我正在制作一个android应用程序，首先我将XML从网络保存在sdcard上，然后在尝试解析该XML但出现运行时错误之后成功保存。我在下面添加了我的 LogCat。
这是我的代码，
protected String doInBackground(String... params)
{
// TODO Auto-generated method stub
try {
URL url = new URL(data);
stringList=new ArrayList<String>();
stringList1=new ArrayList<String>();
//create the new connection
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
//set up some things on the connection
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
//and connect!
urlConnection.connect();
//set the path where we want to save the file
//in this case, going to save it on the root directory of the
//sd card.
File SDCardRoot = new File("/sdcard/");
//create a new file, specifying the path, and the filename
//which we want to save the file as.
File file = new File(SDCardRoot,"hello.xml");
//this will be used to write the downloaded data into the file we created
FileOutputStream fileOutput = new FileOutputStream(file);
//this will be used in reading the data from the internet
InputStream inputStream = urlConnection.getInputStream();
//this is the total size of the file
int totalSize = urlConnection.getContentLength();
//variable to store total downloaded bytes
int downloadedSize = 0;
//create a buffer...
byte[] buffer = new byte[1024];
int bufferLength = 0; //used to store a temporary size of the buffer
//now, read through the input buffer and write the contents to the file
while ( (bufferLength = inputStream.read(buffer)) > 0 )
{
//add the data in the buffer to the file in the file output stream (the file on the sd card
fileOutput.write(buffer, 0, bufferLength);
//add up the size so we know how much is downloaded
downloadedSize += bufferLength;
int progress=(int)(downloadedSize*100/totalSize);
//this is where you would do something to report the prgress, like this maybe
//updateProgress(downloadedSize, totalSize);
}
//close the output stream when done
fileOutput.close();
InputStream is = new FileInputStream(file.getPath());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(is));
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("Table");
for (int i = 0; i < nodeList.getLength(); i++)
{
Node node = nodeList.item(i);
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("State");
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
state=((Node) nameList.item(0)).getNodeValue();
Element fstElmnt1 = (Element) node;
NodeList nameList1 = fstElmnt1.getElementsByTagName("District");
Element nameElement1 = (Element) nameList1.item(0);
nameList1 = nameElement1.getChildNodes();
district=((Node) nameList1.item(0)).getNodeValue();
if(!stringList.contains(state) && !stringList1.contains(district))
{
stringList.add(state);
stringList1.add(district);
DatabaseHandler mydb = new DatabaseHandler(getApplicationContext());
// inserting new label into database
mydb.insertData(state,district);
//mydb.close();
}
//System.out.println("State : "+((Node) nameList.item(0)).getNodeValue());
}
loadStateSpinnerData();
loadDistrictSpinnerData();
}
catch (MalformedURLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
Toast.makeText(getBaseContext(), "No Internet Connection!", Toast.LENGTH_LONG).show();
}
catch (ParserConfigurationException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (SAXException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
还有我的 LogCat，
10-23 13:02:49.059: E/AndroidRuntime(8678): FATAL EXCEPTION: AsyncTask #1
10-23 13:02:49.059: E/AndroidRuntime(8678): java.lang.RuntimeException: An error occured while executing doInBackground()
10-23 13:02:49.059: E/AndroidRuntime(8678): at android.os.AsyncTask$3.done(AsyncTask.java:200)
10-23 13:02:49.059: E/AndroidRuntime(8678): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
10-23 13:02:49.059: E/AndroidRuntime(8678): at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
10-23 13:02:49.059: E/AndroidRuntime(8678): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
10-23 13:02:49.059: E/AndroidRuntime(8678): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
10-23 13:02:49.059: E/AndroidRuntime(8678): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
10-23 13:02:49.059: E/AndroidRuntime(8678): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
10-23 13:02:49.059: E/AndroidRuntime(8678): at java.lang.Thread.run(Thread.java:1019)
10-23 13:02:49.059: E/AndroidRuntime(8678): Caused by: java.lang.ClassCastException: org.apache.harmony.xml.dom.TextImpl
10-23 13:02:49.059: E/AndroidRuntime(8678): at com.example.androidspinnerfromsqlite.AndroidSpinnerFromSQLiteActivity$XmlParsing.doInBackground(AndroidSpinnerFromSQLiteActivity.java:190)
10-23 13:02:49.059: E/AndroidRuntime(8678): at com.example.androidspinnerfromsqlite.AndroidSpinnerFromSQLiteActivity$XmlParsing.doInBackground(AndroidSpinnerFromSQLiteActivity.java:1)
10-23 13:02:49.059: E/AndroidRuntime(8678): at android.os.AsyncTask$2.call(AsyncTask.java:185)
10-23 13:02:49.059: E/AndroidRuntime(8678): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
10-23 13:02:49.059: E/AndroidRuntime(8678): ... 4 more
10-23 13:02:56.189: E/WindowManager(8678): Activity com.example.androidspinnerfromsqlite.AndroidSpinnerFromSQLiteActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@405233a8 that was originally added here
10-23 13:02:56.189: E/WindowManager(8678): android.view.WindowLeaked: Activity com.example.androidspinnerfromsqlite.AndroidSpinnerFromSQLiteActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@405233a8 that was originally added here
10-23 13:02:56.189: E/WindowManager(8678): at android.view.ViewRoot.<init>(ViewRoot.java:263)
10-23 13:02:56.189: E/WindowManager(8678): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
10-23 13:02:56.189: E/WindowManager(8678): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
10-23 13:02:56.189: E/WindowManager(8678): at android.view.Window$LocalWindowManager.addView(Window.java:424)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.Dialog.show(Dialog.java:241)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.ProgressDialog.show(ProgressDialog.java:107)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.ProgressDialog.show(ProgressDialog.java:90)
10-23 13:02:56.189: E/WindowManager(8678): at com.example.androidspinnerfromsqlite.AndroidSpinnerFromSQLiteActivity$XmlParsing.onPreExecute(AndroidSpinnerFromSQLiteActivity.java:78)
10-23 13:02:56.189: E/WindowManager(8678): at android.os.AsyncTask.execute(AsyncTask.java:391)
10-23 13:02:56.189: E/WindowManager(8678): at com.example.androidspinnerfromsqlite.AndroidSpinnerFromSQLiteActivity.onCreate(AndroidSpinnerFromSQLiteActivity.java:57)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
10-23 13:02:56.189: E/WindowManager(8678): at android.os.Handler.dispatchMessage(Handler.java:99)
10-23 13:02:56.189: E/WindowManager(8678): at android.os.Looper.loop(Looper.java:130)
10-23 13:02:56.189: E/WindowManager(8678): at android.app.ActivityThread.main(ActivityThread.java:3687)
10-23 13:02:56.189: E/WindowManager(8678): at java.lang.reflect.Method.invokeNative(Native Method)
10-23 13:02:56.189: E/WindowManager(8678): at java.lang.reflect.Method.invoke(Method.java:507)
10-23 13:02:56.189: E/WindowManager(8678): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
10-23 13:02:56.189: E/WindowManager(8678): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
10-23 13:02:56.189: E/WindowManager(8678): at dalvik.system.NativeStart.main(Native Method)
不知道到底哪里出错了。
请帮忙。
谢谢。