Hi,

I am trying to understand Custom Widget example in android , specifically the LableView in the android sample.

In the custom_view_1.xml, it has
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res/com.example.android.apis"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">

Can you please tell me where is the scheme 'xmlns:app' defined? How can I do the same for my application.

I tried to copy that line to my layout.xml file, I get this error in eclipse:

Description Resource Path Location Type
ERROR No resource identifier found for attribute 'myTestAttribute' in package 'com.example.android.apis' calculator.xml Instrumentation/res/layout line 50 aapt Problem

Thank you for any help.