Android Lab: Relative Layout - Work - Defining an XML Layout

gistfile1.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <EditText
        android:id="@+id/editTextMain"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/textViewHour"
        android:layout_width="40dp"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/editTextMain"
        android:text="Hour" />

    <EditText
        android:id="@+id/editTextHour"
        android:layout_width="96dp"
        android:layout_height="wrap_content"
        android:layout_below="@id/editTextMain"
        android:layout_toRightOf="@id/textViewHour"
        android:gravity="left" />

    <TextView
        android:id="@+id/textViewMin"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:layout_below="@id/editTextMain"
        android:layout_toRightOf="@id/editTextHour"
        android:text="Minute" />

    <EditText
        android:id="@+id/editTextTime"
        android:layout_width="96dp"
        android:layout_height="wrap_content"
        android:layout_below="@id/editTextMain"
        android:layout_toRightOf="@id/textViewMin" />
    
    <Button
        android:id="@+id/buttonAdd"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/editTextTime" 
        android:layout_centerInParent="true"
        android:text="Add work"
        />

</RelativeLayout>