How to get node value from xml?

Question

I am trying to read a xml file from /data/data/aas/a.xml. But I don't know how to get started. I well remounted /data as rw and chmod 777 /data/data/a.xml. It is rooted. It works on adb well .

My xml format is ...

<map>
    <string name="aaa">123</string>
    <string name="bbb">222</string>
    ...
    ...
    <string name="ccc">999</string>
</map>

I want to get the value of ccc(999) in that way. How can I achieve it .Please help me please .. I am very new to android programming ! Please give me full explanation .

Code In my onCreate()..

  process = Runtime.getRuntime().exec("su");
  os = new DataOutputStream(process.getOutputStream());
  os.writeBytes("mount -o remount rw /data");
  os.writeBytes("chmod 777 data/data/com.aas.a/a.xml");

... In a.xml

  <?xml version="1.0" encoding="utf-8" standalone="yes" ?> 
  <map>
     <string name="ccc">0000</string>
  </map>

... I want 0000 from this . Thank you ..

you just want to get cc? – Rod_Algonquin Jun 15 '14 at 20:34 — Rod_Algonquin, Jun 15 '14 at 20:34
999 (value of ccc) .. thank you – user3517970 Jun 15 '14 at 20:35 — user3517970, Jun 15 '14 at 20:35

score 1 · Answer 1 · answered Jun 15 '14 at 20:22

1

Use DOM with java. Here's an example.

answered Jun 15 '14 at 20:22

antogerva

549
1
9
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It is too complicated. Can show write some samples with mine. If possible. Thank you so much for Answering. – user3517970 Jun 15 '14 at 20:29

score 1 · Answer 2 · answered Jun 15 '14 at 21:04

1

You can use dom4j with java and use the XPATH command to get the value you want, if you don't mind to add the library to your project:

public static void main( String[] args ) throws DocumentException{
    org.dom4j.Document doc = null;
    File theXml = new File("pathToXml.xml");

    SAXReader reader = new SAXReader();
    doc = (org.dom4j.Document) reader.read(theXml);
    Element elem = (Element) doc.selectSingleNode("/map/string[@name='ccc']");
    System.out.println(elem.getStringValue());
}

answered Jun 15 '14 at 21:04

antogerva

549
1
9
22

Could you please give me the direct download link jar file to add to my library folder! – user3517970 Jun 15 '14 at 21:07
Get [dom4j](http://mvnrepository.com/artifact/dom4j/dom4j/1.6.1) along with [jaxen](http://mvnrepository.com/artifact/jaxen/jaxen/1.1.6) and you should be good to go. – antogerva Jun 15 '14 at 21:16
I think you will be annoyed with me .. I am very very new to android programming .. I don't know how to call it on my onCreate() :D .. And this line is under auto correct like that . . I am still dull .. System.out.println(((Node) elem).getStringValue()); – user3517970 Jun 15 '14 at 21:25
You should probably create an another question for that. – antogerva Jun 15 '14 at 21:33
No problem, I'm Happy to help! That said, if this answer or any other one solved your issue, please mark it as accepted. – antogerva Jun 15 '14 at 21:45

score -1 · Answer 3 · edited Jun 16 '14 at 21:18

-1

if you want just the ccc of your xml then you can just use a pattern that will split the string between the tag.

try this:

Pattern p = Pattern.compile("name=\"ccc\">(.*?)</string>");
Matcher m = p.matcher(your_xml_here);
if (m.find()) 
  Log.d("result: ",m.group(1)); // => "3"

where your_xml_here is the xml in string form ......

edited Jun 16 '14 at 21:18

user3517970

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answered Jun 15 '14 at 20:46

Rod_Algonquin

26,074
6
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1

http://stackoverflow.com/questions/8577060/why-is-it-such-a-bad-idea-to-parse-xml-with-regex .. Generally I advice against parsing xml using regex. It's a bad habit to get into. – Rudi Kershaw Jun 15 '14 at 20:48
if your pattern meet my xml pattern ? It still doesn't work . – user3517970 Jun 16 '14 at 19:25
@user3517970 when you print your xml string what does it look like? – Rod_Algonquin Jun 16 '14 at 21:06
sorry .I just edited in your answer to be clear . No result log nor response to your code when it runs . Thank you. – user3517970 Jun 16 '14 at 21:11
1

@user3517970, please stop adding comments to peoples questions and answers. Add your own comment or add your own answer. – Julian Knight Jun 16 '14 at 21:16
@user3517970 show my what have you dont in your code post it – Rod_Algonquin Jun 16 '14 at 21:18
sorry. I corrected it. Please advice me to get the result ! Thank you . – user3517970 Jun 16 '14 at 21:19
@user3517970 what code have you written yet in your activity?? post it. – Rod_Algonquin Jun 16 '14 at 21:26
Yes, I posted it . Thank you. I am new to android programming. – user3517970 Jun 16 '14 at 21:32

How to get node value from xml?

3 Answers3