Question

When creating a custom element with attributes in Android I need to put the namespace of the application in the layout.

For example:

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

    <org.example.mypackage.MyCustomView
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:gravity="center"
      whatever:my_custom_attribute="Hello, world!" />
</LinearLayout>

Does this also requires that the structure of my project in Eclipse be the same as the name of the Android package as definied in the Manifest – as per the example?
Would this work too:

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

    <org.example.mypackage.MyCustomView
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:gravity="center"
      whatever:my_custom_attribute="Hello, world!" />
</LinearLayout>

Answer 1

Its the package name of your application that should be reflected. So its correct to use it as you are doing.

For example:

In xmlns:whatever="http://schemas.android.com/apk/res/org.mycompany.myproduct the last part org.mycompany.myproduct should be the same as your package name. And you may change xmlns:whatever to anything like xmlns:theblitz but then make sure you do use theblitz as a prefix for your attributes in the xml.

For more info, read this