I have an application where i need to download a large amount of data via a SOAP call to a webservice into the application when it is first run. The response is then sent to a function which converts the XML and stores the data in a db file.
The data is more than 16MB in size and i have a java.lang.OutOfMemoryError everytime.
Modifying the webservice to give out smaller amounts of data is not an option.
Is there a way to be able to download the large data? Something like an InputStream perhaps?
This is my code
public Protocol[] getProtocols() {
String METHOD_NAME = "GetProtocols";
String SOAP_ACTION = "urn:protocolpedia#GetProtocols";
Log.d("service", "getProtocols");
SoapObject response = invokeMethod(METHOD_NAME, SOAP_ACTION);
return retrieveProtocolsFromSoap(response);
}
private SoapObject invokeMethod(String methodName, String soapAction) {
Log.d(TAG, "invokeMethod");
SoapObject request = GetSoapObject(methodName);
SoapSerializationEnvelope envelope = getEnvelope(request);
return makeCall(envelope, methodName, soapAction);
}
Can anyone suggest what should be done in this case?
Thanks and regards Mukul
Just an update, I found that the "call" method in AndroidHttpTransport was running out of memory at this line -
if (debug) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[256];
while (true) {
int rd = is.read(buf, 0, 256);
if (rd == -1)
break;
bos.write(buf, 0, rd);
}
bos.flush();
buf = bos.toByteArray(); //Goes out of memory here
responseDump = new String(buf);
is.close();
is = new ByteArrayInputStream(buf);
the call to toByteArray takes a lot of memory, so to overcome this, instead of converting the response to a byte array, i now directly write it to an XML file, and this is saved at a location of my choice. Here -
if (debug) {
FileOutputStream bos = new FileOutputStream("/data/data/com.mypackage.myapp/response.xml");
byte[] buf = new byte[1048576];
int current = 0; int i=0; int newCurrent = 0;
while ((current = inputStream.read(buf)) != -1) {
newCurrent = newCurrent + current;
Log.d("current", "Current = " + current + " total = "+newCurrent+" i = "+i++);
bos.write(buf, 0, current);
}
bos.flush();
}
The device no longer runs out of memory, and i have a custom parse method that takes this XML and writes it to the DB.