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我是新來的android開發應用程序，我想解析rss url成listview。該代碼正在工作，但我們希望從rss提要中提取圖像並將其顯示到列表視圖中。從rss feed提取圖片
RssItem.java
public class RssItem {
// item title
private String title;
// item link
private String link;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
@Override
public String toString() {
return title;
}
}
ListListener.java
public class ListListener implements OnItemClickListener {
// List item's reference
List<RssItem> listItems;
// Calling activity reference
Activity activity;
public ListListener(List<RssItem> aListItems, Activity anActivity) {
listItems = aListItems;
activity = anActivity;
}
/**
* Start a browser with url from the rss item.
*/
public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(listItems.get(pos).getLink()));
activity.startActivity(i);
}
}
RssParseHandler.java
public class RssParseHandler extends DefaultHandler {
private List<RssItem> rssItems;
// Used to reference item while parsing
private RssItem currentItem;
// Parsing title indicator
private boolean parsingTitle;
// Parsing link indicator
private boolean parsingLink;
public RssParseHandler() {
rssItems = new ArrayList<RssItem>();
}
public List<RssItem> getItems() {
return rssItems;
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException
{
if ("item".equals(qName)) {
currentItem = new RssItem();
} else if ("title".equals(qName)) {
parsingTitle = true;
} else if ("link".equals(qName)) {
parsingLink = true;
}
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
if ("item".equals(qName)) {
rssItems.add(currentItem);
currentItem = null;
} else if ("title".equals(qName)) {
parsingTitle = false;
} else if ("link".equals(qName)) {
parsingLink = false;
}
}
@Override
public void characters(char[] ch, int start, int length) throws SAXException {
if (parsingTitle) {
if (currentItem != null)
currentItem.setTitle(new String(ch, start, length));
} else if (parsingLink) {
if (currentItem != null) {
currentItem.setLink(new String(ch, start, length));
parsingLink = false;
}
}
}
}
RssReader.java
public class RssReader {
private String rssUrl;
/**
* Constructor
*
* @param rssUrl
*/
public RssReader(String rssUrl) {
this.rssUrl = rssUrl;
}
/**
* Get RSS items.
*
* @return
*/
public List<RssItem> getItems() throws Exception {
// SAX parse RSS data
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
RssParseHandler handler = new RssParseHandler();
saxParser.parse(rssUrl, handler);
return handler.getItems();
}
}
ITCutiesReaderAppActivity.java
public class ITCutiesReaderAppActivity extends Activity {
// A reference to the local object
private ITCutiesReaderAppActivity local;
/**
* This method creates main application view
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set view
setContentView(R.layout.main);
// Set reference to this activity
local = this;
GetRSSDataTask task = new GetRSSDataTask();
// Start download RSS task
task.execute("http://www.itcuties.com/feed/#sthash.YI6YrEet.dpuf");
// Debug the thread name
Log.d("ITCRssReader", Thread.currentThread().getName());
}
public class GetRSSDataTask extends AsyncTask<String, Void, List<RssItem> > {
@Override
protected List<RssItem> doInBackground(String... urls) {
// Debug the task thread name
Log.d("ITCRssReader", Thread.currentThread().getName());
try {
// Create RSS reader
RssReader rssReader = new RssReader(urls[0]);
// Parse RSS, get items
return rssReader.getItems();
} catch (Exception e) {
Log.e("ITCRssReader", e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(List<RssItem> result) {
// Get a ListView from main view
ListView itcItems = (ListView) findViewById(R.id.listMainView1);
// Create a list adapter
ArrayAdapter<RssItem> adapter = new ArrayAdapter<RssItem> (local,android.R.layout.simple_list_item_1, result);
// Set list adapter for the ListView
itcItems.setAdapter(adapter);
// Set list view item click listener
itcItems.setOnItemClickListener(new ListListener(result, local));
}
}
}
所以...你有什麼實際問題？您希望我們閱讀這段代碼的重載並準確告訴您要添加或更改哪些內容？你至少可以把它放在幾行實際上相關的代碼中嗎？ –
這段代碼只會從rss中提取標題，但我想將這些圖像也提取到列表視圖中。 – user2870902