AndroidCodeChallenge/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/edtxt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hint="Search Giphy"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/gifsList"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginTop="20dp"
                android:gravity="center"
                app:layout_constrainedHeight="true"
                app:layout_constraintTop_toBottomOf="@id/edtxt"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                 />

</androidx.constraintlayout.widget.ConstraintLayout>