activity_main_page.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.tlee1.petmanager.MainPage"
    android:background="#fbe9d1">


    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Pet Fitness"
        android:id="@+id/buttonFitness"
        android:onClick="OnClickListener"
        android:layout_alignTop="@+id/buttonPet"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        />

   <!-- <Spinner
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/spinner"
        android:layout_marginTop="130dp"
        android:spinnerMode="dropdown"
        android:entries="@array/pet_names"
        android:layout_below="@+id/buttonFitness"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />-->

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Pet Info"
        android:id="@+id/buttonPet"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Which one shall we choose?"
        android:id="@+id/textView"
        android:layout_above="@+id/textView2"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="32dp"
        android:textColor="#149636"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Just ask your pet for the answer"
        android:id="@+id/textView2"
        android:layout_above="@+id/textView3"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="29dp"
        android:textColor="#149636"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="They know everything"
        android:id="@+id/textView3"
        android:layout_above="@+id/buttonFitness"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="26dp"
        android:textColor="#149636"/>

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageViewMain"
        android:src="@drawable/funnydog"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_above="@+id/textView"
        android:layout_centerHorizontal="true" />

</RelativeLayout>