我在我的应用程序中粘贴RSS Feed，当我只解析一个然后它运行正常但我有8个不同的URL地址想要设置按钮，我想解析每个按钮点击RSS Fedd。我正在使用SAX Parser 。我的代码在
之下BaseFeedParser.java
package com.example.shareslab;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import com.example.shareslab.Message;
import android.sax.Element;
import android.sax.EndElementListener;
import android.sax.EndTextElementListener;
import android.sax.RootElement;
import android.util.Xml;
public class BaseFeedParser {
static String feedUrlString = "http://www.xxxx.com/rss.xml";
// names of the XML tags
static final String RSS = "rss";
static final String CHANNEL = "channel";
static final String ITEM = "item";
static final String PUB_DATE = "pubDate";
static final String DESCRIPTION = "description";
static final String LINK = "link";
static final String TITLE = "title";
private final URL feedUrl;
protected BaseFeedParser(){
try {
this.feedUrl = new URL(feedUrlString);
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
}
protected InputStream getInputStream() {
try {
return feedUrl.openConnection().getInputStream();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public List<Message> parse() {
final Message currentMessage = new Message();
RootElement root = new RootElement(RSS);
final List<Message> messages = new ArrayList<Message>();
Element itemlist = root.getChild(CHANNEL);
Element item = itemlist.getChild(ITEM);
item.setEndElementListener(new EndElementListener(){
@Override
public void end() {
messages.add(currentMessage.copy());
}
});
item.getChild(TITLE).setEndTextElementListener(new EndTextElementListener(){
@Override
public void end(String body) {
currentMessage.setTitle(body);
}
});
item.getChild(LINK).setEndTextElementListener(new EndTextElementListener(){
@Override
public void end(String body) {
currentMessage.setLink(body);
}
});
item.getChild(DESCRIPTION).setEndTextElementListener(new EndTextElementListener(){
@Override
public void end(String body) {
currentMessage.setDescription(body);
}
});
item.getChild(PUB_DATE).setEndTextElementListener(new EndTextElementListener(){
@Override
public void end(String body) {
currentMessage.setDate(body);
}
});
try {
Xml.parse(this.getInputStream(), Xml.Encoding.UTF_8, root.getContentHandler());
} catch (Exception e) {
throw new RuntimeException(e);
}
return messages;
}
}
我有8个按钮和8个RSS Feed的URL地址，我想为每个按钮解析每个按钮
MessageList.java
package com.example.shareslab;
import java.util.ArrayList;
import java.util.Arrays;
import com.example.shareslab.R;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class MessageList extends ListActivity implements OnClickListener {
Button home,socialmedia,tech,usworld,business,fashion,people,political;
public static String singleDescription;
public static String title,URLToPost,imageURL;
public static ArrayList<String> galleryImages;
private static class EfficientAdapter extends BaseAdapter
{
private LayoutInflater mInflater;
public EfficientAdapter(Context context)
{
mInflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
System.out.println("description COUNT : "+SplashActivity.description.size());
return SplashActivity.description.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.inflate_list_item, null);
holder = new ViewHolder();
holder.title = (TextView) convertView.findViewById(R.id.inflate_title);
holder.des = (TextView) convertView.findViewById(R.id.inflate_description);
holder.im= (ImageView) convertView.findViewById(R.id.inflate_image);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
UrlImageViewHelper.setUrlDrawable(holder.im, SplashActivity.imageURLAmit.get(position),null);
holder.title.setText(SplashActivity.titles.get(position));
holder.des.setText(SplashActivity.description.get(position));
return convertView;
}
public static class ViewHolder {
TextView title,des;
ImageView im;
}
} // close class Efficent adapter
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
home=(Button)findViewById(R.id.buttonhome);
socialmedia=(Button)findViewById(R.id.buttonsocial);
tech=(Button)findViewById(R.id.buttontech);
usworld=(Button)findViewById(R.id.buttonusworld);
business=(Button)findViewById(R.id.buttonbusiness);
fashion=(Button)findViewById(R.id.buttonfashion);
people=(Button)findViewById(R.id.buttonpeople);
political=(Button)findViewById(R.id.buttonpolitical);
home.setOnClickListener(this);
socialmedia.setOnClickListener(this);
tech.setOnClickListener(this);
usworld.setOnClickListener(this);
business.setOnClickListener(this);
fashion.setOnClickListener(this);
people.setOnClickListener(this);
political.setOnClickListener(this);
ListView listView = getListView();
listView.setTextFilterEnabled(true);
this.setListAdapter(new EfficientAdapter(this));
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
galleryImages=new ArrayList<String>();
singleDescription=SplashActivity.description.get(position);
title=SplashActivity.titles.get(position);
URLToPost=SplashActivity.link.get(position);
imageURL=SplashActivity.imageURLAmit.get(position);
System.out.println("ON CLICK URL: "+URLToPost);
galleryImages.addAll(Arrays.asList(SplashActivity.arrays[position]));
startActivity(new Intent(MessageList.this,MessageListDetail.class));
}
});
}
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
}
}
答案 0 :(得分：0)
您可以将每个字段的网址存储为相应按钮的标记。
// ...
home.setOnClickListener(this);
home.setTag(new URL("http://example.com/feed1.xml"));
socialmedia.setOnClickListener(this);
socialmedia.setTag(new URL("http://example.com/feed2.xml"));
tech.setOnClickListener(this);
tech.setTag(new URL("http://example.com/feed3.xml"));
}
@Override
public void onClick(View v) {
URL feedUrl = (URL) v.getTag();
// Then do your thing
new FeedParser(feedUrl);
}
为解析器创建一个公共构造函数：
public BaseFeedParser(URL feedUrl){
this.feedUrl = feedUrl;
}
答案 1 :(得分：-1)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/background"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:text="SPORTS LIVE"
android:textColor="#000000"
android:textSize="25dp" />
<Button
android:id="@+id/button1"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:layout_marginTop="48dp"
android:background="@drawable/nfl"/>
<Button
android:id="@+id/button2"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button1"
android:layout_below="@+id/button1"
android:layout_gravity="center"
android:layout_marginTop="50dp"
android:background="@drawable/nba" />
<Button
android:id="@+id/button3"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button2"
android:layout_below="@+id/button2"
android:layout_gravity="center"
android:layout_marginTop="50dp"
android:background="@drawable/mlb" />
<Button
android:id="@+id/button4"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button3"
android:layout_below="@+id/button3"
android:layout_gravity="center"
android:layout_marginTop="50dp"
android:background="@drawable/ncaa" />
</LinearLayout>
public class MainActivity extends Activity {
Button NFL,NBA,MLB,NCAA;
Intent i;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
NFL= (Button) findViewById(R.id.button1);
NBA= (Button) findViewById(R.id.button2);
MLB= (Button) findViewById(R.id.button3);
NCAA= (Button) findViewById(R.id.button4);
i= new Intent("idss.sportslive.All");
// NFL
NFL.setOnTouchListener( new OnTouchListener()
{
@Override
public boolean onTouch(View arg0, MotionEvent event) {
// TODO Auto-generated method stub
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
NFL.setBackgroundResource(R.drawable.nflhigh);
break;
case MotionEvent.ACTION_UP:
NFL.setBackgroundResource(R.drawable.nfl);
// i= new Intent("idss.sportslive.All");
i.putExtra("url", 0);
startActivity(i);
break;
}
return false;
}
});
// NBA
NBA.setOnTouchListener( new OnTouchListener()
{
@Override
public boolean onTouch(View arg0, MotionEvent event) {
// TODO Auto-generated method stub
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
NBA.setBackgroundResource(R.drawable.nbahigh);
break;
case MotionEvent.ACTION_UP:
NBA.setBackgroundResource(R.drawable.nba);
//i= new Intent("idss.sportslive.ALL");
i.putExtra("url", 1);
startActivity(i);
break;
}
return false;
}
});
//MLB
MLB.setOnTouchListener( new OnTouchListener()
{
@Override
public boolean onTouch(View arg0, MotionEvent event) {
// TODO Auto-generated method stub
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
MLB.setBackgroundResource(R.drawable.mlbhigh);
break;
case MotionEvent.ACTION_UP:
MLB.setBackgroundResource(R.drawable.mlb);
//i= new Intent("idss.sportslive.ALL");
i.putExtra("url", 2);
startActivity(i);
break;
}
return false;
}
});
//NCAA
NCAA.setOnTouchListener( new OnTouchListener()
{
@Override
public boolean onTouch(View arg0, MotionEvent event) {
// TODO Auto-generated method stub
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
NCAA.setBackgroundResource(R.drawable.ncaahigh);
break;
case MotionEvent.ACTION_UP:
NCAA.setBackgroundResource(R.drawable.ncaa);
//i= new Intent("idss.sportslive.ALL");
i.putExtra("url", 3);
startActivity(i);
break;
}
return false;
}
});
}
}
分析器
public class All extends Activity {
List headlines;
List links;
static Context c;
ProgressDialog pd;
List team1l,score1l,team2l,score2l,matchtype;
String url1[]={ "http://www.mpiii.com/scores/nfl.php/",
"http://www.mpiii.com/scores/nba.php/",
"http://www.mpiii.com/scores/mlb.php/",
"http://www.mpiii.com/scores/ncaa.php/"};
;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.listview_main);
pd= new ProgressDialog(this);
pd.setMessage("Loading....");
headlines = new ArrayList();
links = new ArrayList();
team1l= new ArrayList();
score1l= new ArrayList();
team2l= new ArrayList();
score2l= new ArrayList();
matchtype= new ArrayList();
c= this;
new TheTask().execute();
//System.out.println("URL iSSSSSSSSSSS"+d.get("url"));
}
class TheTask extends AsyncTask<Void, Void, Void>{
Bundle d;
URL url ;
@Override
protected void onPreExecute() {
//Intent intent= new Intent();
d= ((Activity) c).getIntent().getExtras();
pd.show();
}
@Override
protected Void doInBackground(Void... params) {
try {
if(d.get("url").toString().equals("0"))
{
url = new URL(url1[0]);
}
if(d.get("url").toString().equals("1"))
{
url = new URL(url1[1]);
}
if(d.get("url").toString().equals("2"))
{
url = new URL(url1[2]);
}
if(d.get("url").toString().equals("3"))
{
url = new URL(url1[3]);
}
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(false);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput(url.openConnection().getInputStream(), "UTF_8");
//xpp.setInput(getInputStream(url), "UTF-8");
boolean insideItem = false;
// Returns the type of current event: START_TAG, END_TAG, etc..
int eventType = xpp.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
if (xpp.getName().equalsIgnoreCase("item")) {
insideItem = true;
} else if (xpp.getName().equalsIgnoreCase("title")) {
if (insideItem)
headlines.add(xpp.nextText()); //extract the headline
} else if (xpp.getName().equalsIgnoreCase("link")) {
if (insideItem)
links.add(xpp.nextText()); //extract the link of article
}
}else if(eventType==XmlPullParser.END_TAG && xpp.getName().equalsIgnoreCase("item")){
insideItem=false;
}
eventType = xpp.next(); //move to next element
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
for(int i=0;i<headlines.size();i++)
{
String s=headlines.get(i).toString();
Pattern pc = Pattern.compile("([a-zA-Z ]+)\\s+(\\d+)\\s+([a-zA-Z ]+)\\s+(\\d+)\\s+\\((\\w+)\\)");
Matcher matcher = pc.matcher(s);
while (matcher.find( ))
{
String team1 = matcher.group(1);
String score1 = matcher.group(2);
String team2 = matcher.group(3);
String score2 = matcher.group(4);
String result = matcher.group(5);
team1l.add(team1);
score1l.add(score1);
team2l.add(team2);
score2l.add(score2);
matchtype.add(result);
System.out.println( team1 + " scored " + score1 + ", " + team2 + " scored " + score2 + ", which was " + result);
}
}
return null;
}
@Override
protected void onPostExecute(Void result) {
setContentView(R.layout.listview_main);
if(CheckNetwork.isInternetAvailable(c))
{
if(team1l.isEmpty())
{
Toast.makeText(c, "No data Available now. Try again Later", 1000).show();
finish();
}
{
ListView lv= (ListView) findViewById(R.id.list1);
lv.setAdapter(new CustomAdapter(getApplicationContext(),team1l,score1l,team2l,score2l,matchtype,links));
//setContentView(R.layout.contentcatalog);
// setUI();
pd.dismiss();
}
}
else
{
Toast.makeText(c, "Check Network Connection!. Try again Later", 1000).show();
finish();
}
}
}
}
我不确定它是否是正确的方法..我有类似的要求根据按钮点击解析rss feed。希望这有帮助