1234abcd 1234abcd - 5 months ago 32
Android Question

android XmlPullParser parse xml to Listview

i have

listgender.xml
store in asset folder like this:

<gender>
<sex>male</sex>
<sex>female</sex>
</gender>


this is class gender :

public class ClassGender {
private String sex;
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}


this is
list_data
for listview:

<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv_gender"
android:textColor="#ff0004"
android:textSize="14sp" />


I use XmlPullParser parse xml to Listview:

ListView lv;

static final String KEY_GENDER = "sex";

List<ClassGender> spList = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_t4);

lv = (ListView) findViewById(R.id.listview_t4);
try {
XmlPullParserSpinner parser_Emp = new XmlPullParserSpinner();
spList = parser_Emp.parse(getAssets().open("listgender.xml"));

ArrayAdapter<ClassGender> adapter = new ArrayAdapter<ClassGender>(this,
R.layout.list_data, spList);

lv.setAdapter(adapter);

}
catch (Exception e){
e.printStackTrace();
}

}

public class XmlPullParserSpinner {

private ClassGender c_g;
private String text;

public XmlPullParserSpinner() {
spList = new ArrayList<ClassGender>();
}

public List<ClassGender> parse(InputStream is) {
XmlPullParserFactory factory = null;
XmlPullParser parser = null;
try {
factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
parser = factory.newPullParser();
parser.setInput(is, null);
int eventType = parser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
String tagname = parser.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if (tagname.equalsIgnoreCase(KEY_GENDER)) {
c_g = new ClassGender();
}
break;
case XmlPullParser.TEXT:
text = parser.getText();
break;
case XmlPullParser.END_TAG:
if (tagname.equalsIgnoreCase(KEY_GENDER)) {
spList.add(c_g);
c_g.setSex(text);
}
break;
default:
break;
}
eventType = parser.next();
}
} catch (Exception e) {
e.printStackTrace();
}
return spList;
}
}


my listView can get data from xml, but it not show value is
male
or
female
,


it show value is jame.test.ClassGender@5355eddc and
jame.test.ClassGender@5355ee54.


how to fix it ?

Answer

If you will see the code of ArrayAdapter

public class ArrayAdapter<T> extends BaseAdapter implements Filterable, ThemedSpinnerAdapter {

  //Some code

public View getView(int position, View convertView, ViewGroup parent) {
        return createViewFromResource(mInflater, position, convertView, parent, mResource);
    }

    private View createViewFromResource(LayoutInflater inflater, int position, View convertView,
            ViewGroup parent, int resource) {
        View view;
        TextView text;

        if (convertView == null) {
            view = inflater.inflate(resource, parent, false);
        } else {
            view = convertView;
        }

        try {
            if (mFieldId == 0) {
                //  If no custom field is assigned, assume the whole resource is a TextView
                text = (TextView) view;
            } else {
                //  Otherwise, find the TextView field within the layout
                text = (TextView) view.findViewById(mFieldId);
            }
        } catch (ClassCastException e) {
            Log.e("ArrayAdapter", "You must supply a resource ID for a TextView");
            throw new IllegalStateException(
                    "ArrayAdapter requires the resource ID to be a TextView", e);
        }

        T item = getItem(position);
        if (item instanceof CharSequence) {
            text.setText((CharSequence)item);
        } else {
            text.setText(item.toString());
        }

        return view;
    }

  //Some code

}

The line

        text.setText(item.toString());

uses the toString() method of the item. So, instead of passing a List of ClassGender you need to pass a List of String otherwise what you can do is override toString() in your class ClassGender which will return the sex object value.

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