xml file for an fair a trip app

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/e1"
            android:textSize="35dp"
            android:hint="Enter Your Distance"
            android:textColorHint="@color/colorPrimary"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/b1"
            android:layout_gravity="center"
            android:text="ENTER"
            android:textSize="25dp"/>

    <TextView
        android:id="@+id/t1"
        android:layout_width="match_parent"
        android:layout_height="70dp" />

    </LinearLayout>