activity_maps.xml

<LinearLayout 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:orientation="vertical"
    android:weightSum="1"
    tools:context=".MapsActivity">

    <EditText
        android:id="@+id/lat"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Latitude" />

    <EditText
        android:id="@+id/lon"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Longitude" />
    <Button
        android:id="@+id/enter"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="Enter"
        android:text="Enter" />
    <TextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="5dp"
        android:gravity="center"
        android:text="Earthquake Risk:" />


    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:map="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="350dp"
        android:layout_marginBottom="50dp"
        tools:context="com.earthquake.archi.earthquake.MapsActivity" />


</LinearLayout>