testapps/libsTest/lib1/res/layout/lib1_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/lib1_text1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/lib1_string" />

    <TextView
        android:id="@+id/lib1_text2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <include layout="@layout/lib2_main" />

</LinearLayout>