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Near Field Communication (NFC) from Android Developers explains (emphasis added and edited for clarity) Near Field Communication (NFC) is a set of short-range wireless technologies, typically requiring a distance of 4cm or less to initiate a connection. NFC allows you to share small payloads of data between an NFC tag and an Android-powered device, or ...


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There are 3 NFC modes. Taken directly from official Android Developer - Near Field Communication, Android-powered devices with NFC simultaneously support three main modes of operation: Reader/writer mode, allowing the NFC device to read and/or write passive NFC tags and stickers. P2P mode, allowing the NFC device to exchange data with other ...


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The Tag Dispatch System of Android Developers says Android-powered devices are usually looking for NFC tags when the screen is unlocked, unless NFC is disabled in the device's Settings menu. When an Android-powered device discovers an NFC tag, the desired behavior is to have the most appropriate activity handle the intent without asking the user what ...



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