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我的应用程序正在从网页上的Xml文件中获取数据。该日期被放置在一个listView中。在XML文件中，每个项目都有一个指向图像的链接。我需要一些帮助，找出将图像从xml文件与文本一起放入listView的最简单方法。帮助混合文本和图像列表查看
在我的代码中，我刚刚在布局文件中的android：src =“”中放置了一个静态图像。
截图：
XMLFILE：
http://roskilde-festival.dk/typo3conf/ext/tcpageheaderobjects/xml/bandobjects_251_uk.xml
MainClass：
package com.bandreminder;
import java.util.ArrayList;
import java.util.HashMap;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import android.app.ListActivity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class bandR extends ListActivity {
private ConnectivityManager connMgr;
private android.net.NetworkInfo network_info;
private boolean blnNetworkAccess=false;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listplaceholder);
connMgr = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
network_info = connMgr.getActiveNetworkInfo();
if(network_info != null && network_info.isConnectedOrConnecting()) {
blnNetworkAccess = true;
}
if(blnNetworkAccess) {
fetchData();
}
else {
Toast.makeText(bandR.this, "No Internet connection, please enable", Toast.LENGTH_LONG).show();
}
}
public void onResume(){
super.onResume();
if(network_info != null && network_info.isConnectedOrConnecting()) {
Log.w("resume", ""+network_info);
}
else {
Toast.makeText(bandR.this, "No Internet connection, please enable", Toast.LENGTH_LONG).show();
}
}
public void onPause(){
super.onPause();
blnNetworkAccess = false;
Log.w("onPause", "test");
}
private void fetchData() {
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
Integer numResults;
String xml = XmlHandler.getXML();
Document doc = XmlHandler.XMLfromString(xml);
numResults = XmlHandler.numResults(doc);
if((numResults <= 0)){
Toast.makeText(bandR.this, "No Bands found", Toast.LENGTH_LONG).show();
finish();
}
NodeList nodes = doc.getElementsByTagName("item");
for (int i = 0; i < nodes.getLength(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element)nodes.item(i);
map.put("artistName", "Artist Name: "+ XmlHandler.getValue(e, "artistName"));
map.put("country", "Country: " + XmlHandler.getValue(e, "country"));
map.put("scene", "Scene: " + XmlHandler.getValue(e, "scene"));
map.put("tidspunkt", "Tidspunkt: " + XmlHandler.getValue(e, "tidspunkt"));
mylist.add(map);
}
ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.main,
new String[] { "artistName", "country", "scene","tidspunkt" },
new int[] { R.id.item_artistname, R.id.item_country,R.id.scene ,R.id.tidspunkt});
setListAdapter(adapter);
final ListView lv = getListView();
lv.setTextFilterEnabled(true);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
@SuppressWarnings("unchecked")
HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position);
Toast.makeText(bandR.this, "artistName '" + o.get("artistName") + "' was clicked.", Toast.LENGTH_LONG).show();
}
});
}
}
XMLHandler类别：
package com.bandreminder;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.URL;
import java.net.URLConnection;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import android.util.Log;
public class XmlHandler{
public static boolean connected;
public boolean getConnected(){
return connected;
}
public final static Document XMLfromString(String xml){
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader(xml));
doc = db.parse(is);
} catch (ParserConfigurationException e) {
System.out.println("XML parse error: " + e.getMessage());
return null;
} catch (SAXException e) {
System.out.println("Wrong XML file structure: " + e.getMessage());
return null;
} catch (IOException e) {
System.out.println("I/O exeption: " + e.getMessage());
return null;
}
return doc;
}
/** Returns element value
* @param elem element (it is XML tag)
* @return Element value otherwise empty String
*/
public final static String getElementValue(Node elem) {
Node kid = null;
if(elem != null){
if (elem.hasChildNodes()){
for(kid = elem.getFirstChild(); kid != null; kid = kid.getNextSibling()){
if(kid.getNodeType() == Node.TEXT_NODE ){
return kid.getNodeValue();
}
}
}
else
return elem.getNodeValue();
}
return "";
}
public static String getXML(){
;
String line = null;
StringBuilder result = new StringBuilder();
try {
// Send data
URL url = new URL("http://roskilde-festival.dk/typo3conf/ext/tcpageheaderobjects/xml/bandobjects_251_uk.xml");
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
// Get the response
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
while((line = rd.readLine()) != null){
result.append(line);
}
//Close
rd.close();
} catch (Exception e){
connected = false;
}
return result.toString();
}
public static int numResults(Document doc){
Node results = doc.getDocumentElement();
int res = -1;
try{
res += results.getChildNodes().getLength();
}catch(Exception e){
Log.w("Exception numresults", ""+e.getMessage());
res = -1;
}
Log.w("numres", ""+String.valueOf(res));
return res-1;
}
public static String getValue(Element item, String str) {
NodeList n = item.getElementsByTagName(str);
Log.w("element", ""+n.item(0).getTextContent());
//return XmlHandler.getElementValue(n.item(0));
return n.item(0).getTextContent();
}
}
布局：
listplaceholder：
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="@id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawSelectorOnTop="false" />
<TextView
android:id="@id/android:empty"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="No data"/>
</LinearLayout>
主要布局：
在XML文件<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="7dp"
android:id="@+id/layout"
>
<TextView
android:id="@+id/item_artistname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:padding="2dp"
android:textSize="15dp" />
<TextView
android:id="@+id/item_country"
android:layout_below="@id/item_artistname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp"
android:textSize="13dp" />
<TextView
android:id="@+id/scene"
android:layout_below="@id/item_country"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp"
android:textSize="13dp" />
<TextView
android:id="@+id/tidspunkt"
android:layout_below="@id/scene"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp"
android:textSize="13dp" />
<ImageView
android:id="@+id/img"
android:layout_below="@id/item_artistname"
android:layout_alignParentRight="true"
android:src="@drawable/abe"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</RelativeLayout>