activity_welcome.xml

<?xml version="1.0" encoding="utf-8"?><!--
  ~ Copyright 2017 Kaushik N. Sanji
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~    http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<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"
    tools:context="com.example.kaushiknsanji.birdquiz.WelcomeActivity">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitXY"
        android:src="@drawable/aves" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerInParent="true"
        android:layout_marginBottom="@dimen/welcome_overlay_screen_bottom_margin"
        android:layout_marginEnd="@dimen/welcome_overlay_screen_right_margin"
        android:layout_marginLeft="@dimen/welcome_overlay_screen_left_margin"
        android:layout_marginRight="@dimen/welcome_overlay_screen_right_margin"
        android:layout_marginStart="@dimen/welcome_overlay_screen_left_margin"
        android:layout_marginTop="@dimen/welcome_overlay_screen_top_margin"
        android:background="@color/welcomeOverlayBackgroundAlphaGrey50"
        android:orientation="vertical">

        <TextView
            android:id="@+id/title_text_id"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginTop="@dimen/title_text_top_margin"
            android:lineSpacingMultiplier="1.1"
            android:textAlignment="center"
            android:textColor="@color/titleTextRed800"
            android:textSize="@dimen/title_text_size"
            tools:text="@string/title_text" />

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="@dimen/info_text_scrollview_height"
            android:layout_marginEnd="@dimen/info_text_scrollview_right_margin"
            android:layout_marginLeft="@dimen/info_text_scrollview_left_margin"
            android:layout_marginRight="@dimen/info_text_scrollview_right_margin"
            android:layout_marginStart="@dimen/info_text_scrollview_left_margin"
            android:layout_marginTop="@dimen/info_text_scrollview_top_margin"
            android:layout_weight="1"
            android:fillViewport="true">

            <TextView
                android:id="@+id/info_text_id"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="@dimen/info_text_padding"
                android:textColor="@android:color/black"
                android:textSize="@dimen/info_text_size"
                tools:text="@string/info_text" />

        </ScrollView>

        <Button
            android:id="@+id/begin_quiz_button_id"
            style="@style/submit_hint_button_style"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_margin="@dimen/begin_quiz_button_margin"
            android:padding="@dimen/begin_quiz_button_padding"
            android:text="@string/begin_quiz_button_text" />

    </LinearLayout>

</RelativeLayout>