我已经使用MotionLayout而不是Coordinator创建了自定义的折叠视图,除了自动完成动画外,其他所有功能都可以正常工作,或者在协调器中我们可以称其为捕捉,例如当我们在之间滚动和停止滚动时,折叠视图将自动捕捉顶部或底部。但是如果我在NestedScrollView
中使用MotionLayout
,则不会发生这种情况。我已经创建了示例来演示这一点。我还添加了app:onTouchUp="autoComplete"
,但它不起作用。
motion_layout.xml
<androidx.constraintlayout.motion.widget.MotionLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layoutDescription="@xml/motion_scene">
<View
android:id="@+id/collapsible"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@color/red" />
<androidx.core.widget.NestedScrollView
android:id="@+id/nested_scroll_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<View
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#EEE" />
///.......///
</LinearLayout>
</androidx.core.widget.NestedScrollView>
motion_scene.xml
<MotionScene xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<Transition
app:constraintSetEnd="@id/end"
app:constraintSetStart="@id/start"
app:duration="1000">
<OnSwipe
app:dragDirection="dragUp"
app:onTouchUp="autoComplete"
app:touchAnchorId="@id/nested_scroll_view"
app:touchAnchorSide="top" />
</Transition>
<ConstraintSet android:id="@+id/start">
<Constraint
android:id="@+id/collapsible"
android:layout_width="0dp"
android:layout_height="300dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Constraint
android:id="@id/nested_scroll_view"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/collapsible" />
</ConstraintSet>
<ConstraintSet
android:id="@+id/end"
app:deriveConstraintsFrom="@id/start">
<Constraint
android:id="@+id/collapsible"
android:layout_width="0dp"
android:layout_height="100dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Constraint
android:id="@id/nested_scroll_view"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/collapsible" />
</ConstraintSet>
</MotionScene>