在这个sax解析代码中，我已经获得了加载数据的屏幕，但xml文件没有被解析.....任何人都可以尽快帮助这个，因为我要提交应用程序....
我的代码..
public class Xmlfile extends Activity {
// For Single Data
private List<String> item = new ArrayList<String>();
public ArrayList<StudentDetails> data = new ArrayList<StudentDetails>();
Xmlfile x;
private boolean in_name;
private boolean in_formatted_address;
private boolean in_lat;
private boolean in_lng;
StudentDetails d;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
x = this;
new StudentTask().execute();
}
public class StudentTask extends AsyncTask<Void, Void, Void> {
ProgressDialog pd;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pd = ProgressDialog.show(x, "Please Wait", "Loading Data");
pd.setCancelable(true);
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
URL u = new URL(
"https://maps.googleapis.com/maps/api/place/textsearch/xml?query=restaurants+in+Vijayawada&sensor=true&key=AIzaSyC-bRTW12s9l3iZ57wPZGrH8kRMpQPeF5s");
InputSource i = new InputSource(u.openStream());
SAXParserFactory sx = SAXParserFactory.newInstance();
SAXParser msx = sx.newSAXParser();
XMLReader reader = msx.getXMLReader();
MyXmlHandler myRSSHandler = new MyXmlHandler();
reader.setContentHandler(myRSSHandler);
// Reading xml file from raw folder.
// InputStream istream = null;
// istream =
// getApplicationContext().getResources().openRawResource(R.raw.studentdetails);
// InputSource myInputSource = new
// InputSource(rssUrl.openStream());
// myXMLReader.parse(myInputSource);
reader.parse(new InputSource(u.openStream()));
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return null;
}
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
// setListAdapter(new
// ArrayAdapter<String>(x,android.R.layout.simple_list_item_1,
// item));
// StudentDetails d = new StudentDetails();
// data.add(d);
ListView l=(ListView)findViewById(R.id.list);
Demo demo=new Demo();
l.setAdapter(demo);
pd.dismiss();
}
}
// 1)Implementing Handler to get data from xml file
public class MyXmlHandler extends DefaultHandler {
private boolean in_name = false;
private boolean in_formatted_address = false;
private boolean in_lat = false;
private boolean in_lng = false;
// private boolean in_clas = false;
// private boolean in_phno = false;
// private boolean in_email = false;
String name;
String formatted_address;
public String lat, lng;
@Override
public void startDocument() throws SAXException {
// TODO Auto-generated method stub
}
@Override
public void endDocument() throws SAXException {
// TODO Auto-generated method stub
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
if (localName.equals("name")) {
d=new StudentDetails();
this.in_name = true;
} else if (localName.equals("formatted_address")) {
this.in_formatted_address = true;
} else if (localName.equals("lat")) {
this.in_lat = true;
}
else if (localName.equals("lng")) {
this.in_lng = true;
}
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (this.in_name) {
name = new String(ch, start, length);
d.setName(name);
//Log.v("name========", name + item.size());
}
else if (this.in_formatted_address) {
formatted_address = new String(ch, start, length);
d.setFormatted_address(formatted_address);
} else if (this.in_lat) {
lat = new String(ch, start, length);
d.setLat(lat);
}
else if (this.in_lng) {
lng = new String(ch, start, length);
d.setLng(lng);
}
}
public void endElement(String uri, String localName, String qName)
throws SAXException {
// TODO Auto-generated method stub
if (localName.equals("name")) {
this.in_name = false;
} else if (localName.equals("formatted_address")) {
this.in_formatted_address = false;
}
else if (localName.equals("lat")) {
this.in_lat = false;
} else if (localName.equals("lng")) {
this.in_lng = false;
data.add(d);
}
}
}
public class Demo extends BaseAdapter
{
Activity context;
private List<String> s;
public Demo() {
super();
this.context = context;
this.s = s;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
// return LISTITEMS.size();
return data.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return data.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = LayoutInflater.from(parent.getContext());
v = vi.inflate(R.layout.activitymain, null);
}
final StudentDetails studentdetails=data.get(position);
// ImageView img=(ImageView)v.findViewById(R.id.img);
TextView name = (TextView) v.findViewById(R.id.name);
TextView formatted_address = (TextView) v
.findViewById(R.id.formatted_address);
TextView lat = (TextView) v.findViewById(R.id.lat);
TextView lng = (TextView) v.findViewById(R.id.lng);
// c.moveToPosition(position);
// img.setImageResource(Integer.parseInt(c.getString(0)));
name.setText(data.get(position).getName());
formatted_address
.setText(data.get(position).getFormatted_address());
lat.setText(data.get(position).getLat());
lng.setText(data.get(position).getLng());
return v;
}
}
}
getter and setterss ....
public String name,formatted_address,lat,lng;
public StudentDetails(String n,String f,String la,String ln)
{
this.name=n;
this.formatted_address=f;
this.lat=la;
this.lng=ln;
}
public StudentDetails(){
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getFormatted_address() {
return formatted_address;
}
public void setFormatted_address(String Formatted_address) {
this.formatted_address = formatted_address;
}
public String getLat() {
return lat;
}
public void setLat(String Lat) {
this.lat = lat;
}
public String getLng() {
return lng;
}
public void setLng(String Lng) {
this.lng = lng;
}
}
答案 0 :(得分：0)
尝试将您的方法更改为characters(char[] ch, int start, int length)：
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (this.in_name) {
name += new String(ch, start, length);
/* What does list 'item' actually do in your code? */
item.add(name);
Log.v("name========", name + item.size());
} else if (this.in_formatted_address) {
formatted_address += new String(ch, start, length);
item.add(formatted_address);
} else if (this.in_lat) {
lat += new String(ch, start, length);
item.add(lat);
} else if (this.in_lng) {
lng += new String(ch, start, length);
item.add(lng);
}
}
为什么在将endElement(String uri, String localName, String qName)方法中的所有字段设置为StudentDetails类之前将所有字段设置为null，我想它应该是：
public void endElement(String uri, String localName, String qName)
throws SAXException {
if (localName.equals("name")) {
StudentDetails s = new StudentDetails(name,formatted_address, lat, lng);
data.add(s);
String lng = "";
String name = "";
String formatted_address = "";
String lat = "";
this.in_name = false;
} else if (localName.equals("formatted_address")) {
this.in_formatted_address = false;
} else if (localName.equals("lat")) {
this.in_lat = false;
} else if (localName.equals("lng")) {
this.in_lng = false;
}
}