this is a layout for a simple comment

item_expandable_comment.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <LinearLayout
        android:id="@+id/separatorContainer"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginStart="@dimen/activity_horizontal_margin"
        android:layout_marginEnd="@dimen/activity_horizontal_margin"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:visibility="gone"
        android:orientation="horizontal"/>

    <TextView
        android:id="@+id/tv_user"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/activity_horizontal_margin"
        tools:text="/u/Username"
        app:layout_constraintTop_toTopOf="parent"
        android:textColor="@color/grey2"
        app:layout_constraintLeft_toRightOf="@id/separatorContainer" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        tools:text="* 5h"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_margin="@dimen/activity_horizontal_margin"
        android:layout_marginStart="4dp"
        app:layout_constraintLeft_toRightOf="@id/tv_user"
        android:id="@+id/textView" />

    <TextView
        android:id="@+id/body"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="12dp"
        android:layout_margin="@dimen/activity_horizontal_margin"
        tools:text="Body of comment"
        app:layout_constraintTop_toBottomOf="@id/tv_user"
        app:layout_constraintLeft_toRightOf="@id/separatorContainer" />

    <TextView
        android:id="@+id/tv_reply"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:text="Reply" />

    <View
        android:id="@+id/separator1"
        android:layout_width="1dp"
        android:layout_height="16dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:background="@color/grey"
        app:layout_constraintTop_toBottomOf="@id/body"
        app:layout_constraintRight_toLeftOf="@id/tv_reply"
        app:layout_constraintBottom_toBottomOf="parent"/>


    <ImageButton
        android:id="@+id/btn_down_vote"
        android:layout_width="20dp"
        android:layout_height="20dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:background="@android:drawable/ic_media_next"
        app:layout_constraintTop_toBottomOf="@id/body"
        app:layout_constraintRight_toLeftOf="@id/separator1"
        app:layout_constraintBottom_toBottomOf="parent"/>

    <TextView
        android:id="@+id/tv_votes"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toLeftOf="@id/btn_down_vote"
        app:layout_constraintBottom_toBottomOf="parent"
        android:text="1.4k" />

    <ImageButton
        android:id="@+id/btn_upvote"
        android:layout_width="20dp"
        android:layout_height="20dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:background="@android:drawable/ic_media_next"
        app:layout_constraintTop_toBottomOf="@id/body"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toLeftOf="@id/tv_votes" />

</android.support.constraint.ConstraintLayout>