我想为Android开发RSS FEED阅读器。我正在学习本教程 http://www.ibm.com/developerworks/xml/tutorials/x-androidrss/downloads.html
我没有在程序中收到任何错误但没有获得所需的输出
这是我的logcat：
07-20 16:12:23.531: ERROR/Zygote(33): setreuid() failed. errno: 2
07-20 16:12:35.101: ERROR/Zygote(33): setreuid() failed. errno: 17
07-20 16:12:37.031: ERROR/BatteryService(59): usbOnlinePath not found
07-20 16:12:37.031: ERROR/BatteryService(59): batteryVoltagePath not found
07-20 16:12:37.031: ERROR/BatteryService(59): batteryTemperaturePath not found
07-20 16:12:37.061: ERROR/SurfaceFlinger(59): Couldn't open /sys/power/wait_for_fb_sleep or /sys/power/wait_for_fb_wake
07-20 16:12:47.381: ERROR/EventHub(59): could not get driver version for /dev/input/mouse0, Not a typewriter
07-20 16:12:47.412: ERROR/EventHub(59): could not get driver version for /dev/input/mice, Not a typewriter
07-20 16:12:47.812: ERROR/System(59): Failure starting core service
07-20 16:12:47.812: ERROR/System(59): java.lang.SecurityException
07-20 16:12:47.812: ERROR/System(59): at android.os.BinderProxy.transact(Native Method)
07-20 16:12:47.812: ERROR/System(59): at android.os.ServiceManagerProxy.addService(ServiceManagerNative.java:146)
07-20 16:12:47.812: ERROR/System(59): at android.os.ServiceManager.addService(ServiceManager.java:72)
07-20 16:12:47.812: ERROR/System(59): at com.android.server.ServerThread.run(SystemServer.java:184)
07-20 16:12:49.591: ERROR/SoundPool(59): error loading /system/media/audio/ui/Effect_Tick.ogg
07-20 16:12:49.591: ERROR/SoundPool(59): error loading /system/media/audio/ui/KeypressStandard.ogg
07-20 16:12:49.602: ERROR/SoundPool(59): error loading /system/media/audio/ui/KeypressSpacebar.ogg
07-20 16:12:49.612: ERROR/SoundPool(59): error loading /system/media/audio/ui/KeypressDelete.ogg
07-20 16:12:49.622: ERROR/SoundPool(59): error loading /system/media/audio/ui/KeypressReturn.ogg
07-20 16:12:52.672: ERROR/ThrottleService(59): Could not open GPS configuration file /etc/gps.conf
07-20 16:12:54.551: ERROR/logwrapper(145): executing /system/bin/tc failed: No such file or directory
07-20 16:12:54.691: ERROR/logwrapper(147): executing /system/bin/tc failed: No such file or directory
07-20 16:12:54.781: ERROR/logwrapper(149): executing /system/bin/tc failed: No such file or directory
07-20 16:13:17.789: ERROR/HierarchicalStateMachine(59): TetherMaster - unhandledMessage: msg.what=3
07-20 16:13:38.669: INFO/ActivityManager(59): Start proc com.svox.pico for broadcast com.svox.pico/.VoiceDataInstallerReceiver: pid=268 uid=10028 gids={}
07-20 16:13:38.689: WARN/RecognitionManagerService(59): no available voice recognition services found
07-20 16:13:39.370: DEBUG/dalvikvm(59): GC_EXPLICIT freed 9347 objects / 593752 bytes in 302ms
07-20 16:13:39.590: DEBUG/dalvikvm(165): GC_EXPLICIT freed 2883 objects / 156272 bytes in 1275ms
07-20 16:13:39.659: INFO/installd(35): unlink /data/dalvik-cache/data@app@com.msi.androidrss-1.apk@classes.dex
07-20 16:13:39.782: DEBUG/AndroidRuntime(118): Shutting down VM
07-20 16:13:39.789: DEBUG/jdwp(118): adbd disconnected
07-20 16:13:39.809: INFO/AndroidRuntime(118): NOTE: attach of thread 'Binder Thread #3' failed
07-20 16:13:39.879: INFO/ActivityThread(268): Publishing provider com.svox.pico.providers.SettingsProvider: com.svox.pico.providers.SettingsProvider
07-20 16:13:40.131: DEBUG/KeyguardViewMediator(59): pokeWakelock(5000)
07-20 16:13:40.429: DEBUG/KeyguardViewMediator(59): pokeWakelock(5000)
07-20 16:13:40.511: DEBUG/AndroidRuntime(278): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
07-20 16:13:40.511: DEBUG/AndroidRuntime(278): CheckJNI is ON
07-20 16:13:41.740: INFO/ActivityManager(59): Displayed activity com.android.launcher/com.android.launcher2.Launcher: 50234 ms (total 50234 ms)
07-20 16:13:42.340: DEBUG/AndroidRuntime(278): --- registering native functions ---
07-20 16:13:43.790: INFO/ActivityManager(59): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.msi.androidrss/.ShowDescription }
07-20 16:13:43.890: DEBUG/AndroidRuntime(278): Shutting down VM
07-20 16:13:43.910: DEBUG/jdwp(278): adbd disconnected
07-20 16:13:43.960: INFO/AndroidRuntime(278): NOTE: attach of thread 'Binder Thread #3' failed
07-20 16:13:44.099: INFO/ActivityManager(59): Start proc com.msi.androidrss for activity com.msi.androidrss/.ShowDescription: pid=286 uid=10042 gids={1015}
07-20 16:13:45.939: INFO/ARMAssembler(59): generated scanline__00000077:03545404_00000004_00000000 [ 47 ipp] (67 ins) at [0x2ff7e0:0x2ff8ec] in 7962326 ns
07-20 16:13:46.670: INFO/ActivityManager(59): Displayed activity com.msi.androidrss/.ShowDescription: 2691 ms (total 2691 ms)
这是我的manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.msi.androidrss"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".ShowDescription"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
</intent-filter>
</activity>
</application>
</manifest>
这是我的.java程序之一“RSSReader.java”
package com.msi.androidrss;
import android.app.Activity;
import android.os.Bundle;
import android.view.*;
import android.widget.TextView;
import android.widget.ListView;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AdapterView.OnItemClickListener;
import android.util.Log;
import java.net.URL;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import android.content.Intent;
import com.msi.androidrss.ShowDescription;
public class RSSReader extends Activity implements OnItemClickListener
{
public final String RSSFEEDOFCHOICE = "http://www.ibm.com/developerworks/views/rss/customrssatom.jsp?zone_by=XML&zone_by=Java&zone_by=Rational&zone_by=Linux&zone_by=Open+source&zone_by=WebSphere&type_by=Tutorials&search_by=&day=1&month=06&year=2007&max_entries=20&feed_by=rss&isGUI=true&Submit.x=48&Submit.y=14";
private static final int SELECT = 0;
private static final int REFRESH = 1;
public final String tag = "RSSReader";
private RSSFeed feed = null;
/** Called when the activity is first created. */
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
// go get our feed!
feed = getFeed(RSSFEEDOFCHOICE);
// display UI
UpdateDisplay();
}
private RSSFeed getFeed(String urlToRssFeed)
{
try
{
// setup the url
URL url = new URL(urlToRssFeed);
// create the factory
SAXParserFactory factory = SAXParserFactory.newInstance();
// create a parser
SAXParser parser = factory.newSAXParser();
// create the reader (scanner)
XMLReader xmlreader = parser.getXMLReader();
// instantiate our handler
RSSHandler theRssHandler = new RSSHandler();
// assign our handler
xmlreader.setContentHandler(theRssHandler);
// get our data via the url class
InputSource is = new InputSource(url.openStream());
// perform the synchronous parse
xmlreader.parse(is);
// get the results - should be a fully populated RSSFeed instance, or null on error
return theRssHandler.getFeed();
}
catch (Exception ee)
{
// if we have a problem, simply return null
return null;
}
}
public boolean onCreateOptionsMenu(Menu menu)
{
super.onCreateOptionsMenu(menu);
menu.add(0, RSSReader.SELECT, 0, "Choose RSS Feed").setIcon(android.R.drawable.ic_menu_mapmode);
//menu.add(0,0,"Choose RSS Feed");
//menu.add(0,1,"Refresh");
menu.add(0, RSSReader.REFRESH, 0, "Refresh").setIcon(android.R.drawable.ic_menu_mapmode);
Log.i(tag,"onCreateOptionsMenu");
return true;
}
@Override
public boolean onMenuItemSelected(final int featureId, final MenuItem item) {
switch (item.getItemId()) {
case RSSReader.SELECT:
Log.i(tag,"Set RSS Feed");
return true;
case RSSReader.REFRESH:
Log.i(tag,"Refreshing RSS Feed");
return true;
}
return false;
}
private void UpdateDisplay()
{
TextView feedtitle = (TextView) findViewById(R.id.feedtitle);
TextView feedpubdate = (TextView) findViewById(R.id.feedpubdate);
ListView itemlist = (ListView) findViewById(R.id.itemlist);
if (feed == null)
{
feedtitle.setText("No RSS Feed Available");
return;
}
feedtitle.setText(feed.getTitle());
feedpubdate.setText(feed.getPubDate());
ArrayAdapter<RSSItem> adapter = new ArrayAdapter<RSSItem>(this,android.R.layout.simple_list_item_1,feed.getAllItems());
itemlist.setAdapter(adapter);
itemlist.setOnItemClickListener(this);
itemlist.setSelection(0);
}
public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
Log.i(tag,"item clicked! [" + feed.getItem(position).getTitle() + "]");
Intent itemintent = new Intent(this,ShowDescription.class);
Bundle b = new Bundle();
b.putString("title", feed.getItem(position).getTitle());
b.putString("description", feed.getItem(position).getDescription());
b.putString("link", feed.getItem(position).getLink());
b.putString("pubdate", feed.getItem(position).getPubDate());
itemintent.putExtra("android.intent.extra.INTENT", b);
startActivity(itemintent);
}
}
这是我的.java程序之一“ShowDescription.java”
package com.msi.androidrss;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;
import android.content.Intent;
import android.view.*;
public class ShowDescription extends Activity
{
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.showdescription);
String theStory = null;
Intent startingIntent = getIntent();
if (startingIntent != null)
{
Bundle b = startingIntent.getBundleExtra("android.intent.extra.INTENT");
if (b == null)
{
theStory = "bad bundle?";
}
else
{
theStory = b.getString("title") + "\n\n" + b.getString("pubdate") + "\n\n" + b.getString("description").replace('\n',' ') + "\n\nMore information:\n" + b.getString("link");
}
}
else
{
theStory = "Information Not Found.";
}
TextView db= (TextView) findViewById(R.id.storybox);
db.setText(theStory);
Button backbutton = (Button) findViewById(R.id.back);
backbutton.setOnClickListener(new Button.OnClickListener()
{
public void onClick(View v)
{
finish();
}
});
}
}
作为输出我得到“坏包”，为什么？
帮助!!!
答案 0 :(得分：0)
从您的logcat输出判断，您正在从Launcher启动ShowDescription活动。如果是这种情况 - 难怪它在开始意图中没有任何额外的。
因为就代码而言，只有当从RSSReader Activity启动此活动时才将BundleExtra放入起始意图。
答案 1 :(得分：0)
确保将.RSSReader添加到清单文件中，并将此行添加到清单文件中：
<uses-permission android:name="android.permission.INTERNET" />