<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    android:orientation="vertical">

    <TextView
        android:id="@+id/one"
        android:layout_centerInParent="true"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:background="#4593Ec"
        android:gravity="center"
        android:text="1"
        android:textColor="@color/white"
        android:textSize="40sp"/>

    <TextView
        android:id="@+id/two"
        android:layout_alignParentBottom="true"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:background="#7DB145"
        android:gravity="center"
        android:text="2"
        android:textColor="@color/white"
        android:textSize="25sp"/>

    <TextView
        android:id="@+id/three"
        android:layout_alignParentRight="true"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:background="#F10000"
        android:gravity="center"
        android:text="3"
        android:textColor="@color/white"
        android:textSize="25sp"/>

</RelativeLayout>