How to create such an animation?

Question

Android

private void setWeigtnMemory(float k,int visibility){
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
        ViewGroup.LayoutParams.MATCH_PARENT, 0);
        float v = context.getResources().getDisplayMetrics().density;
        params.weight = k;
        params.topMargin = (int) (20*v);
        params.leftMargin = (int) (10*v);
        params.rightMargin = (int) (10*v);
        relativeMemory.setVisibility(visibility);
        relativeWeigth.setLayoutParams(params);
    }

I call the method like this: or Everything is fine, but advise how to attach an animation to this case so that it works smoothly
setWeigtnMemory(1.2f,View.GONE);
setWeigtnMemory(2.4f,View.VISIBLE);

Answer 1

If this is a picture, then through PorterDuff.Mode
If it is a container, then through setAlpha
The algorithm is simple, for example, reduce/increase transparency by 25% 4 times. Or 5 times 20%. Or 10 times 10%.
If the picture is in a container, and you need to show a smooth disappearance, then first change the transparency of the picture from 100 to 0, and at the end assign the container View.GONE