我在搜索最接近的问题是：Scrollview inside constraint layout does not scroll to the bottom of the parent constraint
但没有解决办法。
我要做的是：
我有一个3个“部分”的约束布局：顶部栏，中间内容和底部按钮。
我只想放一个中间内容的滚动视图。所以如果你上下滚动，你会看到顶部的条和底部的按钮
但是这个滚动视图不起作用，我认为它与滚动视图中的“match_parent”有关，但是我不能设置这个选项，因为滚动视图在约束布局中，大小应该是相对的，如果我设置match parent，它不会填充所有空格。
我已经在使用：
fillviewport=“真”，
layout_constraintbottom_tobottomof=“父级”
按照代码，滚动视图名称：“ScrollView2”
<?xml version="1.0" encoding="utf-8"?>
<!--Create by Canato 26/09/2017-->
<com.flipboard.bottomsheet.BottomSheetLayout 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/needs_search_bottomsheet"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteY="25dp"
tools:layout_editor_absoluteX="0dp">
<android.support.constraint.Guideline
android:id="@+id/horGuideline10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.1"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="82dp" />
<android.support.constraint.Guideline
android:id="@+id/horGuideline90"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.9"
tools:layout_editor_absoluteY="536dp"
tools:layout_editor_absoluteX="0dp" />
<include
android:id="@+id/actionbar"
layout="@layout/view_actionbar"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="@+id/horGuideline10"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<Button
android:id="@+id/needs_search_save_btn"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@drawable/btn_green_bright_half_round_selector"
android:gravity="center"
android:text="@string/str_continue_save"
android:textAllCaps="false"
android:textColor="@color/WHITE"
android:textSize="@dimen/size_text_button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/horGuideline90"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1" />
<ScrollView
android:id="@+id/scrollView2"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="0dp"
android:layout_marginTop="0dp"
android:fillViewport="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/horGuideline10">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="400dp">
<android.support.constraint.Guideline
android:id="@+id/verGuideline20"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.2"
tools:layout_editor_absoluteX="72dp"
tools:layout_editor_absoluteY="206dp" />
<android.support.constraint.Guideline
android:id="@+id/verGuideline55"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.55"
tools:layout_editor_absoluteX="198dp"
tools:layout_editor_absoluteY="206dp" />
<android.support.constraint.Guideline
android:id="@+id/verGuideline90"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.9"
tools:layout_editor_absoluteX="324dp"
tools:layout_editor_absoluteY="206dp" />
<android.support.constraint.Guideline
android:id="@+id/horGuideline10in"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.1"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="233dp" />
<android.support.constraint.Guideline
android:id="@+id/horGuideline20"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.2"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="260dp" />
<android.support.constraint.Guideline
android:id="@+id/horGuideline28"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.28"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="282dp" />
<android.support.constraint.Guideline
android:id="@+id/horGuideline38"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.38"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="309dp" />
<TextView
android:id="@+id/needs_search_title_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:text="@string/service_request_title_text"
android:textColor="@color/ANDROID_DARK_GRAY"
android:textSize="@dimen/title_text_size"
app:layout_constraintBaseline_toBaselineOf="@+id/needs_search_title_edit"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/verGuideline20" />
<EditText
android:id="@+id/needs_search_title_edit"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:ems="10"
android:hint="@string/service_request_title_explanation_text"
android:inputType="textPersonName"
android:textColorHint="@color/ANDROID_DARK_GRAY"
app:layout_constraintBottom_toTopOf="@+id/horGuideline10in"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/verGuideline20"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<ImageView
android:id="@+id/iconLocation"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:contentDescription="@string/service_request_location_icon_contentDescription"
app:layout_constraintBottom_toTopOf="@+id/horGuideline20"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/verGuideline20"
app:layout_constraintTop_toTopOf="@+id/horGuideline10in"
app:layout_constraintVertical_bias="0.454"
app:srcCompat="@drawable/ic_location_on_gray_24dp" />
<EditText
android:id="@+id/service_request_address_editText"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="8dp"
android:ems="10"
android:hint="@string/service_request_location_text"
android:inputType="textPersonName"
android:textColorHint="@color/ANDROID_DARK_GRAY"
android:textSize="@dimen/size_text_button"
app:layout_constraintLeft_toRightOf="@+id/iconLocation"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/horGuideline10in" />
<ImageView
android:id="@+id/iconDecribeText"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:contentDescription="@string/service_request_text_contentDescription"
app:layout_constraintBottom_toTopOf="@+id/horGuideline38"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/verGuideline20"
app:layout_constraintTop_toTopOf="@+id/horGuideline28"
app:srcCompat="@drawable/ic_short_text_gray_24dp" />
<EditText
android:id="@+id/needs_search_description_edit"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="8dp"
android:ems="10"
android:hint="@string/service_request_small_text_explanation"
android:inputType="textMultiLine"
android:textColorHint="@color/ANDROID_DARK_GRAY"
android:textSize="@dimen/size_text_button"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="@+id/verGuideline20"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/horGuideline28" />
<Button
android:id="@+id/needs_search_address_locate_btn"
android:layout_width="0dp"
android:layout_height="0dp"
android:alpha="0.5"
android:background="@android:drawable/dialog_holo_light_frame"
app:layout_constraintBottom_toTopOf="@+id/horGuideline28"
app:layout_constraintLeft_toLeftOf="@+id/verGuideline20"
app:layout_constraintRight_toLeftOf="@+id/verGuideline55"
app:layout_constraintTop_toTopOf="@+id/horGuideline20"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="@+id/needs_search_address_home_btn"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:alpha="0.5"
android:background="@android:drawable/dialog_holo_light_frame"
app:layout_constraintBottom_toTopOf="@+id/horGuideline28"
app:layout_constraintLeft_toLeftOf="@+id/verGuideline55"
app:layout_constraintRight_toLeftOf="@+id/verGuideline90"
app:layout_constraintTop_toTopOf="@+id/horGuideline20"
app:layout_constraintVertical_bias="0.0" />
<android.support.v7.widget.RecyclerView
android:id="@+id/needs_search_images_recyclerview"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="0dp"
android:layout_marginEnd="16dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="24dp"
android:focusable="false"
android:focusableInTouchMode="false"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/needs_search_description_edit"
tools:listitem="@layout/needs_search_big_image_list_item" />
</android.support.constraint.ConstraintLayout>
</ScrollView>
</android.support.constraint.ConstraintLayout>
</com.flipboard.bottomsheet.BottomSheetLayout>
最佳答案
嗯，我刚和一个朋友找到了解决方案，首先我想删除这个，但是由于其他人可能也有同样的问题，这里的解决方案是：
我只是删除所有的准则，然后重新构建，在不使用这么多准则的情况下连接元素。
有点幸运，因为我这样做是为了改变方向。
关于android - 约束布局中Scrollview内的Android约束布局，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46434139/