private String DOWNFILE = "stations.xml";
File stations;
//////////////////////////////////code to store file
stations = new File(context.getCacheDir(),DOWNFILE);
url="
http://www.permeative.com/projects/TimeShiftRadio/AppData/IndiaRadioStations.xml
";
try{
connection = new URL(url).openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
if (stream == null) {
Log.e(TAG, "Unable to create InputStream for mediaUrl:
"+url);
}
FileOutputStream fos = new FileOutputStream(stations);
byte buf[] = new byte[16 * 1024];
do {
int numread = stream.read(buf);
if (numread <= 0) {
break;
} else {
fos.write(numread);
}
} while (true);
fos.close();
}catch(Exception e){
System.out.println("CANNOT DOWNLOAD STATIONS");
e.printStackTrace();
}
/////////////////////////////////////code to parse xml
try{
if(stations.exists() && stations.canRead()){
ReadXML readXML=new ReadXML();
readXML.readFile(context,stations);
}
}catch(Exception e){
Log.e(TAG, "unable to read from file " + e);
e.printStackTrace();
}
/////////////////////////////////////////////////////ReadXML.java looks like
this
public class ReadXML{
private String DOWNFILE = "stations";
public void readFile (Context context,File file){
try {
DocumentBuilderFactory docBuilderFactory =
DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder =
docBuilderFactory.newDocumentBuilder();
// File temp = new File(context.getCacheDir(),DOWNFILE);
// file=temp;
// Document doc = docBuilder.parse (new File(file.getName()));
Document doc = docBuilder.parse (file);
// normalize text representation********************getting
error here,,telling filenotfound
doc.getDocumentElement ().normalize ();
System.out.println ("Root element of the doc is " +
doc.getDocumentElement().getNodeName());
}
}
I am getting error in ReadXML.java file
doc.getDocumentElement ().normalize ();
On Thu, Feb 25, 2010 at 4:11 PM, Upendra Chintala <
[email protected]> wrote:
> Post you code here, that may help us to provide some solution to you.
> Without looking at the code it's hard to imagine where is that
> NullPointerException?
>
>
> On Thu, Feb 25, 2010 at 4:06 PM, kavitha <[email protected]> wrote:
>
>> Actually I could write file to local cache using InputStreamReader.
>>
>> I am downloading bytes successfully and could write to a file,,,
>>
>> But again if i try to open file and read it,,It is throwing
>> NullPointerException for file.
>>
>>
>> On Thu, Feb 25, 2010 at 4:00 PM, Upendra Chintala <
>> [email protected]> wrote:
>>
>>> A simple search on google would have helped you.
>>>
>>>
>>> http://digiassn.blogspot.com/2008/10/java-simple-httpurlconnection-example.html
>>>
>>> Upendra
>>>
>>>
>>> On Thu, Feb 25, 2010 at 3:55 PM, kavitha <[email protected]> wrote:
>>>
>>>> Any examples please
>>>>
>>>>
>>>> On Thu, Feb 25, 2010 at 3:53 PM, Upendra Chintala <
>>>> [email protected]> wrote:
>>>>
>>>>> You can use HttpURLConnection object to read the file as stream and
>>>>> then store it locally.
>>>>>
>>>>> Thanks,
>>>>> Upendra
>>>>>
>>>>>
>>>>> On Thu, Feb 25, 2010 at 3:49 PM, kavitha <[email protected]> wrote:
>>>>>
>>>>>> first download and keep the file
>>>>>>
>>>>>> then parse it,,,,
>>>>>>
>>>>>> i need to download bcoz when the application launches second time,,i
>>>>>> need to use stored file without re-downloading
>>>>>>
>>>>>>
>>>>>> On Thu, Feb 25, 2010 at 3:47 PM, Sandeep Phansekar <
>>>>>> [email protected]> wrote:
>>>>>>
>>>>>>> want to just download ? or parse the file ?
>>>>>>> --
>>>>>>> Regards
>>>>>>> Sandeep
>>>>>>>
>>>>>>> On Thu, Feb 25, 2010 at 3:39 PM, kavitha <[email protected]>wrote:
>>>>>>>
>>>>>>>> Hi All,
>>>>>>>>
>>>>>>>> Please tell how to download an xml file from url connection in
>>>>>>>> android?
>>>>>>>>
>>>>>>>> Thanks
>>>>>>>>
>>>>>>>> Kavitha
>>>>>>>>
>>>>>>>> --
>>>>>>>> You received this message because you are subscribed to the Google
>>>>>>>> Groups "Android Developers" group.
>>>>>>>> To post to this group, send email to
>>>>>>>> [email protected]
>>>>>>>> To unsubscribe from this group, send email to
>>>>>>>> [email protected]<android-developers%[email protected]>
>>>>>>>> For more options, visit this group at
>>>>>>>> http://groups.google.com/group/android-developers?hl=en
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> You received this message because you are subscribed to the Google
>>>>>>> Groups "Android Developers" group.
>>>>>>> To post to this group, send email to
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>>>>>>> To unsubscribe from this group, send email to
>>>>>>> [email protected]<android-developers%[email protected]>
>>>>>>> For more options, visit this group at
>>>>>>> http://groups.google.com/group/android-developers?hl=en
>>>>>>
>>>>>>
>>>>>> --
>>>>>> You received this message because you are subscribed to the Google
>>>>>> Groups "Android Developers" group.
>>>>>> To post to this group, send email to
>>>>>> [email protected]
>>>>>> To unsubscribe from this group, send email to
>>>>>> [email protected]<android-developers%[email protected]>
>>>>>> For more options, visit this group at
>>>>>> http://groups.google.com/group/android-developers?hl=en
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Regards,
>>>>> Upendra
>>>>>
>>>>> --
>>>>> You received this message because you are subscribed to the Google
>>>>> Groups "Android Developers" group.
>>>>> To post to this group, send email to
>>>>> [email protected]
>>>>> To unsubscribe from this group, send email to
>>>>> [email protected]<android-developers%[email protected]>
>>>>> For more options, visit this group at
>>>>> http://groups.google.com/group/android-developers?hl=en
>>>>>
>>>>
>>>> --
>>>> You received this message because you are subscribed to the Google
>>>> Groups "Android Developers" group.
>>>> To post to this group, send email to
>>>> [email protected]
>>>> To unsubscribe from this group, send email to
>>>> [email protected]<android-developers%[email protected]>
>>>> For more options, visit this group at
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>>>>
>>>
>>>
>>>
>>> --
>>> Regards,
>>> Upendra
>>>
>>> --
>>> You received this message because you are subscribed to the Google
>>> Groups "Android Developers" group.
>>> To post to this group, send email to [email protected]
>>> To unsubscribe from this group, send email to
>>> [email protected]<android-developers%[email protected]>
>>> For more options, visit this group at
>>> http://groups.google.com/group/android-developers?hl=en
>>>
>>
>> --
>> You received this message because you are subscribed to the Google
>> Groups "Android Developers" group.
>> To post to this group, send email to [email protected]
>> To unsubscribe from this group, send email to
>> [email protected]<android-developers%[email protected]>
>> For more options, visit this group at
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>>
>
>
>
> --
> Regards,
> Upendra
>
> --
> You received this message because you are subscribed to the Google
> Groups "Android Developers" group.
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> To unsubscribe from this group, send email to
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> For more options, visit this group at
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>
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