ScrollView 中 ConstraintLayout 的奇怪行为
Strange behavior of ConstraintLayout in ScrollView
我使用的是最新版本的constraint layout(1.0.2)，遇到过此类问题（如下截图）：
如您所见，布局已从底部裁剪掉。此问题仅出现在 ScrollView 中，或者当我尝试将 ConstraintLayout 用作 RecyclerView 中的项目时：
在这两个示例中，ConstraintLayout 的 layout_height 为 wrap_content（首先是因为 ScrollView，其次 - 我只是需要它）。我在 ScrollView 中尝试了 android:fillViewport="true"，但它不起作用。我该如何解决这个问题？
布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:background="@android:color/white"
android:orientation="vertical">
<include
android:id="@+id/toolbar"
layout="@layout/widget_toolbar"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<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="wrap_content"
android:paddingBottom="8dp"
android:paddingTop="16dp">
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/iv_edit_profile_avatar"
android:layout_width="110dp"
android:layout_height="110dp"
android:contentDescription="@string/cd_avatar"
android:src="@drawable/ic_avatar_normal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"/>
<TextView
android:id="@+id/tv_edit_profile_photo_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="32dp"
android:fontFamily="@font/font_regular"
android:padding="8dp"
android:text="@string/edit_profile_photo_label"
android:textColor="@color/colorAccent"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/iv_edit_profile_avatar"/>
<TextView
android:id="@+id/tv_edit_profile_name_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_name_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_edit_profile_photo_label"/>
<EditText
android:id="@+id/et_edit_profile_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:fontFamily="@font/font_regular"
android:imeOptions="actionNext"
android:inputType="textPersonName"
android:maxLength="25"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_name_label"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_name_label"
tools:text="Name"/>
<View
android:id="@+id/view"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_name"/>
<TextView
android:id="@+id/tv_edit_profile_username_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/all_username_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view"/>
<EditText
android:id="@+id/et_edit_profile_username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:drawableEnd="@drawable/ic_correct"
android:fontFamily="@font/font_regular"
android:imeOptions="actionNext"
android:inputType="textPersonName"
android:maxLength="20"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_username_label"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_username_label"
tools:text="Username"/>
<View
android:id="@+id/view2"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_username"/>
<TextView
android:id="@+id/tv_edit_profile_bio_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_bio_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/et_edit_profile_bio"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="@+id/et_edit_profile_bio"/>
<EditText
android:id="@+id/et_edit_profile_bio"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:layout_marginTop="16dp"
android:capitalize="sentences"
android:fontFamily="@font/font_regular"
android:imeOptions="actionNone"
android:inputType="textMultiLine|textCapSentences"
android:maxLines="5"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view2"
tools:text="Bioa lnmgkjn \n gkdnfmk.g .kfm kfmn mmhh lkm hklgk mngk \n nmgk mnkgnmh kjgnmh kgjnm hkgnm"/>
<View
android:id="@+id/view3"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_bio"/>
<FrameLayout
android:id="@+id/block_car_add_location"
android:layout_width="match_parent"
android:layout_height="@dimen/_40sdp"
android:paddingEnd="16dp"
android:paddingStart="16dp"
app:layout_constraintTop_toBottomOf="@+id/view3">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:fontFamily="@font/font_regular"
android:text="@string/add_car_location"
android:textSize="14sp"/>
<TextView
android:id="@+id/tv_car_location"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginEnd="32dp"
android:layout_marginStart="@dimen/_76sdp"
android:fontFamily="@font/font_regular"
android:maxLength="25"
android:singleLine="true"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|end"
android:contentDescription="@string/cd_arrow"
android:src="@drawable/ic_arrow_right"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="bottom"
android:background="@color/colorStroke"/>
</FrameLayout>
<TextView
android:id="@+id/tv_edit_profile_currency_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_currency_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/block_car_add_location"/>
<EditText
android:id="@+id/et_edit_profile_currency"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:ems="12"
android:fontFamily="@font/font_regular"
android:inputType="text"
android:maxLength="3"
android:text="@string/all_currency_usd"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_currency_label"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_currency_label"/>
<View
android:id="@+id/view4"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_currency"/>
<TextView
android:id="@+id/tv_edit_profile_mileage_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_mileage_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view4"/>
<Spinner
android:id="@+id/spinner_edit_profile_mileage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="@dimen/_90sdp"
android:fontFamily="@font/font_regular"
android:paddingEnd="0dp"
android:paddingStart="0dp"
android:prompt="@string/all_mileage_km"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_mileage_label"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_mileage_label"/>
<View
android:id="@+id/view5"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/spinner_edit_profile_mileage"/>
<FrameLayout
android:id="@+id/tv_edit_profile_password"
android:layout_width="match_parent"
android:layout_height="@dimen/_40sdp"
android:paddingEnd="16dp"
android:paddingStart="16dp"
app:layout_constraintTop_toBottomOf="@+id/view5">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_change_pass_label"
android:textColor="@color/colorAccent"
android:textSize="14sp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|end"
android:contentDescription="@string/cd_arrow"
android:src="@drawable/ic_arrow_right"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="bottom"
android:background="@color/colorStroke"/>
</FrameLayout>
<FrameLayout
android:id="@+id/tv_edit_profile_logout"
android:layout_width="match_parent"
android:layout_height="@dimen/_40sdp"
android:paddingEnd="16dp"
android:paddingStart="16dp"
app:layout_constraintTop_toBottomOf="@+id/tv_edit_profile_password">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_change_logout_label"
android:textColor="@color/colorAccent"
android:textSize="14sp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|end"
android:contentDescription="@string/cd_arrow"
android:src="@drawable/ic_arrow_right"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="bottom"
android:background="@color/colorStroke"/>
</FrameLayout>
<TextView
android:id="@+id/tv_edit_profile_details_label"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:background="@color/colorStroke"
android:fontFamily="@font/font_regular"
android:paddingBottom="12dp"
android:paddingEnd="0dp"
android:paddingStart="16dp"
android:paddingTop="12dp"
android:text="@string/edit_profile_details_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_edit_profile_logout"/>
<TextView
android:id="@+id/tv_edit_profile_email_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/all_email_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/et_edit_profile_email"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="@+id/et_edit_profile_email"/>
<EditText
android:id="@+id/et_edit_profile_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:inputType="textEmailAddress"
android:maxLength="200"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_edit_profile_details_label"
tools:text="some@mail.com"/>
<View
android:id="@+id/view7"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_email"/>
<TextView
android:id="@+id/tv_edit_profile_phone_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/all_phone_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/et_edit_profile_phone"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="@+id/et_edit_profile_phone"/>
<EditText
android:id="@+id/et_edit_profile_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:inputType="phone"
android:maxLength="17"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_email"
tools:text="+38 066 249 52 76"/>
<View
android:id="@+id/view8"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_phone"/>
<TextView
android:id="@+id/tv_edit_profile_remove_acc_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_remove_acc_label"
android:textColor="@color/colorPrimaryText"
android:textSize="12sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view8"/>
<Button
android:id="@+id/but_edit_profile_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:width="@dimen/_64sdp"
android:height="@dimen/_24sdp"
android:background="@drawable/shape_gray_stroked"
android:fontFamily="@font/font_bold"
android:minHeight="@dimen/_24sdp"
android:minWidth="@dimen/_64sdp"
android:padding="0dp"
android:text="@string/all_delete_but"
android:textAllCaps="false"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_remove_acc_label"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_remove_acc_label"/>
</android.support.constraint.ConstraintLayout>
</ScrollView>
</LinearLayout>
您的 Button 底部受 TextView 底部限制。与View android:id="@+id/view8"的底部进一步匹配。但是你View的bottom跟bottom不匹配。我在 recyclerview 中遇到了同样的问题，最后 child 的底部与 parent 约束布局不匹配。试试这个：
<TextView
android:id="@+id/tv_edit_profile_remove_acc_label"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_remove_acc_label"
android:textColor="@color/colorPrimaryText"
android:textSize="12sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view8"
app:layout_constraintBottom_toBottomOf="parent"/>
祝你好运:D
我使用的是最新版本的constraint layout(1.0.2)，遇到过此类问题（如下截图）：
如您所见，布局已从底部裁剪掉。此问题仅出现在 ScrollView 中，或者当我尝试将 ConstraintLayout 用作 RecyclerView 中的项目时：
在这两个示例中，ConstraintLayout 的 layout_height 为 wrap_content（首先是因为 ScrollView，其次 - 我只是需要它）。我在 ScrollView 中尝试了 android:fillViewport="true"，但它不起作用。我该如何解决这个问题？
布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:background="@android:color/white"
android:orientation="vertical">
<include
android:id="@+id/toolbar"
layout="@layout/widget_toolbar"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<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="wrap_content"
android:paddingBottom="8dp"
android:paddingTop="16dp">
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/iv_edit_profile_avatar"
android:layout_width="110dp"
android:layout_height="110dp"
android:contentDescription="@string/cd_avatar"
android:src="@drawable/ic_avatar_normal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"/>
<TextView
android:id="@+id/tv_edit_profile_photo_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="32dp"
android:fontFamily="@font/font_regular"
android:padding="8dp"
android:text="@string/edit_profile_photo_label"
android:textColor="@color/colorAccent"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/iv_edit_profile_avatar"/>
<TextView
android:id="@+id/tv_edit_profile_name_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_name_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_edit_profile_photo_label"/>
<EditText
android:id="@+id/et_edit_profile_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:fontFamily="@font/font_regular"
android:imeOptions="actionNext"
android:inputType="textPersonName"
android:maxLength="25"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_name_label"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_name_label"
tools:text="Name"/>
<View
android:id="@+id/view"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_name"/>
<TextView
android:id="@+id/tv_edit_profile_username_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/all_username_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view"/>
<EditText
android:id="@+id/et_edit_profile_username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:drawableEnd="@drawable/ic_correct"
android:fontFamily="@font/font_regular"
android:imeOptions="actionNext"
android:inputType="textPersonName"
android:maxLength="20"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_username_label"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_username_label"
tools:text="Username"/>
<View
android:id="@+id/view2"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_username"/>
<TextView
android:id="@+id/tv_edit_profile_bio_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_bio_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/et_edit_profile_bio"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="@+id/et_edit_profile_bio"/>
<EditText
android:id="@+id/et_edit_profile_bio"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:layout_marginTop="16dp"
android:capitalize="sentences"
android:fontFamily="@font/font_regular"
android:imeOptions="actionNone"
android:inputType="textMultiLine|textCapSentences"
android:maxLines="5"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view2"
tools:text="Bioa lnmgkjn \n gkdnfmk.g .kfm kfmn mmhh lkm hklgk mngk \n nmgk mnkgnmh kjgnmh kgjnm hkgnm"/>
<View
android:id="@+id/view3"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_bio"/>
<FrameLayout
android:id="@+id/block_car_add_location"
android:layout_width="match_parent"
android:layout_height="@dimen/_40sdp"
android:paddingEnd="16dp"
android:paddingStart="16dp"
app:layout_constraintTop_toBottomOf="@+id/view3">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:fontFamily="@font/font_regular"
android:text="@string/add_car_location"
android:textSize="14sp"/>
<TextView
android:id="@+id/tv_car_location"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginEnd="32dp"
android:layout_marginStart="@dimen/_76sdp"
android:fontFamily="@font/font_regular"
android:maxLength="25"
android:singleLine="true"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|end"
android:contentDescription="@string/cd_arrow"
android:src="@drawable/ic_arrow_right"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="bottom"
android:background="@color/colorStroke"/>
</FrameLayout>
<TextView
android:id="@+id/tv_edit_profile_currency_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_currency_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/block_car_add_location"/>
<EditText
android:id="@+id/et_edit_profile_currency"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:ems="12"
android:fontFamily="@font/font_regular"
android:inputType="text"
android:maxLength="3"
android:text="@string/all_currency_usd"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_currency_label"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_currency_label"/>
<View
android:id="@+id/view4"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_currency"/>
<TextView
android:id="@+id/tv_edit_profile_mileage_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_mileage_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view4"/>
<Spinner
android:id="@+id/spinner_edit_profile_mileage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="@dimen/_90sdp"
android:fontFamily="@font/font_regular"
android:paddingEnd="0dp"
android:paddingStart="0dp"
android:prompt="@string/all_mileage_km"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_mileage_label"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_mileage_label"/>
<View
android:id="@+id/view5"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/spinner_edit_profile_mileage"/>
<FrameLayout
android:id="@+id/tv_edit_profile_password"
android:layout_width="match_parent"
android:layout_height="@dimen/_40sdp"
android:paddingEnd="16dp"
android:paddingStart="16dp"
app:layout_constraintTop_toBottomOf="@+id/view5">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_change_pass_label"
android:textColor="@color/colorAccent"
android:textSize="14sp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|end"
android:contentDescription="@string/cd_arrow"
android:src="@drawable/ic_arrow_right"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="bottom"
android:background="@color/colorStroke"/>
</FrameLayout>
<FrameLayout
android:id="@+id/tv_edit_profile_logout"
android:layout_width="match_parent"
android:layout_height="@dimen/_40sdp"
android:paddingEnd="16dp"
android:paddingStart="16dp"
app:layout_constraintTop_toBottomOf="@+id/tv_edit_profile_password">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_change_logout_label"
android:textColor="@color/colorAccent"
android:textSize="14sp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|end"
android:contentDescription="@string/cd_arrow"
android:src="@drawable/ic_arrow_right"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="bottom"
android:background="@color/colorStroke"/>
</FrameLayout>
<TextView
android:id="@+id/tv_edit_profile_details_label"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:background="@color/colorStroke"
android:fontFamily="@font/font_regular"
android:paddingBottom="12dp"
android:paddingEnd="0dp"
android:paddingStart="16dp"
android:paddingTop="12dp"
android:text="@string/edit_profile_details_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_edit_profile_logout"/>
<TextView
android:id="@+id/tv_edit_profile_email_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/all_email_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/et_edit_profile_email"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="@+id/et_edit_profile_email"/>
<EditText
android:id="@+id/et_edit_profile_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:inputType="textEmailAddress"
android:maxLength="200"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_edit_profile_details_label"
tools:text="some@mail.com"/>
<View
android:id="@+id/view7"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_email"/>
<TextView
android:id="@+id/tv_edit_profile_phone_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/all_phone_label"
android:textColor="@color/colorSecondaryText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="@+id/et_edit_profile_phone"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="@+id/et_edit_profile_phone"/>
<EditText
android:id="@+id/et_edit_profile_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="@dimen/_90sdp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:inputType="phone"
android:maxLength="17"
android:textColor="@color/colorPrimaryText"
android:textSize="14sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_email"
tools:text="+38 066 249 52 76"/>
<View
android:id="@+id/view8"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="@dimen/_4sdp"
android:background="@color/colorStroke"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_edit_profile_phone"/>
<TextView
android:id="@+id/tv_edit_profile_remove_acc_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_remove_acc_label"
android:textColor="@color/colorPrimaryText"
android:textSize="12sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view8"/>
<Button
android:id="@+id/but_edit_profile_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:width="@dimen/_64sdp"
android:height="@dimen/_24sdp"
android:background="@drawable/shape_gray_stroked"
android:fontFamily="@font/font_bold"
android:minHeight="@dimen/_24sdp"
android:minWidth="@dimen/_64sdp"
android:padding="0dp"
android:text="@string/all_delete_but"
android:textAllCaps="false"
app:layout_constraintBottom_toBottomOf="@+id/tv_edit_profile_remove_acc_label"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/tv_edit_profile_remove_acc_label"/>
</android.support.constraint.ConstraintLayout>
</ScrollView>
</LinearLayout>
您的 Button 底部受 TextView 底部限制。与View android:id="@+id/view8"的底部进一步匹配。但是你View的bottom跟bottom不匹配。我在 recyclerview 中遇到了同样的问题，最后 child 的底部与 parent 约束布局不匹配。试试这个：
<TextView
android:id="@+id/tv_edit_profile_remove_acc_label"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:fontFamily="@font/font_regular"
android:text="@string/edit_profile_remove_acc_label"
android:textColor="@color/colorPrimaryText"
android:textSize="12sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/view8"
app:layout_constraintBottom_toBottomOf="parent"/>
祝你好运:D