Android Build a Simple Android App with Java Creating the Screen Layout Setting Colors

Make sure you use the white value exactly as set in android:background?

i dont wok script?

activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@android:color/white" >

  <TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="Treehouse loves me!"
    android:background.="#FFFFFF"
    android:textColor="#000000"
    android:textSize="72sp" />

</RelativeLayout>