当我使用 RecyclerView 和 SwipeRefreshLayout 在 MotionLayout 中做一些动画时，事情变得很奇怪

Question

当 RecyclerView 向上拖动时，我使用 MotionLayout 来实现一些很酷的效果，但看起来当我想将 SwipeRefreshLayout 与 RecyclerView 一起使用时，事情会发生冲突。

如果没有 SwipeRefreshLayout，那很好

如果我用 SwipeRefreshLayout 包围，向上拖动的行为就像反对一样奇怪

https://gist.github.com/GHChrisSu/6aadf40dc693bc47cbb83a167a82a4b9

运动场景如下

https://gist.github.com/GHChrisSu/a154d59f34555cccfc1b48617989ae16

Answer 1

你应该换你MotionLayout的SwipeRefreshLayout是这样的：

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
            android:id="@+id/refresh"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <androidx.constraintlayout.motion.widget.MotionLayout
                android:id="@+id/motion_layout"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layoutDescription="@xml/play_scene">

                <!-- Some xml code -->

            </androidx.constraintlayout.motion.widget.MotionLayout>

        </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

    </androidx.constraintlayout.widget.ConstraintLayout>

然后，你必须添加MotionLayout.TransitionListener到您MotionLayout给enable/disable您SwipeRefreshLayout取决于MotionLayout状态。

binding.motionLayout.setTransitionListener(object :MotionLayout.TransitionListener{
        override fun onTransitionTrigger(p0: MotionLayout?, p1: Int, p2: Boolean, p3: Float) {

        }

        override fun onTransitionStarted(p0: MotionLayout?, p1: Int, p2: Int) {
        }

        override fun onTransitionChange(p0: MotionLayout?, p1: Int, p2: Int, p3: Float) {
            Log.d("RepairsFragment","$p1 $p2 $p3")
            if (p3 == 0f) {
                binding.refresh.isEnabled=true
            } else {
                binding.refresh.isEnabled = false
                binding.refresh.isRefreshing=false
            }
        }

        override fun onTransitionCompleted(p0: MotionLayout?, p1: Int) {
        }
    })