Android: show/hide a view using an animation

Question

I\'ve been looking through many google results / questions on here to determine how to show/hide a view via a vertical animation, but I can\'t seem to find one that\'s exactly r

Answer 1

I have used this two function to hide and show view with transition animation smoothly.

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public void expand(final View v, int duration, int targetHeight, final int position) {

        int prevHeight = v.getHeight();

        v.setVisibility(View.VISIBLE);
        ValueAnimator valueAnimator = ValueAnimator.ofInt(0, targetHeight);
        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                v.getLayoutParams().height = (int) animation.getAnimatedValue();
                v.requestLayout();
            }
        });
        valueAnimator.setInterpolator(new DecelerateInterpolator());
        valueAnimator.setDuration(duration);
        valueAnimator.start();
        valueAnimator.addListener(new AnimatorListenerAdapter() {

            @Override
            public void onAnimationEnd(Animator animation) {
                v.clearAnimation();
            }
        });

    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public void collapse(final View v, int duration, int targetHeight, final int position) {
        if (position == (data.size() - 1)) {
            return;
        }
        int prevHeight = v.getHeight();
        ValueAnimator valueAnimator = ValueAnimator.ofInt(prevHeight, targetHeight);
        valueAnimator.setInterpolator(new DecelerateInterpolator());
        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                v.getLayoutParams().height = (int) animation.getAnimatedValue();
                v.requestLayout();
            }
        });
        valueAnimator.setInterpolator(new DecelerateInterpolator());
        valueAnimator.setDuration(duration);
        valueAnimator.start();
        valueAnimator.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                animBoolArray.put(position, false);
                v.clearAnimation();

            }
        });
    }