res/layout/activity_main.xml

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_gravity="center_horizontal"
        android:gravity="center_horizontal" >

        <TextView
            android:id="@+id/textViewAppInfo"
            android:layout_width="321dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            android:layout_marginTop="24dp"
            android:layout_gravity="center"
            android:textColorLink="@color/google_blue600"
            android:text="@string/textViewAppInfo"
            android:textSize="16sp"
            android:textAppearance="@android:style/TextAppearance" />

        <Button
            android:id="@+id/buttonModifyLocationSettings"
            style="@android:style/Widget.DeviceDefault.Button.Borderless"
            android:layout_width="264dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="48dp"
            android:gravity="center_vertical|center_horizontal"
            android:background="@drawable/button_modify_location_settings_shape"
            android:text="@string/buttonModifyLocationSettings"
            android:textAllCaps="false"
            android:textColor="@android:color/white"/>
    </LinearLayout>
</ScrollView>