The animation in the fragment does not work.

Question

When switching to a fragment, the animation does not work

Here is the code:

@Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View contentView = inflater.inflate(R.layout.activity_main2, container, false); slideUp = contentView.findViewById(R.id.slideup); slideDown = contentView.findViewById(R.id.slideDown); line_item = contentView.findViewById(R.id.scan_item); slideDown.animate().setDuration(DURATION).translationYBy(slideDown.getHeight()); return contentView; }

Answer 1 · 2017-08-17T10:32:14

Your animation works out before you see anything on the screen, transfer the animation to the onResume() method.

UPDATE

slideDown.getHeight() in onCreate() will return 0 to you, just as if you try to do it right away in onResume()

Hang the kelbeck on the Обсервер in onCreate() (or onResume() - depending on how you please) on your view.

 slideDown.getViewTreeObserver().addOnGlobalLayoutListener(this);

and in Kelbeck already directly work out the animation

 @Override public void onGlobalLayout() { slideDown.getViewTreeObserver().removeGlobalOnLayoutListener(this); slideDown.animate().setDuration(DURATION).translationYBy(slideDown.getHeight()); }

The animation in the fragment does not work.

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