[Java] 위에서 아래로 펼쳐지는 애니메이션 효과

 

// 펼칠경우

slideView(targetView, targetView.getLayoutParams().height, 200);

 

// 숨길경우

slideView(targetView, targetView.getLayoutParams().height, 0);

public static void slideView(View view,
                                 int currentHeight,
                                 int newHeight) {

        ValueAnimator slideAnimator = ValueAnimator
                .ofInt(currentHeight, newHeight)
                .setDuration(500);

        /* We use an update listener which listens to each tick
         * and manually updates the height of the view  */

        slideAnimator.addUpdateListener(animation1 -> {
            Integer value = (Integer) animation1.getAnimatedValue();
            view.getLayoutParams().height = value.intValue();
            view.requestLayout();
        });

        // 시작 / 끝 / 취소 / 반복 동작에 대한 Listener
        slideAnimator.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(@NonNull Animator animator) {

            }

            @Override
            public void onAnimationEnd(@NonNull Animator animator) {

            }

            @Override
            public void onAnimationCancel(@NonNull Animator animator) {

            }

            @Override
            public void onAnimationRepeat(@NonNull Animator animator) {

            }
        });

        /*  We use an animationSet to play the animation  */

        AnimatorSet animationSet = new AnimatorSet();
        animationSet.setInterpolator(new AccelerateDecelerateInterpolator());
        animationSet.play(slideAnimator);
        animationSet.start();
    }