CN103699376A - SAX (Simple Api For Xml) parse error solving method based on android platform - Google Patents

Abstract

The invention provides an SAX (Simple API for XML) parse error solving method based on an android platform. The method is characterized by comprising the following steps: (a) allocating a storage unit for the value of each element of XML data; (b) eliminating the values in the storage units of the step (a); (c) starting XML document resolving; (d) splicing the values of the elements which conform to labels and storing the values into the corresponding storage units in the step (a), wherein the splicing operation is not performed in the prior art; (e) when meeting a label which indicates that a section of attribute is over, emptying the storage units in the step (a) for the next treatment. The method provided by the invention has the following advantages that the problem that the XML data can not be completely resolved by use of the SAX in an application development process under the android platform, and a developer can obtain complete data from the XML data by utilizing the method provided by the invention.

Description

Based on android platform SAX parse error way to solve the problem

Technical field

The present invention relates to a kind of based on android platform SAX parse error way to solve the problem, be applicable to Android system application development field, if relate to the parsing of XML file in application development process, it is a kind of mode that SAX resolves, in resolving, may run into the situation of parse error, this technology is obtained the problem that label data is incomplete when resolving a kind of technical solution scheme is provided.

Background technology

XML is one group of standard that W3C formulates, and is used for defined label language, and its major advantage is extensibility, from it birth till now, obtained people and supported widely and apply.

The parsing of so-called XML file refers to: representing that a structureless character string of XML document is converted to the process of the structural components that meets XML grammer.

SAX(Simple API for XML) XML simple application routine interface is that a public XML document based on event is resolved standard.It usings event as the pattern of analyzing XML file, and it changes into a series of event by XML file, by different event handlers, is decided and how to be processed.

The principle of work of SAX is briefly carried out sequential scanning to document exactly, when scanning the local time notification events such as document (document) beginning and end, element (element) beginning and end, document (document) end, process function, by event handling function, do corresponding actions, then continue same scanning, until document finishes.

SAX is the resolver that a kind of committed memory is few and resolution speed is fast, what it adopted is that event starts, it does not need to resolve complete document, but see according to content order whether certain part of document meets xml grammer, if meet and just trigger corresponding event, so-called event is exactly a little callback methods (callback), and these methods are defined in ContentHandler.Its main method below:

StartDocument: just trigger this event and call this method and can do therein a little pre-service work when running into document.

StartElement:(String namespaceURI, String localName, String qName, Attributes atts) when meeting beginning label, will trigger this method.

EndElement(String uri, String localName, String name): when running into end-tag, trigger this event, call this method and can do a little aftermaths.

Charachers (char [] ch, int start, int length): trigger this method when running into xml content, can accept content with new String (ch, start, length).

……。

Generally, resolving is above no problem, resolves and can correctly carry out.But occasional makes a mistake, generally all think that SAX resolving is roughly as follows:

startDocument -> startElement ->?characters?->?endElement?->?endDocument；

Does startElement read start-tag, and endElement reads end-tag, characters? be to read its value, this is quite right, but generally all thinks characters Exactly-once, and has once just read full content.Wrong just wrong at this!

Characters probably can carry out repeatedly, resolving <url>http: during //img7.ph.126.net/xthf6CciOopDhbEj2nPB3A==/6598208860702643437.jpg</url>, just once found that characters had carried out twice, content " http://img7.ph.126.net/xthf6CciOopDhbEj2nPB3A==/6598208860702643437.jpg " is read at twice, with the net result of that mode above, be exactly url=http://img7.ph.126.net/xthf6CciOopDhbEj2nPB3A==/6598, while using this URL address to read picture in that application, will make mistakes.

Summary of the invention

The object of the invention is to provide a kind of based on android platform SAX parse error way to solve the problem, is to solve the infull problem of resolution data of using SAX analyzing XML to run in android platform application.

Technical scheme of the present invention is: take intelligent operating system android as basis, take SAX as analyzing XML technical approach.The whole thinking that solves is that the data after the parsing of XML are carried out to corresponding correct splicing, thereby makes the data integrity after parsing.

Advantage of the present invention is: under the android platform of having determined, in application development process, use the infull problem of SAX analyzing XML data, make developer can use the present invention from XML data, to obtain complete data.

Embodiment

Embodiment 1: one of implementation method of the present invention comprises the following steps:

(a) give the value memory allocated unit of each element of xml data;

(b) value of storage unit in emptying step (a);

(c) XML document is resolved and is started;

(d) value that meets the element of label spliced and store in the corresponding stored unit in step (a) (prior art is the operation to splicing not) into;

(e), while running into the label that one section of attribute of sign finishes, the storage unit in step (a) is emptied, in order to process next time.

Claims (1)

1. based on an android platform SAX parse error way to solve the problem, it is characterized in that, comprise the following steps:

(a) give the value memory allocated unit of each element of xml data;

(b) value of storage unit in emptying step (a);

(c) XML document is resolved and is started;

(d) value that meets the element of label spliced and store in the corresponding stored unit in step (a);

(e), while running into the label that one section of attribute of sign finishes, the storage unit in step (a) is emptied, in order to process next time.