抱歉麻烦各位了，本人大四狗，目前在看安卓开发，学习mars老师的音乐播放器时遇到了
个问题，就是设置了SimpleAdapter之后仍然无法显示歌名的内容，只显示了个空白的
TEXTVIEW，我研究了无数次依旧没有发现问题在哪，因此来求教各位大神
附上全部代码，没有错误信息，就是显示不出来，每一步调试过确定都有值
代码如下
package com.example.android_mp3;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import com.download.HttpDownloader;
import com.model.Mp3Info;
import com.xml.Mp3ListContentHandler;
import android.app.ListActivity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;
public class MainActivity extends ListActivity {
private static final int UPDATE = 1;
private static final int ABOUT = 2;
private List<Mp3Info> mp3Infos = null;
/*
* 用户点击menu按钮后调用，可加入自己的按钮控件
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO 自动生成的方法存根
// 组id，物品id，排序，显示内容
menu.add(0, UPDATE, 1, R.string.mp3list_update);
menu.addSubMenu(0, ABOUT, 2, R.string.mp3list_about);
return super.onCreateOptionsMenu(menu);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new Thread(r).start();
// updateListView();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == UPDATE) {
}
else if (item.getItemId() == ABOUT) {
System.out.println("1");
// updateListView();
}
return super.onOptionsItemSelected(item);
}
// public void updateListView() {
// new Thread(new Runnable() {
//
// @Override
// public void run() {
// // TODO 自动生成的方法存根
// String xml = downloadXML("http://192.168.88.100:8080/mp3/resources.xml");
// System.out.println("XML------>");
// System.out.println(xml);
// System.out.println(Thread.currentThread().getName());
// mp3Infos = parse(xml);
// Message msg = Message.obtain();
// msg.sendToTarget();
// }
// }) .start();
// List<HashMap<String, String>> list = new ArrayList<HashMap<String,
// String>>();
// for (Iterator iterator = mp3Infos.iterator(); iterator.hasNext();) {
// Mp3Info mp3Info = (Mp3Info) iterator.next();
// HashMap<String, String> map = new HashMap<String, String>();
// map.put("mp3_name", mp3Info.getMp3Name());
// map.put("mp3_size", mp3Info.getMp3Size());
// list.add(map);
// }
// SimpleAdapter adapter = new SimpleAdapter(this, list,
// R.layout.mp3info_xml, new String[] { "mp3_name", "mp3_size" },
// new int[] { R.id.mp3_name, R.id.mp3_size });
// setListAdapter(adapter);
// }
private Handler handler = new Handler() {
public void handleMessage(Message msg) {
// 显示列表
showList();
}
};
Runnable r = new Runnable() {
public void run() {
String xml = downloadXML("http://192.168.88.100:8080/mp3/resources.xml");
System.out.println("XML------>");
System.out.println(xml);
// 解析下载的XML文件
mp3Infos = parse(xml);
Message msg = handler.obtainMessage();
msg.sendToTarget();
}
};
public void showList() {
List<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();
for (Iterator iterator = mp3Infos.iterator(); iterator.hasNext();) {
Mp3Info mp3Info = (Mp3Info) iterator.next();
HashMap<String, String> map = new HashMap<String, String>();
map.put("mp3_name", mp3Info.getMp3Name());
map.put("mp3_size", mp3Info.getMp3Size());
list.add(map);
}
SimpleAdapter simpleAdapter = new SimpleAdapter(MainActivity.this,
list, R.layout.mp3info_xml,
new String[] { "mp3Name", "mp3Size" }, new int[] {
R.id.mp3_name, R.id.mp3_size });
setListAdapter(simpleAdapter);
}
private String downloadXML(String urlString) {
HttpDownloader httpDownloader = new HttpDownloader();
String result = httpDownloader.download(urlString);
return result;
}
private List<Mp3Info> parse(String xmlStr) {
SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
List<Mp3Info> infos = new ArrayList<Mp3Info>();
try {
XMLReader xmlReader = saxParserFactory.newSAXParser()
.getXMLReader();
Mp3ListContentHandler mp3ListContentHandler = new Mp3ListContentHandler(
infos);
xmlReader.setContentHandler(mp3ListContentHandler);
xmlReader.parse(new InputSource(new StringReader(xmlStr)));
for (Iterator iterator = infos.iterator(); iterator.hasNext();) {
Mp3Info mp3Info = (Mp3Info) iterator.next();
System.out.println(mp3Info);
}
} catch (SAXException e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
return infos;
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// Mp3Info mp3Info = mp3Infos.get(position);
// System.out.println("----->mp3info" + mp3Info);
super.onListItemClick(l, v, position, id);
}
}
xml的
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingBottom="1dip"
android:paddingLeft="10dip"
android:paddingRight="10dip"
android:paddingTop="1dip">
<TextView
android:id="@+id/mp3_name"
android:layout_width="180dip"
android:layout_height="30dip"
android:textSize="10pt"
/>
<TextView
android:id="@+id/mp3_size"
android:layout_width="180dip"
android:layout_height="30dip"
android:textSize="10pt"
/>
</LinearLayout>
调试的是有值的
啊啊啊啊啊啊弄了好久啊，谁知道什么问题的帮帮我啊
