAR_REVEAL_Y)) {
            view.setVisibility(View.INVISIBLE);

            revealX = intent.getIntExtra(EXTRA_CIRCULAR_REVEAL_X, 0);
            revealY = intent.getIntExtra(EXTRA_CIRCULAR_REVEAL_Y, 0);

            ViewTreeObserver viewTreeObserver = view.getViewTreeObserver();
            if (viewTreeObserver.isAlive()) {
                viewTreeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                    @Override
                    public void onGlobalLayout() {
                        revealActivity(revealX, revealY);
                        mView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                    }
                });
            }
        } else {
            view.setVisibility(View.VISIBLE);
        }
    }

    public void revealActivity(int x, int y) {
        float finalRadius = (float) (Math.max(mView.getWidth(), mView.getHeight()) * 1.1);
        Animator circularReveal = ViewAnimationUtils.createCircularReveal(mView, x, y, 0, finalRadius);
        circularReveal.setDuration(300);
        circularReveal.setInterpolator(new AccelerateInterpolator());
        mView.setVisibility(View.VISIBLE);
        circularReveal.start();
    }

    public void unRevealActivity() {
        float finalRadius = (float) (Math.max(mView.getWidth(), mView.getHeight()) * 1.1); // I think the error is here but nothing has changed
        Animator circularReveal = ViewAnimationUtils.createCircularReveal(
                mView, revealX, revealY, finalRadius, 0);

        circularReveal.setDuration(300);
        circularReveal.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                mView.setVisibility(View.INVISIBLE);
                mActivity.finish();
                mActivity.overridePendingTransition(0, 0);
            }
        });

        circularReveal.start();

        if (MainActivity.getInstance()!=null){
            MainActivity.getInstance().mainActivityBottomBar();
        }
    }
}

StartActivity

int revealX =(mainBottomBarLayout.getLeft() + mainBottomBarLayout.getRight()) / 2;
int revealY =(mainBottomBarLayout.getTop() + mainBottomBarLayout.getBottom()) / 2;
Intent intent = new Intent(MainActivity.this, intentClass);
intent.putExtra(RevealAnimation.EXTRA_CIRCULAR_REVEAL_X, revealX);
intent.putExtra(RevealAnimation.EXTRA_CIRCULAR_REVEAL_Y, revealY);
startActivity(intent);
overridePendingTransition(0, 0);

Style

<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">@android:color/transparent</item>