1<?xml version="1.0" encoding="utf-8"?> 2<RelativeLayout 3 xmlns:android="http://schemas.android.com/apk/res/android" 4 xmlns:tools="http://schemas.android.com/tools" 5 android:layout_width="match_parent" 6 android:layout_height="match_parent" 7 tools:context=".MainActivity"> 8 9<android.widget.TextView 10 android:id="@+id/text_view" 11 android:layout_centerInParent="true" 12 android:layout_width="wrap_content" 13 android:layout_height="wrap_content"/> 14 15</RelativeLayout> 16