Android 如何使按钮与底部的CardView重叠

我正在创建一个显示公告的应用程序，我想添加一个登录名。我正在尝试做这个XML设计。 我希望按钮在底部和中心重叠卡片视图。 如果有必要，我将更改文件的根目录

以下是我的XML代码：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    android:background="#fff"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.crescendo.lldm.crescendo.A_Login">

    <RelativeLayout
        android:id="@+id/rl_one_login"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <View
            android:id="@+id/v_one_login"
            android:background="@drawable/gradient_background_one"
            android:layout_width="match_parent"
            android:layout_height="300dp" />

        <RelativeLayout
            android:layout_marginTop="90dp"
            android:id="@+id/rl_two_login"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:textStyle="bold"
                android:id="@+id/tv_one_login"
                android:textSize="32sp"
                android:textAlignment="center"
                android:textColor="@color/colorWhite"
                android:text="C R E S C E N D O"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />

            <TextView
                android:layout_below="@+id/tv_one_login"
                android:textSize="15sp"
                android:textAlignment="center"
                android:textColor="@color/colorWhite"
                android:text="FOR THE USA MONUMENTAL CHOIR"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />

        </RelativeLayout>

    </RelativeLayout>

    <android.support.v7.widget.CardView
        app:cardUseCompatPadding="false"
        app:cardPreventCornerOverlap="false"
        android:id="@+id/cv_one_login"
        app:cardBackgroundColor="#fcfcfc"
        android:layout_marginTop="240dp"
        card_view:cardElevation="10dp"
        app:cardCornerRadius="10dp"
        android:elevation="10dp"
        android:layout_centerHorizontal="true"
        android:layout_width="360dp"
        android:layout_height="280dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        </RelativeLayout>

    </android.support.v7.widget.CardView>

    <Button
        android:layout_marginTop="197dp"
        android:layout_below="@+id/rl_one_login"
        android:layout_centerHorizontal="true"
        android:elevation="15dp"
        app:backgroundTint="@color/colorPrimary"
        android:layout_width="250dp"
        android:layout_height="50dp" />

</RelativeLayout>

希望有解决办法。谢谢大家!
 使用下面的代码根据按钮高度调整边距。我已将其设置为-25dp，因为它的高度为50dp

  <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout
        android:background="#fff"
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:card_view="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.crescendo.lldm.crescendo.A_Login">

        <RelativeLayout
            android:id="@+id/rl_one_login"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <View
                android:id="@+id/v_one_login"
                android:background="@drawable/gradient_background_one"
                android:layout_width="match_parent"
                android:layout_height="300dp" />

            <RelativeLayout
                android:layout_marginTop="90dp"
                android:id="@+id/rl_two_login"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:textStyle="bold"
                    android:id="@+id/tv_one_login"
                    android:textSize="32sp"
                    android:textAlignment="center"
                    android:textColor="@color/colorWhite"
                    android:text="C R E S C E N D O"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" />

                <TextView
                    android:layout_below="@+id/tv_one_login"
                    android:textSize="15sp"
                    android:textAlignment="center"
                    android:textColor="@color/colorWhite"
                    android:text="FOR THE USA MONUMENTAL CHOIR"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" />

            </RelativeLayout>

        </RelativeLayout>

        <android.support.v7.widget.CardView
            app:cardUseCompatPadding="false"
            app:cardPreventCornerOverlap="false"
            android:id="@+id/cv_one_login"
            app:cardBackgroundColor="#fcfcfc"
            android:layout_marginTop="240dp"
            card_view:cardElevation="10dp"
            app:cardCornerRadius="10dp"
            android:elevation="10dp"
            android:layout_centerHorizontal="true"
            android:layout_width="360dp"
            android:layout_height="280dp">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

            </RelativeLayout>

        </android.support.v7.widget.CardView>

        <Button        
            android:layout_below="@id/cv_one_login"
            android:layout_centerHorizontal="true"
            android:elevation="15dp"
            android:layout_marginTop="-25dp"
            app:backgroundTint="@color/colorPrimary"
            android:layout_width="250dp"
            android:layout_height="50dp" />

    </RelativeLayout>


试试下面的布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:card_view="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


    <View
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:background="@color/colorAccent" />

    <RelativeLayout
        android:id="@+id/rl_two_login"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="90dp">

        <TextView
            android:id="@+id/tv_one_login"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="C R E S C E N D O"
            android:textAlignment="center"
            android:textColor="#ffffff"
            android:textSize="32sp"
            android:textStyle="bold" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/tv_one_login"
            android:text="FOR THE USA MONUMENTAL CHOIR"
            android:textAlignment="center"
            android:textColor="#ffffff"
            android:textSize="15sp" />

    </RelativeLayout>

    <LinearLayout
        android:layout_marginTop="-50dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">


            <android.support.v7.widget.CardView
                android:id="@+id/cv_one_login"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_marginTop="240dp"
                android:elevation="10dp"
                app:cardBackgroundColor="#fcfcfc"
                app:cardCornerRadius="10dp"
                app:cardElevation="10dp"
                app:cardPreventCornerOverlap="false"
                app:cardUseCompatPadding="true">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:padding="10dp"
                        android:text="Nilu" />

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:padding="10dp"
                        android:text="Nilu" />

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:padding="10dp"
                        android:text="Nilu" />


                </LinearLayout>

            </android.support.v7.widget.CardView>
        </RelativeLayout>

        <Button
            android:layout_width="250dp"
            android:layout_height="50dp"
            android:layout_below="@id/cv_one_login"
            android:layout_centerHorizontal="true"
            android:layout_gravity="center"
            android:layout_marginTop="-35dp"
            android:elevation="15dp" />


    </LinearLayout>

</RelativeLayout>


试试这个

输出





custom_circle.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
    <corners android:radius="50dp" />
    <solid android:color="@color/colorPrimary" />

</shape>

使用和“设计”选项卡可以非常轻松地完成此操作

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">

    <android.support.v7.widget.CardView
        android:id="@+id/credentials_card"
        android:layout_width="150dp"
        android:layout_height="250dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.281">

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <EditText
                android:id="@+id/username_field"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="48dp"
                android:hint="Username"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.511"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <EditText
                android:id="@+id/passworld_field"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:hint="Password"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/username_field" />

        </android.support.constraint.ConstraintLayout>
    </android.support.v7.widget.CardView>

    <Button
        android:id="@+id/login_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:text="Login!"
        app:layout_constraintBottom_toBottomOf="@+id/credentials_card"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/credentials_card" />

</android.support.constraint.ConstraintLayout>


下面是代码，但我在“设计”选项卡中完成了大部分操作

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">

    <android.support.v7.widget.CardView
        android:id="@+id/credentials_card"
        android:layout_width="150dp"
        android:layout_height="250dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.281">

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <EditText
                android:id="@+id/username_field"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="48dp"
                android:hint="Username"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.511"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <EditText
                android:id="@+id/passworld_field"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:hint="Password"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/username_field" />

        </android.support.constraint.ConstraintLayout>
    </android.support.v7.widget.CardView>

    <Button
        android:id="@+id/login_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:text="Login!"
        app:layout_constraintBottom_toBottomOf="@+id/credentials_card"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/credentials_card" />

</android.support.constraint.ConstraintLayout>




这里是后台登录

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient
            android:angle="225"
            android:startColor="@color/colorBlue"
            android:endColor="#21d6d3" />
</shape>

使用ConstraintLayout此问题可以解决：

<?xml version="1.0" encoding="utf-8"?>
<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:background="@android:color/white">

    <View
        android:id="@+id/view_blank"
        android:layout_width="match_parent"
        android:layout_height="260dp"
        android:background="@color/colorPrimary"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

    <ImageView
        android:id="@+id/image_logo"
        android:layout_width="90dp"
        android:layout_height="90dp"
        android:layout_marginTop="80dp"
        android:src="@drawable/ic_action_facebook"
        android:tint="@android:color/white"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>


    <android.support.constraint.ConstraintLayout
        android:id="@+id/credentials_card"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_marginTop="20dp"
        android:padding="@dimen/spacing_mlarge"
        app:layout_constraintTop_toBottomOf="@+id/image_logo"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent">


        <android.support.v7.widget.CardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/spacing_medium"
            android:visibility="visible"
            app:cardUseCompatPadding="true"
            app:cardCornerRadius="6dp"
            app:cardElevation="5dp"
            tools:ignore="MissingConstraints">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:padding="@dimen/spacing_xmlarge">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:layout_marginBottom="25dp"
                    android:text="SIGN IN"
                    android:textAppearance="@style/Base.TextAppearance.AppCompat.Large"
                    android:textColor="@color/colorAccent"
                    android:textStyle="bold" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="USERNAME"
                    android:textAlignment="center"
                    android:textAppearance="@style/Base.TextAppearance.AppCompat.Caption"
                    android:textColor="@color/colorPrimary" />

                <android.support.design.widget.TextInputEditText
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:inputType="text"
                    android:maxLength="50"
                    android:maxLines="1"
                    android:singleLine="true"
                    android:textAppearance="@style/Base.TextAppearance.AppCompat.Large"
                    android:textColor="@color/colorPrimary"
                    android:textStyle="bold"
                    android:theme="@style/EditText.Grey" />


                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="20dp"
                    android:text="PASSWORD"
                    android:textAlignment="center"
                    android:textAppearance="@style/Base.TextAppearance.AppCompat.Caption"
                    android:textColor="@color/colorPrimary" />

                <android.support.design.widget.TextInputEditText
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:inputType="textPassword"
                    android:maxLength="50"
                    android:maxLines="1"
                    android:singleLine="true"
                    android:textAppearance="@style/Base.TextAppearance.AppCompat.Large"
                    android:textColor="@color/colorPrimary"
                    android:textStyle="bold"
                    android:theme="@style/EditText.Grey" />


            </LinearLayout>

        </android.support.v7.widget.CardView>

    </android.support.constraint.ConstraintLayout>

    <Button
        android:id="@+id/sign_up"
        android:layout_width="match_parent"
        android:layout_height="57dp"
        android:layout_marginLeft="50dp"
        android:layout_marginRight="50dp"
        android:background="@drawable/btn_rounded_primary"
        android:text="S I G N  I N"
        android:textAllCaps="false"
        android:textColor="@android:color/white"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="@+id/credentials_card"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"/>


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:layout_marginTop="20dp"
        android:text="FORGET PASSWORD"
        android:textAppearance="@style/Base.TextAppearance.AppCompat.Subhead"
        android:textColor="@color/grey_40"
        android:textStyle="bold"
        app:layout_constraintTop_toBottomOf="@+id/sign_up"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"/>


</android.support.constraint.ConstraintLayout>

以下是dimens.xml文件：

<!--genaral spacing-->
<dimen name="spacing_xsmall">2dp</dimen>
<dimen name="spacing_small">3dp</dimen>
<dimen name="spacing_medium">5dp</dimen>
<dimen name="spacing_xmedium">7dp</dimen>
<dimen name="spacing_middle">10dp</dimen>
<dimen name="spacing_large">15dp</dimen>
<dimen name="spacing_smlarge">18dp</dimen>
<dimen name="spacing_mlarge">20dp</dimen>
<dimen name="spacing_mxlarge">25dp</dimen>
<dimen name="spacing_xlarge">35dp</dimen>
<dimen name="spacing_xmlarge">40dp</dimen>
<dimen name="spacing_xxlarge">50dp</dimen>
<dimen name="spacing_xxxlarge">55dp</dimen>
<dimen name="appbar_padding_top">8dp</dimen>


2dp
3dp
5dp
7dp
10dp
15dp
18dp
20dp
25dp
35dp
40dp
50dp
55dp
8dp

colors.xml

<color name="grey_3">#f7f7f7</color>
<color name="grey_5">#f2f2f2</color>
<color name="grey_10">#e6e6e6</color>
<color name="grey_20">#cccccc</color>
<color name="grey_40">#999999</color>
<color name="grey_60">#666666</color>
<color name="grey_80">#37474F</color>
<color name="grey_90">#263238</color>

#f7f7f7
#f2f2f2
#E6E6
#中交
#999999
#666666
#37474F
#263238

使用ConstraintLayout:

我已经阅读了这里的每一个答案，出于以下动机，我放弃了每一个答案

我不想使用负边距，这是不推荐的
我不想使用用户
LinearLayout
其他答案对我不起作用
因此，最后我解决了我的问题，只需将
按钮
包装到另一个
ConstraintLayout
中，并向该
ConstraintLayout
添加一些
elevation

这是我的结果


这是一个工作样本

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.card.MaterialCardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            android:layout_marginEnd="16dp"
            android:layout_marginBottom="28dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:paddingBottom="28dp">

                <ImageView
                    android:id="@+id/user_avatar"
                    android:layout_width="0dp"
                    android:layout_height="92dp"
                    android:layout_marginTop="16dp"
                    android:layout_marginBottom="16dp"
                    android:src="@drawable/sample_food_1"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintWidth_percent="0.4" />

                <TextView
                    android:id="@+id/user_name"
                    style="?attr/textAppearanceHeadline4"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="16dp"
                    android:gravity="center"
                    android:maxLines="2"
                    android:text="Lorem ipsum lorem ipsum"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/user_avatar" />

                <TextView
                    android:id="@+id/user_description"
                    style="?attr/textAppearanceSubtitle1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:maxLines="2"
                    android:text="Lorem ipsum lorem ipsum"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/user_name" />

            </androidx.constraintlayout.widget.ConstraintLayout>

        </com.google.android.material.card.MaterialCardView>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:elevation="10dp"
            android:paddingStart="16dp"
            android:paddingEnd="16dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent">

            <Button
                android:id="@+id/button_edit_profile"
                android:layout_width="0dp"
                android:layout_height="56dp"
                android:layout_marginStart="16dp"
                android:layout_marginEnd="8dp"
                android:text="Some Button!!"
                app:layout_constraintEnd_toStartOf="@id/button_saved_videos"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <Button
                android:id="@+id/button_saved_videos"
                android:layout_width="0dp"
                android:layout_height="56dp"
                android:layout_marginStart="8dp"
                android:layout_marginEnd="16dp"
                android:text="Some Button!!"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toEndOf="@id/button_edit_profile"
                app:layout_constraintTop_toTopOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.constraintlayout.widget.ConstraintLayout>


您可以使用框架布局或带有负上边距按钮底视图的相对布局。但请记住，在棒棒糖下面，您必须提供底部按钮视图高程，而不是卡片视图，这在使用约束布局时最有效。这正是我要找的。但我无法添加此按钮的高程。
<color name="grey_3">#f7f7f7</color>
<color name="grey_5">#f2f2f2</color>
<color name="grey_10">#e6e6e6</color>
<color name="grey_20">#cccccc</color>
<color name="grey_40">#999999</color>
<color name="grey_60">#666666</color>
<color name="grey_80">#37474F</color>
<color name="grey_90">#263238</color>

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.card.MaterialCardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            android:layout_marginEnd="16dp"
            android:layout_marginBottom="28dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:paddingBottom="28dp">

                <ImageView
                    android:id="@+id/user_avatar"
                    android:layout_width="0dp"
                    android:layout_height="92dp"
                    android:layout_marginTop="16dp"
                    android:layout_marginBottom="16dp"
                    android:src="@drawable/sample_food_1"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintWidth_percent="0.4" />

                <TextView
                    android:id="@+id/user_name"
                    style="?attr/textAppearanceHeadline4"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="16dp"
                    android:gravity="center"
                    android:maxLines="2"
                    android:text="Lorem ipsum lorem ipsum"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/user_avatar" />

                <TextView
                    android:id="@+id/user_description"
                    style="?attr/textAppearanceSubtitle1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:maxLines="2"
                    android:text="Lorem ipsum lorem ipsum"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/user_name" />

            </androidx.constraintlayout.widget.ConstraintLayout>

        </com.google.android.material.card.MaterialCardView>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:elevation="10dp"
            android:paddingStart="16dp"
            android:paddingEnd="16dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent">

            <Button
                android:id="@+id/button_edit_profile"
                android:layout_width="0dp"
                android:layout_height="56dp"
                android:layout_marginStart="16dp"
                android:layout_marginEnd="8dp"
                android:text="Some Button!!"
                app:layout_constraintEnd_toStartOf="@id/button_saved_videos"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <Button
                android:id="@+id/button_saved_videos"
                android:layout_width="0dp"
                android:layout_height="56dp"
                android:layout_marginStart="8dp"
                android:layout_marginEnd="16dp"
                android:text="Some Button!!"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toEndOf="@id/button_edit_profile"
                app:layout_constraintTop_toTopOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.constraintlayout.widget.ConstraintLayout>