If you don't talk much, first go to the renderings

Implementation ideas

1. Show PopupWindow on screen
2. Traverse the parent layout to get the child layout View
3. Set the entry and exit animation for each View, and use the Handler to delay

1. Display PopupWindow

private void showWindow() {
        View layout = getLayoutInflater().inflate(R.layout.window_popup, null);
        final RelativeLayout relativeLayout = layout.findViewById(R.id.relative_popup);
        relativeLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Add exit animation
                closeAnimation(relativeLayout);
            }
        });
        popupWindow = new PopupWindow(layout, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        popupWindow.setFocusable(true);
        popupWindow.setBackgroundDrawable(new BitmapDrawable());
        //Add entry animation
        showAnimation(relativeLayout);
        popupWindow.setOutsideTouchable(false);
        popupWindow.setFocusable(false);
        popupWindow.showAtLocation(getWindow().getDecorView(), Gravity.BOTTOM, 0, 0);
    }

2. Entry animation

private void showAnimation(ViewGroup layout) {
        for (int i = 0; i < layout.getChildCount(); i++) {
            final View child = layout.getChildAt(i);
            child.setVisibility(View.INVISIBLE);
            mHandler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    child.setVisibility(View.VISIBLE);
                    ValueAnimator fadeAnim = ObjectAnimator.ofFloat(child, "translationY", 800, 0);
                    fadeAnim.setDuration(800);
                    KickBackAnimator kickAnimator = new KickBackAnimator();
                    kickAnimator.setDuration(800);
                    fadeAnim.setEvaluator(kickAnimator);
                    fadeAnim.start();
                }
            }, i * 50);
        }
    }

Class to achieve rebound effect

import android.animation.TypeEvaluator;

public class KickBackAnimator implements TypeEvaluator<Float> {

    private final float s = 1.70158f;
    float mDuration = 0f;

    public void setDuration(float duration) {
        mDuration = duration;
    }

    public Float evaluate(float fraction, Float startValue, Float endValue) {
        float t = mDuration * fraction;
        float b = startValue.floatValue();
        float c = endValue.floatValue() - startValue.floatValue();
        float d = mDuration;
        float result = calculate(t, c, b, d);
        return result;
    }

    public Float calculate(float t, float c, float b, float d) {
        return b * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + c;
    }
}

Exit animation

private void closeAnimation(ViewGroup layout) {
        ArrayList<View> viewArrayList = new ArrayList<>();
        for (int i = 0; i < layout.getChildCount(); i++) {
            viewArrayList.add(layout.getChildAt(i));
        }
        Collections.reverse(viewArrayList);
        for (int i = 0; i < viewArrayList.size(); i++) {
            final View child = viewArrayList.get(i);
            mHandler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    ValueAnimator fadeAnim = ObjectAnimator.ofFloat(child, "translationY", 0, -900);
                    fadeAnim.setDuration(800);
                    fadeAnim.start();
                    fadeAnim.addListener(new Animator.AnimatorListener() {
                        @Override
                        public void onAnimationStart(Animator animation) {

                        }

                        @Override
                        public void onAnimationEnd(Animator animation) {
                            child.setVisibility(View.INVISIBLE);
                            //Judge if it is the last View to exit, and exit the PopupWindow window
                            if (child.getId() == R.id.source_linear) {
                                popupWindow.dismiss();
                            }
                        }

                        @Override
                        public void onAnimationCancel(Animator animation) {

                        }

                        @Override
                        public void onAnimationRepeat(Animator animation) {
                            
                        }
                    });
                }
            }, i * 50);
        }
    }