在自定义dialog中定义了布局，根布局用的ConstraintLayout 版本是1.0.2

<?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="wrap_content"
    android:layout_marginLeft="39dp"
    android:layout_marginRight="39dp"
    android:background="@drawable/shape_solidffffff_corners8">

    <ImageView
        android:id="@+id/close"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_alignParentRight="true"
        android:layout_marginTop="18dp"
        android:layout_marginRight="12dp"
        android:src="@mipmap/close"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/txt_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="20dp"
        android:text="标题"
        android:textColor="#141414"
        android:textSize="17sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toTopOf="@+id/txt_content"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/txt_content"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txt_title"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="30dp"
        android:layout_marginBottom="30dp"
        android:gravity="center"
        android:lineSpacingExtra="4dp"
        android:text="内容"
        android:textColor="#555555"
        android:textSize="15sp"
        app:layout_constraintBottom_toTopOf="@+id/txt_confirm"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/txt_title" />

    <TextView
        android:id="@+id/txt_confirm"
        android:layout_width="match_parent"
        android:layout_height="38dp"
        android:layout_below="@+id/txt_content"
        android:layout_marginLeft="50dp"
        android:layout_marginRight="50dp"
        android:layout_marginBottom="22dp"
        android:background="@drawable/shape_solidffb533_corners_round"
        android:gravity="center"
        android:text="@string/order_detail_confirm"
        android:textColor="@color/white"
        android:textSize="13sp"
        app:layout_constraintBottom_toBottomOf="parent" />
</android.support.constraint.ConstraintLayout>

预览效果：

image.png

不过在某些机型显示的效果不完整

image.png

升级ConstraintLayout 版本为1.1.2后显示正确

image.png