如何检测 NFC 标签被移除 [英] How to detect NFC tag was removed

问题描述

我是 NFC 技术的新手.我正在尝试读写 Mifare Classic 4K 标签.我成功地阅读和写作.我可以检测到 onNewIntent 动作上的标签.

I am new at NFC technology. I am trying to read and write Mifare Classic 4K tags. I succeeded reading and writing. I can detect the tag on onNewIntent action.

我的问题是我无法检测到何时移除了 NFC 标签(类似于检测标签时的 onNewIntent).

My problem is that I could't detect when an NFC tag was removed (similar to onNewIntent when detecting a tag).

我该如何解决这个问题?

How can I solve this problem?

推荐答案

可以通过调用查看isoDep.isConnected();在 IsoDep 中

You can check by calling isoDep.isConnected(); in IsoDep

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