<?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:background="@color/im_color_black_333333"> <android.support.v4.widget.Space android:layout_width="match_parent" android:layout_height="0dip" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintDimensionRatio="1:1" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </android.support.constraint.ConstraintLayout>