Declarative UI Brief Analysis

example1.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Text1"
        android:textColor="@color/black"
        android:textSize="21sp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Text2"
        android:textColor="@color/black"
        android:textSize="21sp" />

</LinearLayout>