ConstraintLayout ignores margins

Question

I have very simple layout, which can be replaced with one RelativeLayout which always work. However wherever I put margins they are ignored and no, I don't want to use padding and no, chain also doesn't fix the problem. Any idea?

For example margins on date or manufacturer are ignored as well as others.

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="8dp"
    android:padding="8dp"
    app:cardBackgroundColor="?attr/szykColorSecondary"
    app:cardCornerRadius="8dp"
    app:cardElevation="4dp">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="8dp">

        <TextView
            android:id="@+id/date"
            style="?attr/szyk_textMedium"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginBottom="32dp"
            android:gravity="left"
            android:singleLine="true"
            android:text="16.12.2014"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/manufacturer"
            style="?attr/szyk_textBody"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="32dp"
            android:paddingRight="8dp"
            android:text="Samsung"
            android:textAllCaps="true"
            android:textSize="24sp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toLeftOf="@+id/model"
            app:layout_constraintTop_toBottomOf="@+id/date" />

        <TextView
            android:id="@+id/model"
            style="?attr/szyk_textBody"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:gravity="left"
            android:text="S6 edge"
            android:textAllCaps="true"
            android:textSize="24sp"
            app:layout_constraintBottom_toBottomOf="@+id/manufacturer"
            app:layout_constraintLeft_toRightOf="@+id/manufacturer"
            app:layout_constraintRight_toLeftOf="@+id/delete"
            app:layout_constraintTop_toTopOf="@+id/manufacturer" />

        <ImageView
            android:id="@+id/delete"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_vector_delete"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/serial"
            style="?attr/szyk_textMedium"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:ellipsize="end"
            android:singleLine="true"
            android:text="FDSF6D7A8FDAS6F7D89AS"
            android:textSize="12sp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/manufacturer" />

        <TextView
            android:id="@+id/restore"
            style="?attr/szyk_textButton"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="32dp"
            android:text="@string/restore"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/serial" />

    </android.support.constraint.ConstraintLayout>

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

Version

compile 'com.android.support.constraint:constraint-layout:1.0.2'

Tools

compileSdkVersion 27
buildToolsVersion '27.0.2'

Answer 1

Sorry, my bad. The root cause of the issue was style I've been using. It had defined android:layout_margin, which overrides all the more specific margins such as android:layout_marginTop

<item name="android:layout_margin">2dp</item>