uu-android/devicemanager/src/main/res/layout/activity_splash.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    android:orientation="vertical">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="Hello World"
        android:gravity="center|center_vertical"
        />



</LinearLayout>