👀 Views: 100 💬 Answers: 1 📅 Created: 2025-06-20

android motionlayout constraintlayout animation Kotlin

Hey everyone, I'm running into an issue that's driving me crazy... I need help solving I'm working on a personal project and Hey everyone, I'm running into an issue that's driving me crazy. I'm experiencing a peculiar issue with a MotionLayout transition in my Android 14 app. I've implemented a simple animation where I want to move a button from the bottom of the screen to the center when the user clicks it. However, when I run the app, the button seems to jump to an unexpected position instead of smoothly transitioning to the center. I've verified that the `ConstraintSet` is correctly set up, yet the behavior is inconsistent between different devices. Below is the relevant XML and Kotlin code for the MotionLayout: ```xml <androidx.constraintlayout.motion.MotionLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/motionLayout" android:layout_width="match_parent" android:layout_height="match_parent" app:layoutDescription="@xml/motion_scene"> <Button android:id="@+id/myButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Click Me" android:layout_marginBottom="16dp" android:layout_gravity="bottom|center_horizontal" /> </androidx.constraintlayout.motion.MotionLayout> ``` And here’s the motion scene XML: ```xml <MotionScene xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"> <Transition motion:constraintSetStart="start" motion:constraintSetEnd="end" motion:duration="300"> <OnSwipe motion:dragDirection="dragUp" motion:touchAnchorId="@id/myButton" motion:touchRegionId="@id/myButton" /> </Transition> <ConstraintSet android:id="start"> <Constraint android:id="@id/myButton"> <layout_constraintBottom_toBottom_of android:id="@+id/motionLayout" /> <layout_constraintStart_toStart_of="parent" /> <layout_constraintEnd_toEnd_of="parent" /> </Constraint> </ConstraintSet> <ConstraintSet android:id="end"> <Constraint android:id="@id/myButton"> <layout_constraintBottom_toTop_of="parent" /> <layout_constraintStart_toStart_of="parent" /> <layout_constraintEnd_toEnd_of="parent" /> </Constraint> </ConstraintSet> </MotionScene> ``` I’ve tried adjusting the `layout_constraintBottom_toBottom_of` and `layout_constraintBottom_toTop_of`, but it still feels off. On some devices, the button settles at the top instead of the center, leading to a frustrating user experience. I've also checked for any conflicting constraints in the layout, but nothing seems out of place. Is there a specific setup or debugging technique I might be missing to ensure a smooth transition across devices? My development environment is macOS. I'd really appreciate any guidance on this. What am I doing wrong? The project is a application built with Kotlin. Thanks for taking the time to read this! Is this even possible?