1<?xml version="1.0" encoding="utf-8"?> 2<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> 3 <Button android:id="@+id/myButton" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hello" /> 4</LinearLayout> 5