hallo world
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"> <!-- Vertical Orientation set -->
<!-- Child Views(In this case 2 Button) are here -->
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button1"
android:id="@+id/button"
android:background="#358a32" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button2"
android:id="@+id/button2"
android:background="#0058b6" />
</LinearLayout>