我尝试了这一切的组合，有些人说这是一个错误，但我认为这是我遗漏的一些小问题。使用以下 XML，我根本无法滚动，只能水平滚动。
我有一个横向滚动的 RecyclerView，我可以左右拖动它，但是页面中的 I 项多于容纳不下的内容，因此需要 ScrollView。
起初我的目标是一个可折叠的工具栏，但是当我添加 CoordinatorLayout 时， Activity 只是空白。
我的 XML:
<android.support.constraint.ConstraintLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:nestedScrollingEnabled="true"
app:layout_constraintTop_toBottomOf="@+id/scrollv"
tools:context="com.wearecatchapp.blueandwhite.catchapp_droid.EventDetailActivity">
<android.support.v7.widget.Toolbar
android:id="@+id/detail_toolbar"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#fff"
android:elevation="2dp"
android:minHeight="60dp"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_scrollFlags="scroll|enterAlwaysCollapsed"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/evt_title"
fontPath="fonts/PanameFY.otf"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="30sp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="2dp"
android:text="Organizer's level:"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="12sp" />
<ImageView
android:id="@+id/org_level"
android:layout_width="60dp"
android:layout_height="16dp"
android:layout_gravity="center_vertical" />
</LinearLayout>
<TextView
android:id="@+id/optional_title"
fontPath="fonts/PanameFY.otf"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="2dp"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="24sp"
android:visibility="gone" />
</LinearLayout>
</android.support.v7.widget.Toolbar>
<android.support.v4.widget.NestedScrollView
android:id="@+id/scrollv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="@+id/detail_toolbar">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/activity_image"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:srcCompat="@color/black" />
<TextView
android:id="@+id/month"
android:layout_width="70dp"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:text="NOV"
android:textAlignment="center"
android:textColor="@android:color/holo_red_light"
android:textSize="18sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/activity_image" />
<TextView
android:id="@+id/day"
android:layout_width="70dp"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="2dp"
android:text="15"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="24sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/month" />
<TextView
android:id="@+id/starts"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:text="Starts"
android:textColor="@color/black"
android:textSize="18sp"
app:layout_constraintLeft_toRightOf="@+id/month"
app:layout_constraintTop_toBottomOf="@+id/activity_image" />
<TextView
android:id="@+id/ends"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="7dp"
android:text="Ends"
android:textColor="@color/black"
android:textSize="18sp"
app:layout_constraintLeft_toRightOf="@+id/day"
app:layout_constraintTop_toBottomOf="@+id/starts" />
<TextView
android:id="@+id/start_date"
fontPath="fonts/AvenirNext-Medium.ttf"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="42dp"
android:layout_marginStart="42dp"
android:layout_marginTop="8dp"
android:text=" 18:10 Wed, Nov 15"
android:textColor="@color/black"
android:textSize="18sp"
app:layout_constraintLeft_toRightOf="@+id/starts"
app:layout_constraintTop_toBottomOf="@+id/activity_image" />
<TextView
android:id="@+id/textView34"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="50dp"
android:layout_marginStart="50dp"
android:layout_marginTop="7dp"
android:textColor="@color/black"
android:textSize="18sp"
app:layout_constraintLeft_toRightOf="@+id/ends"
app:layout_constraintTop_toBottomOf="@+id/start_date" />
<View
android:id="@+id/view10"
id="@+id/view8"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginTop="16dp"
android:background="@color/thegray"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/linearLayout2" />
<View
android:id="@+id/view9"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginTop="9dp"
android:background="@color/thegray"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView34" />
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="397dp"
android:layout_height="wrap_content"
android:layout_marginTop="25dp"
android:orientation="horizontal"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView34">
<ImageView
android:id="@+id/requests_image"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_weight="1"
app:srcCompat="@drawable/requestsicon" />
<ImageView
android:id="@+id/invite_image"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_weight="1"
app:srcCompat="@drawable/invitefriends" />
<ImageView
android:id="@+id/recommend_image"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_weight="1"
app:srcCompat="@drawable/recommend" />
<ImageView
android:id="@+id/share_image"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_weight="1"
app:srcCompat="@drawable/shareblue" />
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout2"
android:layout_width="396dp"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/linearLayout">
<TextView
android:id="@+id/requests_text"
fontPath="fonts/avenir-next-bold.ttf"
android:layout_width="24dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Requests"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="12sp" />
<TextView
android:id="@+id/invite_friends_text"
fontPath="fonts/avenir-next-bold.ttf"
android:layout_width="24dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Invite friends"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="12sp" />
<TextView
android:id="@+id/recommend_event_text"
fontPath="fonts/avenir-next-bold.ttf"
android:layout_width="24dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Recommend"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="12sp" />
<TextView
android:id="@+id/share_text"
fontPath="fonts/avenir-next-bold.ttf"
android:layout_width="24dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Share"
android:textAlignment="center"
android:textColor="@color/black"
android:textSize="12sp" />
</LinearLayout>
<TextView
android:id="@+id/status_text"
fontPath="fonts/avenir-next-bold.ttf"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:paddingLeft="8dp"
android:textColor="@color/dark_gray"
android:textSize="20sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view10" />
<ImageView
android:id="@+id/is_for"
android:layout_width="36dp"
android:layout_height="36dp"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="6dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/status_text"
app:srcCompat="@drawable/maleandfemale" />
<TextView
android:id="@+id/going"
fontPath="fonts/AvenirNext-Medium.ttf"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="15dp"
android:text="going"
android:textColor="@color/black"
app:layout_constraintLeft_toRightOf="@+id/is_for"
app:layout_constraintTop_toBottomOf="@+id/status_text" />
<TextView
android:id="@+id/more_togo"
fontPath="fonts/AvenirNext-Medium.ttf"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginStart="20dp"
android:layout_marginTop="15dp"
android:text="TextView"
android:textColor="@color/black"
app:layout_constraintLeft_toRightOf="@+id/hor_view"
app:layout_constraintTop_toBottomOf="@+id/status_text" />
<View
android:id="@+id/hor_view"
class="android.support.v4.widget.Space"
android:layout_width="1dp"
android:layout_height="30dp"
android:layout_marginLeft="35dp"
android:layout_marginStart="35dp"
android:layout_marginTop="8dp"
android:background="@color/dark_gray"
app:layout_constraintLeft_toRightOf="@+id/going"
app:layout_constraintTop_toBottomOf="@+id/status_text" />
<android.support.v7.widget.RecyclerView
android:id="@+id/participants_list"
android:layout_width="0dp"
android:layout_height="117dp"
android:layout_marginTop="12dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/hor_view" />
<View
android:id="@+id/view16"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginTop="8dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/participants_list" />
<TextView
android:id="@+id/textView47"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="17dp"
android:text="Costs"
android:textSize="18sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view16" />
<TextView
android:id="@+id/cost_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="17dp"
android:text="TextView"
android:textSize="18sp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view16" />
<View
android:id="@+id/view19"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginTop="55dp"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view16" />
<TextView
android:id="@+id/cost_title_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="13dp"
android:textSize="18sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view19" />
<View
android:id="@+id/view20"
android:layout_width="0dp"
android:layout_height="1px"
android:layout_marginTop="16dp"
android:background="@color/thegray"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view19" />
<ImageView
android:id="@+id/imageView15"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:padding="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view20"
app:srcCompat="@drawable/pinblue" />
<TextView
android:id="@+id/textView50"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="7dp"
android:layout_marginStart="7dp"
android:layout_marginTop="16dp"
android:text="Event location"
android:textColor="@color/colorPrimary"
android:textSize="18sp"
app:layout_constraintLeft_toRightOf="@+id/imageView15"
app:layout_constraintTop_toBottomOf="@+id/view20" />
<ImageView
android:id="@+id/imageView5"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:padding="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView50"
app:srcCompat="@drawable/background" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>
<android.support.v7.widget.CardView
android:layout_width="0dp"
android:layout_height="60dp"
android:layout_marginBottom="29dp"
android:layout_marginEnd="40dp"
android:layout_marginLeft="40dp"
android:layout_marginRight="40dp"
android:layout_marginStart="40dp"
app:cardBackgroundColor="@color/colorPrimary"
app:cardCornerRadius="18dp"
app:cardElevation="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|center_horizontal"
android:text="REQUEST TO JOIN"
android:textColor="@android:color/white"
android:textSize="14dp" />
</android.support.v7.widget.CardView>
</android.support.constraint.ConstraintLayout>
看在上帝的份上，有人请给我解释一下这狗屎。
最佳答案
尝试将 setNestedScrollingEnabled(false) 添加到您的内部 recyclerview。
https://developer.android.com/reference/android/support/v7/widget/RecyclerView.html
setNestedScrollingEnabled
Enable or disable nested scrolling for this view.
If this property is set to true the view will be permitted to initiate nested scrolling operations with a compatible parent view in the current hierarchy. If this view does not implement nested scrolling this will have no effect. Disabling nested scrolling while a nested scroll is in progress has the effect of stopping the nested scroll.
关于android - NestedScrollView 内的水平 RecyclerView，无法垂直滚动，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46869754/