XE7 使用 NFC 组件 加入 JAR 的教程 英文 含有代码和图片 2014-09-13.docVIP

/Articles/DelphiXE7NFC/NFC.htm Using NFC in Delphi XE7 Android apps Brian Long Consultancy Training Services Ltd.August 2014 窗体顶端 窗体底端 This is an update to a?Delphi XE6 version?of the same article. Accompanying source files available through this?download link.? Contents Introduction The NFC API The NFC tag dispatch system ACTION_NDEF_DISCOVERED ACTION_TECH_DISCOVERED ACTION_TAG_DISCOVERED Tag dispatch system application structure The NFC foreground dispatch system Practical limitations of Delphi XE7s Android support Controlling the foreground dispatch system Receiving new intents at runtime Setting up the Java code - inheriting from Delphis native activity Building the Java code Setting up the deployment manager Points to note about Delphis deployment manager Setting up the native new intent method Building the app Notes on working around issues developing your app Working with NFC tag objects Reading an NFC tag Writing an NFC tag Conclusion Introduction Delphi Android apps can use Android APIs, both those already present in the RTL and others we can translate manually, in order to interact with parts of the Android system. This article will look at how we can make use of the NFC (Near Field Communications) API to access NFC tags in the same way as other Android NFC apps. Through this article you should gain an insight into the techniques involved in building NFC apps and working with native Android NFC APIs, some of which are reasonably straightforward to employ and some of which involve metaphoricaly rolling up ones sleeves and getting ones hands dirty. NFC tags have tag IDs so your app could just recognise an NFC tag and respond to it. However NFC tags can also have varying amounts of data written to them. This can include URLs, text or any other data. Your app can read this data and do things based upon what it finds. An app that supports NFC tags can operate, broadly speaking, in one of two ways: It can be installed and have Android understand that it can re