Question

The title above is one of the requirements for an Android Application. I know XML is the code used to store data, like spread sheets ect…But how is an application supposed to “design” XML schemas? Also how is that applicable to an android application? Sorry my knowledge of android applications, or android in general is very low.

Answer 1

An application doesn’t design schema, the application designer does. (And it’s not code, it’s data.)

The process is the same as anything else: what do you need saved? What are the entities that need saving, at all levels? Do want an actual schema (.xsd file) in which you can define types, or do you just want a simple XML-based data file? The two are very different things.

Simple XML might look like this:

<contacts>
  <contact>
    <first>Dave</first>
    <last>Newton</last>
    <phone>630-555-1212</phone>
  </contact>

  <contact>
    <first>Foo</first>
    <last>Bar</last>
    <phone>312-123-4567</phone>
  </contact>
</contacts>

A schema definition for this describes what’s in the elements, what order they’re in, what’s optional (or not), their type, etc.

This doesn’t have anything to do with Android, rather XML.