Regarding Android Xmlns

When we develop layouts in Android all the xml files begin with xmlns:android='http://schemas.android.com/apk/res/android' What does this do and why for developing application my

Solution 1:

xmlns is xml name space

The namespace is defined by the xmlns attribute in the start tag of an element. The namespace declaration has the following syntax. xmlns:prefix="URI".

xmlns:android

Defines the Android namespace. This attribute should always be set to "http://schemas.android.com/apk/res/android".

http://www.w3schools.com/xml/xml_namespaces.asp

Here's a list of similar question's

What does "xmlns" in XML mean?

Why this line xmlns:android="http://schemas.android.com/apk/res/android" must be the first in the layout xml file?

Solution 2:

It is just like defining a namespace in C++,

A good explanation can be found here:

Why this line xmlns:android="http://schemas.android.com/apk/res/android" must be the first in the layout xml file?