问题
i have a sample code for parsing data from XML , In XML parsing SAX,DOC,and XML Pull parser which is the best XML parser ,what is json parser...? and how to parse news feeds through json parser.please answer with any examples
public class MainActivity1 extends Activity {
private String
finalUrl="http://downloads.bbc.co.uk/podcasts/worldservice/globalnews/rss.xml";
private HandleXML obj;
private TextView title,link,description;
private LinearLayout mWeatherInfosLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
finalUrl = intent.getStringExtra("url");
setContentView(R.layout.activity_main_activity1);
mWeatherInfosLayout = (LinearLayout) findViewById(R.id.weather_infos1);
fetch();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void fetch(){
obj = new HandleXML(finalUrl);
obj.fetchXML();
mWeatherInfosLayout.removeAllViews();
while(obj.parsingComplete)
{
if(obj.gotit)
{
final LinearLayout forecastInfoLayout = (LinearLayout)
getLayoutInflater().inflate(R.layout.feedlist, null);
final TextView tvWeather1 = (TextView)
forecastInfoLayout.findViewById(R.id.textview_forecast_info1);
final TextView tvWeather2 = (TextView)
forecastInfoLayout.findViewById(R.id.textview_forecast_info2);
final TextView tvWeather3 = (TextView)
forecastInfoLayout.findViewById(R.id.textview_forecast_info3);
final TextView tvWeather4 = (TextView)
forecastInfoLayout.findViewById(R.id.textview_forecast_info4);
tvWeather1.setText(obj.getTitle());
tvWeather4.setText(obj.getPubDate());
tvWeather2.setText(obj.getLink());
String string = obj.getDescription();
String[] parts = string.split("<");
String part1 = parts[0];
tvWeather3.setText(part1);
mWeatherInfosLayout.addView(forecastInfoLayout);
obj.setgotit();
}
}
}
}
回答1:
Change your HandleXML Class accordingly.
public class HandleXML {
private String title = "title";
private String link = "link";
private String description = "description";
private String urlString = null;
private XmlPullParserFactory xmlFactoryObject;
public volatile boolean parsingComplete = true;
public HandleXML(String url){
this.urlString = url;
}
public String getTitle(){
return title;
}
public String getLink(){
return link;
}
public String getDescription(){
return description;
}
public void parseXMLAndStoreIt(XmlPullParser myParser) {
int event;
String text=null;
try {
event = myParser.getEventType();
while (event != XmlPullParser.END_DOCUMENT) {
String name=myParser.getName();
switch (event){
case XmlPullParser.START_TAG:
break;
case XmlPullParser.TEXT:
text = myParser.getText();
break;
case XmlPullParser.END_TAG:
if(name.equals("title")){
title = text;
}
else if(name.equals("link")){
link = text;
}
else if(name.equals("description")){
description = text;
}
else{
}
break;
}
event = myParser.next();
}
parsingComplete = false;
} catch (Exception e) {
e.printStackTrace();
}
}
public void fetchXML(){
Thread thread = new Thread(new Runnable(){
@Override
public void run() {
try {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setRequestMethod("GET");
conn.setDoInput(true);
// Starts the query
conn.connect();
InputStream stream = conn.getInputStream();
xmlFactoryObject = XmlPullParserFactory.newInstance();
XmlPullParser myparser = xmlFactoryObject.newPullParser();
myparser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
myparser.setInput(stream, null);
parseXMLAndStoreIt(myparser);
stream.close();
} catch (Exception e) {
}
}
});
thread.start();
}
}
来源：https://stackoverflow.com/questions/26397647/how-to-make-rss-news-reader-application-in-android