To learn how to do that, take a look at the Basic Knowledge section. If you’re using a RecyclerView you might need to postpone the enter transition on the destination fragment. On the destination fragment we define the same transition but on enterTransition and returnTransition. On the first fragment we define exitTransition and reenterTransition to MaterialFadeThrough. The transition here consists of going from the items fragment to the cart fragment. The fade through pattern is used for transitions between UI elements that do not have a strong relationship to each other. We’ll start with one of the simplest transitions, MaterialFadeThrough. To do that you need to call postponeEnterTransition to postpone the transitions and call startPostponedEnterTransition when you’ve populated your views. If you have views that are populated after the fragment is created (a RecyclerView for example) you need to tell the transition system to wait before starting the transitions. You can also apply it to the out most view in your layout to make the fragment animate as a whole. If that’s not the behavior you expect, set android:transitionGroup="true" on the view group to disable that. For example, if you have a RecyclerView, the animation will be applied to it and to its children. If no return transition is set, the transition system will automatically reverse the enter transition when navigating back.īy default, transitions run on all child views within their scene root hierarchy.
: Index: 5, Size: 5Īt (ArrayList.java:437)Īt .setNameOverridesReordered(FragmentTransitionImpl.java:183)Īt .startTransitions(DefaultSpecialEffectsController.java:665)
I was getting an IndexOutOfBoundsException exception when messing around with shared transitions and I took me a while to discover that the fragment library was the problem. If you’re using androidx.appcompat:appcompat:1.3.0 you’ll have to manually specify agment:fragment-ktx:1.3.5 because appcompat:1.3.0 depends on fragment:1.3.4 that introduced a bug related to fragment transitions. I believe small UX details like can help in differentiating your app.Without transitions / With transitions Preparationīefore we start, make sure you’re not using the wrong library version. Inferring home screen icon location for animations opens up new ways to innovatively welcome users on to your app. In this article, sourceBounds from Intent was introduced and was explored in context of animations. */ public Rect getSourceBounds () Summary * used as a hint to the receiver for animations and the like. * Get the bounds of the sender of this intent, in screen coordinates.
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