DocumentBuilder returning NullPointerException when trying to parse XML document in AsynTask

DocumentBuilder returning NullPointerException when trying to parse XML
document in AsynTask

References

Reference NO 1

http://stackoverflow.com/questions/16211733/java-lang-nullpointerexception-in-asynctask

Reference NO 2

http://stackoverflow.com/questions/13261008/android-asynctask-exception

Reference NO 3

http://stackoverflow.com/questions/13717272/not-able-to-get-nodelist-from-asynch-task

Reference NO 4

http://stackoverflow.com/questions/12545841/asynctask-why-is-the-xml-file-not-being-read

Reference NO 5

http://stackoverflow.com/questions/13702009/null-pointer-exception-on-http-response

Reference NO 6

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Reference NO 7

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Reference NO 8

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