Android-platform-based NFC writing and reading method
A reading and writing method and platform technology, applied in the direction of collaborative devices, instruments, computer components, etc., can solve the problems of demanding data writing, not being able to read Chinese, inconvenient reading and recognition, etc., and achieve the freedom of writing high effect
Active Publication Date: 2015-09-16
ZHEJIANG UNIV OF TECH
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Problems solved by technology
[0005] In order to overcome the shortcomings of the existing NFC reading and writing methods, which are inconvenient to read and identify, and have strict requirements for writing data (the data content must be 16 bits, and cannot be in Chinese), the present invention provides a convenient reading, writing NFC reading and writing method based on Android platform with high access freedom and zero damage to NFC card memory
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Embodiment Construction
[0033] The present invention will be further described below in conjunction with the accompanying drawings.
[0034] refer to Figure 1 ~ Figure 3 , a kind of NFC reading and writing method based on Android platform, comprises the following steps:
[0035] 1) Open this application to judge the device status:
[0036] 1.1) First check whether the device supports the NFC function, if not, a prompt box will pop up and exit the application;
[0037] 1.2) If the device supports this function but the NFC function is not enabled, a prompt box will appear to remind you to enable the NFC function of the device, and then proceed to the next step;
[0038] 2) Put the label close to the back of the device and wait for the program to read it;
[0039] 3) NFC card reading operation: When a tag is close, the application will prompt to find an NFC card information, then start the filter in the Android standard configuration file to find the defined application main activity Activity, the u...
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The invention relates to an Android-platform-based near-field-communication (NFC) writing and reading method. Written hexadecimal data are converted into identifiable data based on the table of the American standard code for information interchange, so that the written data can be read and checked conveniently. In terms of data writing, the Chinese support is added and the restriction on the length of the written data is eliminated. The byte type of the data can be processed by using an array element copying method; zero padding is carried out on data with the length less than 16 bits; for data with the length exceeding 16 bits, line changing is carried out automatically and the data are written into a next block, a tail block of a sector is skipped and changing to a next sector is carried out automatically, so that data with any length less than an internal memory of an NFC card can be written. The provided method has advantages of convenient reading, high writing freedom degree, and no damage on the internal memory of the card.
Description
technical field [0001] The invention relates to the fields of external data processing and computer application, in particular to an Android platform-based NFC reading and writing method. Background technique [0002] In recent years, with the rapid development of network and communication technologies, smart phones have played an increasingly important role in people's lives. According to the statistics report of the American market research company IDC, the global mobile phone shipments reached 1.167 billion in 2014. , a year-on-year increase of 25.9% over 2013, and the proportion of smartphones equipped with the Android operating system has reached 75%, ranking first in smartphone shipments. NFC (Near Filed Communication) near-field communication technology is evolved from the integration of non-contact radio frequency identification (RFID) and interconnection technology. It combines inductive card readers, inductive cards and point-to-point functions on a single chip. I...
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IPC IPC(8): G06K17/00
Inventor 张贵军龚伟奇陈铭王宇凯姚俊贺智远周晓根
Owner ZHEJIANG UNIV OF TECH