我在 android 中构建了一个小型应用程序。我使用 XML 拉解析器从使用 url 的 xml 文件中检索数据。问题是当我在模拟器上测试应用程序时它工作正常但是当我在真实设备上测试它时它表明应用程序已意外停止。强制关闭。这可能是什么原因?请帮助我。
08-20 16:07:30.070 E/AndroidRuntime(10349): FATAL EXCEPTION: main
08-20 16:07:30.070 E/AndroidRuntime(10349): java.lang.IllegalArgumentException
08-20 16:07:30.070 E/AndroidRuntime(10349): at org.kxml2.io.KXmlParser.setInput(KXmlParser.java:1615)
08-20 16:07:30.070 E/AndroidRuntime(10349): at com.example.androidsample4.UNIXclass.getEventsFromAnXML(UNIXclass.java:84)
08-20 16:07:30.070 E/AndroidRuntime(10349): at com.example.androidsample4.UNIXclass$1.onClick(UNIXclass.java:54)
08-20 16:07:30.070 E/AndroidRuntime(10349): at android.view.View.performClick(View.java:3131)
08-20 16:07:30.070 E/AndroidRuntime(10349): at android.view.View$PerformClick.run(View.java:12035)
08-20 16:07:30.070 E/AndroidRuntime(10349): at android.os.Handler.handleCallback(Handler.java:587)
08-20 16:07:30.070 E/AndroidRuntime(10349): at android.os.Handler.dispatchMessage(Handler.java:92)
08-20 16:07:30.070 E/AndroidRuntime(10349): at android.os.Looper.loop(Looper.java:132)
08-20 16:07:30.070 E/AndroidRuntime(10349): at android.app.ActivityThread.main(ActivityThread.java:4123)
08-20 16:07:30.070 E/AndroidRuntime(10349): at java.lang.reflect.Method.invokeNative(Native Method)
08-20 16:07:30.070 E/AndroidRuntime(10349): at java.lang.reflect.Method.invoke(Method.java:491)
08-20 16:07:30.070 E/AndroidRuntime(10349): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
08-20 16:07:30.070 E/AndroidRuntime(10349): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
08-20 16:07:30.070 E/AndroidRuntime(10349): at dalvik.system.NativeStart.main(Native Method)
08-20 16:07:30.080 W/ActivityManager( 2900): Force finishing activity com.example.androidsample4/.UNIXclass
在 logcat 中获取这个
package com.example.androidsample4;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.XmlResourceParser;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class UNIXclass extends Activity
{
String unixcommands[];
AutoCompleteTextView actv1;
static final String URL="http://cympac.com/apps/xmlfile.xml";
static final String KEY_COMMAND = "command"; // parent node
static final String KEY_WORD = "word";
static final String KEY_EXPLANATION = "explanation";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tv1=(TextView)findViewById(R.id.textView1);
AutoCompleteTextView actv=(AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);
Button b1=(Button)findViewById(R.id.button1);
unixcommands=getResources().getStringArray(R.array.Commands);
ArrayAdapter<String> adapter =new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_list_item_1,unixcommands);
actv1 = (AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);
actv1.setThreshold(1);
actv1.setAdapter(adapter);
b1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v)
{
TextView myXmlContent = (TextView)findViewById(R.id.textView2);
String stringXmlContent = null;
try {
stringXmlContent = getEventsFromAnXML(getBaseContext()); // 54 line
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
Toast.makeText(getBaseContext(), "error:"+e.getMessage(), Toast.LENGTH_SHORT).show();
} catch (IOException e) {
// TODO Auto-generated catch block
Toast.makeText(getBaseContext(), "error:"+e.getMessage(), Toast.LENGTH_SHORT).show();
}
myXmlContent.setText(stringXmlContent);
}
});
}
public String getEventsFromAnXML(Context baseContext) throws XmlPullParserException,IOException
{
StringBuffer stringBuffer=new StringBuffer();
java.net.URL url=new java.net.URL("http://cympac.com/apps/xmlfile.xml");
XmlPullParserFactory factory=XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
XmlPullParser xpp=factory.newPullParser();
xpp.setInput(getInputStream(url),"UTF_8"); //84 line
int eventType = xpp.getEventType();
String word = null;
String tag;
while ((eventType = xpp.next()) != XmlPullParser.END_DOCUMENT)
{
if(XmlPullParser.START_TAG==eventType)
{
tag=xpp.getName();
//stringBuffer.append("\n"+tag);
if (tag.equals("word"))
{
eventType = xpp.next();
word = xpp.getText();
}
else if (tag.equals("explanation"))
{
eventType = xpp.next();
//if ("cancel".equals(word))
if(actv1.getText().toString().equals(word))
{
stringBuffer.append("\n" + xpp.getText());
}
}
}
}
return stringBuffer.toString();
}
这是我的代码。我收到 IllegalArgument 异常
public InputStream getInputStream(java.net.URL url2)
{
try
{
return url2.openConnection().getInputStream();
}
catch(Exception e)
{
return null;
}
}
}