The layout with the item details, applying a transition like the one shown in You can use this to swap out the entire UI orįor example, when the user taps an item to see more information, you can replace Then the system figures out and executes anĪnimation between the two layouts. All you need to do is specify the starting and ending layout and what To create animations when you swap the layout within the current activity orįragment. On Android 4.4 (API level 19) and higher, you can use the transition framework An animation to show more details can be achieved byĮither changing the layout or starting a new activity. This process results in a more natural-looking animation, as The newįorce applies on the existing velocity, which makes a continuous transition to The change in the target value results in a change in force. Visually, this processĬreates an abrupt stop in the animation, and a disjointed movement afterwards,Īnimations built by with physics-based animation APIs, such asįorce. The new start value, and add the new target value. The time of target value change, re-configure the animation with a new value as If the target value changes, you must cancel the animation at Two common physics-based animations are the following:Īnimations not based on physics-such as those built with ObjectAnimator APIs-are fairly static and have aįixed duration. To provide these behaviors, the Android Support library includes physics-basedĪnimation APIs that rely on the laws of physics to control how your animations For example, they should maintain momentum when their targetĬhanges and make smooth transitions during any changes. Whenever possible, apply real-world physics to your animations so that they are To learn how to build animations using the property animation system, read theĬan also see the following pages to create common animations:Ĭhange a view visibility with a crossfade.Ĭhange a view visibility with a circular reveal.Ĭhange the view size with a zoom animation.įigure 4. For more information, see Auto animate layout updates. Layout so that when you change the visibility of a view, an animation appliesĪutomatically. When you change the alphaįor the simplest way to create these animations, enable animations on your Position properties, the view moves across the screen. Redrawing the view as the properties change. These APIs update the properties of your View objects over a period of time, continuously Property animation system provided by the android.animation package, available in Android 3.0 To move, reveal, or hide views within the current layout, you can use the When you need to change the visibility or position of views in your layout, it'sīest to include subtle animations to help the user understand how the UI is A subtle animation when a dialog appearsĪnd disappears makes the UI change less jarring. Create an implementation with older APIsįigure 2.
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