<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <Button

        android:id="@+id/myButton"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Calc" />

    <EditText

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/editText1"

        android:hint="Radius" />

    <TextView

        android:textAppearance="?android:attr/textAppearanceMedium"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/textView1" />

</LinearLayout>