RecyclerView 阻止在 MotionLayout 中滑动

RecyclerView blocks swipe in MotionLayout

我在回收站视图前面（添加文件夹类对话框）的视图中滑动时遇到问题。当我执行滑动手势时，它只是在它后面的 RecyclerView 中滚动。

然而，当我尝试将 RecyclerView 的可见性设置为 GONE 时，效果很好，所以我怀疑焦点有问题或者 Recycler it self，虽然我在场景改变时清除焦点。

这是video without RecyclerView

这是video with the RecyclerView

显示设置和文件夹对话框的方法：

private void showSettings(){
        if (!settingBox.hasFocus()){
            settingBox.requestFocus();
        }

        foldersGridRecyclerView.clearFocus();


        root.transitionToState(R.id.settingsShowed);
    }

    private void showAddFolderBox(){
        if (!addFolderBox.hasFocus()){
            addFolderBox.requestFocus();
        }

        foldersGridRecyclerView.clearFocus();

        root.transitionToState(R.id.addFolderBoxShowed);
    }

这是我的图表文件：

<?xml version="1.0" encoding="utf-8"?>
<MotionScene xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <ConstraintSet android:id="@+id/addFolderBoxHidden">
        <Constraint
            android:id="@+id/addFolderBox"
            android:layout_width="match_parent"
            android:layout_height="330dp"
            android:layout_marginBottom="1dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:background="@drawable/add_folder_background"
            android:paddingHorizontal="17dp"
            app:layout_constraintBottom_toTopOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_default="percent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"/>

        <Constraint
            android:id="@+id/settingsBox"
            android:layout_width="match_parent"
            android:layout_height="600dp"
            android:layout_marginTop="1dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:background="@drawable/settings_bar_background"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="parent"
            android:translationZ="6dp"/>

    </ConstraintSet>

    <ConstraintSet android:id="@+id/addFolderBoxShowed">
        <Constraint
            android:id="@+id/addFolderBox"
            android:layout_width="match_parent"
            android:layout_height="330dp"
            android:layout_marginBottom="-330dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:background="@drawable/add_folder_background"
            android:paddingHorizontal="17dp"
            app:layout_constraintBottom_toTopOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_default="percent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"/>

        <Constraint
            android:id="@+id/settingsBox"
            android:layout_width="match_parent"
            android:layout_height="600dp"
            android:layout_marginTop="1dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:background="@drawable/settings_bar_background"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="parent"
            android:translationZ="6dp"/>
    </ConstraintSet>

    <ConstraintSet android:id="@+id/settingsHidden">
        <Constraint
            android:id="@+id/addFolderBox"
            android:layout_width="match_parent"
            android:layout_height="330dp"
            android:layout_marginBottom="1dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:background="@drawable/add_folder_background"
            android:paddingHorizontal="17dp"
            app:layout_constraintBottom_toTopOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_default="percent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"/>

        <Constraint
            android:id="@+id/settingsBox"
            android:layout_width="match_parent"
            android:layout_height="600dp"
            android:layout_marginTop="1dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:background="@drawable/settings_bar_background"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="parent"
            android:translationZ="6dp"/>
    </ConstraintSet>

    <ConstraintSet android:id="@+id/settingsShowed">
        <Constraint
            android:id="@+id/addFolderBox"
            android:layout_width="match_parent"
            android:layout_height="330dp"
            android:layout_marginBottom="1dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:background="@drawable/add_folder_background"
            android:paddingHorizontal="17dp"
            app:layout_constraintBottom_toTopOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_default="percent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"/>
        <Constraint
            android:id="@+id/settingsBox"
            android:layout_width="match_parent"
            android:layout_height="600dp"
            android:layout_marginTop="-600dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:background="@drawable/settings_bar_background"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="parent"
            android:translationZ="6dp"/>
    </ConstraintSet>

    <Transition
        app:constraintSetEnd="@+id/addFolderBoxHidden"
        app:constraintSetStart="@+id/addFolderBoxShowed" >
        <OnSwipe
            app:touchAnchorId="@id/addFolderBox"
            app:touchRegionId="@id/addFolderBox"
            app:dragDirection="dragUp"
            app:touchAnchorSide="bottom" />

    </Transition>

    <Transition
        app:constraintSetEnd="@+id/settingsHidden"
        app:constraintSetStart="@+id/settingsShowed" >
        <OnSwipe
            app:touchAnchorId="@id/settingsBox"
            app:touchRegionId="@id/settingsBox"
            app:dragDirection="dragDown"
            app:touchAnchorSide="top" />

    </Transition>

    <Transition
        app:constraintSetStart="@+id/addFolderBoxShowed"
        app:constraintSetEnd="@+id/addFolderBoxHidden">

    </Transition>

    <Transition
        app:constraintSetStart="@+id/settingsHidden"
        app:constraintSetEnd="@+id/settingsShowed">

    </Transition>

</MotionScene>

最后 activity 布局：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.motion.widget.MotionLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="?attr/backgroundColor"
    tools:context=".activities.MainActivity"
    app:layoutDescription="@xml/activity_main_scene">

<androidx.recyclerview.widget.RecyclerView
        android:id="@+id/group_grid_layout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:numColumns="2"
        android:visibility="visible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/constraintLayout">

    </androidx.recyclerview.widget.RecyclerView>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/addFolderBox"
        android:layout_width="match_parent"
        android:layout_height="330dp"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:layout_marginBottom="1dp"
        android:background="@drawable/add_folder_background"
        android:paddingHorizontal="17dp"
        app:layout_constraintBottom_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHeight_default="percent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"><.../>

<androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/settingsBox"
        android:layout_width="match_parent"
        android:layout_height="600dp"
        android:layout_marginTop="1dp"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:background="@drawable/settings_bar_background"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="parent"
        android:translationZ="6dp"></...>

在 onswipe 中尝试添加：

app:nestedScrollFlags="disableScroll"

这将告诉 MotionLayout 忽略 motionLayout 内的 RecyclerView (nestedScrollView)。

这可能就是您想要的行为。 您可能需要在顶部和底部有一些 UI 达到峰值。否则，您将始终获取 RecyclerView。 其他人在顶部和底部放置了不可见的视图以供抓取。

这只是解决这个问题的错误方法。

制作这样的东西的更好方法是制作这些面板 BottomSheetDialog 并禁用覆盖。