XiaoxintongSystemOS/app/src/main/res/layout/activity_details.xml

<?xml version="1.0" encoding="utf-8"?>
<layout 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"
    tools:context=".activity.DetailsActivity">

    <data>

    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/white">

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="0dp"
            app:layout_constraintBottom_toTopOf="@+id/ll_buy"
            app:layout_constraintTop_toTopOf="parent">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="0dp"
                app:layout_constraintBottom_toTopOf="@+id/ll_buy"
                app:layout_constraintTop_toTopOf="parent">

                <ImageView
                    android:id="@+id/iv_details"
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/dp_300"
                    android:adjustViewBounds="true"
                    android:scaleType="centerCrop"
                    app:layout_constraintTop_toTopOf="parent" />

                <ImageView
                    android:id="@+id/iv_exit"
                    android:layout_width="@dimen/dp_48"
                    android:layout_height="@dimen/dp_48"
                    android:layout_marginStart="@dimen/dp_8"
                    android:layout_marginTop="@dimen/dp_8"
                    android:src="@drawable/details_back"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:id="@+id/linearLayout6"
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/dp_48"
                    android:background="@color/title_red"
                    android:orientation="horizontal"
                    app:layout_constraintTop_toBottomOf="@+id/iv_details">

                    <TextView
                        android:id="@+id/tv_buying_price"
                        android:layout_width="wrap_content"
                        android:layout_height="@dimen/dp_48"
                        android:layout_weight="2"
                        android:gravity="center_vertical"
                        android:paddingStart="@dimen/dp_16"
                        android:text="￥"
                        android:textColor="@color/white"
                        android:textSize="@dimen/sp_28"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent" />

                    <TextView
                        android:id="@+id/tv_subsidy"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:background="@drawable/subsidy_bg"
                        android:textColor="@color/red"
                        android:textSize="@dimen/sp_16"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toStartOf="@+id/tv_stock"
                        app:layout_constraintStart_toEndOf="@+id/tv_buying_price"
                        app:layout_constraintTop_toTopOf="parent" />

                    <TextView
                        android:id="@+id/tv_stock"
                        android:layout_width="wrap_content"
                        android:layout_height="@dimen/dp_48"
                        android:layout_marginEnd="@dimen/dp_8"
                        android:layout_weight="1"
                        android:gravity="center_vertical"
                        android:text="库存"
                        android:textColor="@color/white"
                        android:textSize="@dimen/sp_18"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintTop_toTopOf="parent" />

                </androidx.constraintlayout.widget.ConstraintLayout>

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="@dimen/dp_8"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/linearLayout6">

                    <TextView
                        android:id="@+id/tv_type"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="@dimen/dp_2"
                        android:background="@drawable/class_bg"
                        android:maxLines="1"
                        android:text="品牌"
                        android:textColor="@color/white"
                        android:textSize="@dimen/sp_8"
                        app:layout_constraintBottom_toBottomOf="@+id/tv_title"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="@+id/tv_title" />

                    <TextView
                        android:id="@+id/tv_title"
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="@dimen/dp_4"
                        android:layout_marginTop="@dimen/dp_8"
                        android:maxLines="3"
                        android:textSize="@dimen/sp_16"
                        android:textStyle="bold"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toEndOf="@+id/tv_type"
                        app:layout_constraintTop_toTopOf="parent" />

                    <TextView
                        android:id="@+id/tv_details"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="@dimen/dp_8"
                        android:textSize="@dimen/sp_16"
                        app:layout_constraintTop_toBottomOf="@+id/tv_title" />

                    <ImageView
                        android:layout_width="match_parent"
                        android:layout_height="1px"
                        android:background="@color/gray"
                        app:layout_constraintBottom_toTopOf="@+id/imageView5" />

                    <ImageView
                        android:id="@+id/imageView5"
                        android:layout_width="@dimen/dp_24"
                        android:layout_height="@dimen/dp_24"
                        android:layout_marginTop="@dimen/dp_8"
                        android:adjustViewBounds="true"
                        android:scaleType="centerCrop"
                        android:src="@drawable/certified"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toBottomOf="@+id/tv_details" />

                    <TextView
                        android:id="@+id/tv_certified"
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="@dimen/dp_4"
                        android:textSize="@dimen/sp_14"
                        app:layout_constraintBottom_toBottomOf="@+id/imageView5"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toEndOf="@+id/imageView5"
                        app:layout_constraintTop_toTopOf="@+id/imageView5" />

                    <ImageView
                        android:layout_width="match_parent"
                        android:layout_height="1px"
                        android:background="@color/gray"
                        app:layout_constraintBottom_toTopOf="@+id/imageView7" />

                    <ImageView
                        android:id="@+id/imageView7"
                        android:layout_width="@dimen/dp_24"
                        android:layout_height="@dimen/dp_24"
                        android:layout_marginTop="@dimen/dp_8"
                        android:adjustViewBounds="true"
                        android:scaleType="centerCrop"
                        android:src="@drawable/ship"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toBottomOf="@+id/imageView5" />

                    <TextView
                        android:id="@+id/tv_ship"
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="@dimen/dp_4"
                        android:textSize="@dimen/sp_14"
                        app:layout_constraintBottom_toBottomOf="@+id/imageView7"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toEndOf="@+id/imageView7"
                        app:layout_constraintTop_toTopOf="@+id/imageView7" />

                    <ImageView
                        android:layout_width="match_parent"
                        android:layout_height="1px"
                        android:background="@color/gray"
                        app:layout_constraintBottom_toTopOf="@+id/imageView8" />

                    <ImageView
                        android:id="@+id/imageView8"
                        android:layout_width="@dimen/dp_24"
                        android:layout_height="@dimen/dp_24"
                        android:layout_marginTop="@dimen/dp_8"
                        android:adjustViewBounds="true"
                        android:scaleType="centerCrop"
                        android:src="@drawable/insurance"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toBottomOf="@+id/imageView7" />

                    <TextView
                        android:id="@+id/tv_insurance"
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="@dimen/dp_4"
                        android:textSize="@dimen/sp_14"
                        app:layout_constraintBottom_toBottomOf="@+id/imageView8"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toEndOf="@+id/imageView8"
                        app:layout_constraintTop_toTopOf="@+id/imageView8" />

                    <TextView
                        android:id="@+id/tv_sale"
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="@dimen/dp_8"
                        android:layout_marginBottom="@dimen/dp_16"
                        android:textSize="@dimen/sp_14"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toBottomOf="@+id/imageView8" />
                </androidx.constraintlayout.widget.ConstraintLayout>
            </androidx.constraintlayout.widget.ConstraintLayout>
        </ScrollView>

        <LinearLayout
            android:id="@+id/ll_buy"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            app:layout_constraintBottom_toBottomOf="parent">

            <TextView
                android:id="@+id/tv_original_price"
                android:layout_width="0dp"
                android:layout_height="@dimen/dp_48"
                android:layout_weight="1"
                android:background="@color/title_red2"
                android:gravity="center"
                android:text="￥0"
                android:textColor="@color/white"
                android:textSize="@dimen/sp_22" />

            <TextView
                android:id="@+id/tv_price"
                android:layout_width="0dp"
                android:layout_height="@dimen/dp_48"
                android:layout_weight="1"
                android:background="@color/title_red"
                android:gravity="center"
                android:text="￥0"
                android:textColor="@color/white"
                android:textSize="@dimen/sp_22" />
        </LinearLayout>
    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>