在Android中搜索具有另一个属性的XML属性

Question

I am currently trying to search a local XML File to retrieve a certain attribute, my search key is also another attribute.

My XML is like this:

<JPPlatforms>
  <Platform PlatformTag="2980" PlatformNo="47280">
  </Platform>
<JPPlatforms>

I want to search the 1000 or so lines for the PlatformNo 47280 and return the PlatformTag 2980.

How would I implement this in Java for Android? Should I use an XMLPullParser is there something more efficient to find and return one particular value in XML?

Answer 1

This is trivial if you can use XPath :

//Platform[@PlatformNo=47280]/@PlatformTag

Explanation :

• //Platform : find Platform element, anywhere in the XML document...
• [@PlatformNo=47280] : ...where PlatformNo attribute value equals 47280
• /@PlatformTag : from such Platform , return PlatformTag attribute

I haven't used XPath in Android, but it seem possible according to this thread : Search in XML File with XPath in Android

Answer 2

Try XMLReader .

Here is the examples of usage:
https://docs.oracle.com/javase/tutorial/jaxp/sax/parsing.html
http://www.mkyong.com/java/how-to-read-xml-file-in-java-sax-parser/