在Android中从XML获取数据

Question

I am working on android application. In my app I got the xml data response from server and stored it in a string. Now I need to get each value of that xml and display in a dropdown. How can I do that. Please help me with this. Will be really thankful.

My xml data:

<?xml version="1.0" encoding="utf-8"?>

<root>
<status>first<status>
<description>very good</description>
<Firstnames>
<name>CoderzHeaven</name>
<name>Android</name>
<name>iphone</name>
</Firstnames>
<SecondNames>
 <name>Google</name>
 <name>Android</name>
</SecondNames>
</root>

I am getting the above mentioned xml data from server. Now I need to display that in listview. How can I get those values using xmlparser. I tried with different examples but it didnt work for me.

Answer 1

You will need to create an extra class and parametrize your adapter with objects of this class, an example data model would look like:

  public class DataClass {

private String status, description;
private ArrayList<String> fnames, lnames;

public DataClass() {
    fnames = new ArrayList<String>();
    lnames = new ArrayList<String>();
}

public String getStatus() {
    return status;
}

public void setStatus(String status) {
    this.status = status;
}

public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

    public ArrayList<String> getFnames() {
    return fnames;
}

public ArrayList<String> getLnames() {
    return lnames;
}
}

As for the XML parser, there are literally tons of examples, you're definitely in advantage if you can use search. Just to give you a staring point, tutorials one , two , three , four .

If you experience problems, post your efforts and the code that didn't work, what have you tried and so on. Then you'll get help, otherwise nobody on SO is going to write code for you. https://stackoverflow.com/help/how-to-ask

Answer 2

Here's how you can do it if the xml is inside of your apps assets folder.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    InputStream input = null;
    try {
        input = getApplicationContext().getAssets().open("data.xml");
    } catch (IOException e) {
        e.printStackTrace();
    }
    DocumentBuilder builder = null;
    try {
        builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    } catch (ParserConfigurationException e) {
        e.printStackTrace();
    }
    Document doc = null;
    if (builder == null) {
        Log.e("TAG", "Builder is empty.");
        return;
    }
    try {
        doc = builder.parse(input);
    } catch (SAXException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    if (doc == null) {
        Log.e("TAG", "Document is empty.");
        return;
    }

    // Get Firstnames element
    Element firstNames = (Element) doc.getElementsByTagName("Firstnames").item(0);
    // Get name nodes from Firstnames
    NodeList nameNodes = firstNames.getElementsByTagName("name");
    // Get count of names inside of Firstnames
    int cChildren = nameNodes.getLength();
    List<String> names = new ArrayList<String>(cChildren);
    for (int i=0; i<cChildren; i++) {
        names.add(nameNodes.item(i).getTextContent());
        Log.d("TAG","Name: "+names.get(i));
    }

    // Do same with SecondNames
}