Android Studio Giraffe Essentials - Kotlin Edition by Smyth Neil;

Author:Smyth, Neil;
Language: eng
Format: epub
Publisher: Payload Media
Published: 2023-08-11T19:02:10+00:00

49.2 MotionLayout

When implementing animation, the ConstraintLayout container typically used in a user interface must first be converted to a MotionLayout instance (a task which can be achieved by right-clicking on the ConstraintLayout in the layout editor and selecting the Convert to MotionLayout menu option). MotionLayout also requires at least version 2.0.0 of the ConstraintLayout library.

Unsurprisingly since it is a subclass of ConstraintLayout, MotionLayout supports all of the layout features of the ConstraintLayout. Therefore, a user interface layout can be similarly designed when using MotionLayout for views that do not require animation.

For views that are to be animated, two ConstraintSets are declared, defining the appearance and location of the view at the start and end of the animation. A transition declaration defines keyframes to apply additional effects to the target view between these start and end states and click and swipe handlers used to start and control the animation.

The start and end ConstraintSets and the transitions are declared within a MotionScene XML file.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.