自 2025 年 3 月 27 日起,我們建議您使用 android-latest-release
而非 aosp-main
建構及貢獻 AOSP。詳情請參閱「Android 開放原始碼計畫變更」。
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
nfc_tag_device 結構體參考資料
#include <
nfc_tag.h
>
初始化 NFC 標記。
駕駛人必須:
-
將靜態鎖定位元組設為唯讀
-
設定能力容器,停用寫入權限,例如:0xE1 0x10 <size> 0x0F
在任何
setContent()
呼叫之前,系統會先呼叫這個函式一次。
成功時傳回 0,錯誤時傳回 -errno。
定義位於檔案
nfc_tag.h
的
65
行。
int(* setContent)(const struct
nfc_tag_device
*dev, const uint8_t *data, size_t len)
|
設定 NFC 標記內容。
驅動程式必須在標記的資料區域中寫入 <data>,從區塊 4 的位元組 0 開始,並將資料區域的其餘部分設為零。
成功時傳回 0,錯誤時傳回 -errno。
定義位於檔案
nfc_tag.h
的
75
行。
這個結構體的說明文件是由下列檔案產生:
-
hardware/libhardware/include/hardware/
nfc_tag.h
這個頁面中的內容和程式碼範例均受《內容授權》中的授權所規範。Java 與 OpenJDK 是 Oracle 和/或其關係企業的商標或註冊商標。
上次更新時間:2025-07-27 (世界標準時間)。
[null,null,["上次更新時間:2025-07-27 (世界標準時間)。"],[],[],null,["# Android Hardware Abstraction Layer: nfc_tag_device Struct Reference\n\nnfc_tag_device Struct Reference\n===============================\n\n[Data Fields](#pub-attribs) \nnfc_tag_device Struct Reference \n\n`\n#include \u003c\n`[nfc_tag.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)`\n\u003e\n`\n\n|----------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Data Fields ----------- ||\n| struct [hw_device_t](/reference/hal/structhw__device__t) | [common](/reference/hal/structnfc__tag__device#a86a0ca82dd3f02023e259b8b5e155dbe) |\n| ||\n| int(\\* | [init](/reference/hal/structnfc__tag__device#ae5eddc2663eab28a5880c1c3ece3c2cd) )(const struct [nfc_tag_device](/reference/hal/structnfc__tag__device) \\*dev) |\n| ||\n| int(\\* | [setContent](/reference/hal/structnfc__tag__device#a33335a1531a79b11436d1272d2ec696b) )(const struct [nfc_tag_device](/reference/hal/structnfc__tag__device) \\*dev, const uint8_t \\*data, size_t len) |\n| ||\n| int(\\* | [getMemorySize](/reference/hal/structnfc__tag__device#a93d3375699112cf6216b01be934f26d1) )(const struct [nfc_tag_device](/reference/hal/structnfc__tag__device) \\*dev) |\n| ||\n\n\nDetailed Description\n--------------------\n\n\nDefinition at line\n[44](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\nof file\n[nfc_tag.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\n.\n\nField Documentation\n-------------------\n\n\n|-----------------------------------------------------------------|\n| struct [hw_device_t](/reference/hal/structhw__device__t) common |\n\n\nCommon methods of the NFC tag device. This\n*must*\nbe the first member of nfc_tag_device_t as users of this structure will cast a\n[hw_device_t](/reference/hal/structhw__device__t)\nto nfc_tag_device_t pointer in contexts where it's known the\n[hw_device_t](/reference/hal/structhw__device__t)\nreferences a nfc_tag_device_t.\n\n\nDefinition at line\n[51](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\nof file\n[nfc_tag.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\n.\n\n|---------------------------------------------------------------------------------------------------|\n| int(\\* getMemorySize)(const struct [nfc_tag_device](/reference/hal/structnfc__tag__device) \\*dev) |\n\n\nReturns the memory size of the data area.\n\n\nDefinition at line\n[80](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\nof file\n[nfc_tag.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\n.\n\n|------------------------------------------------------------------------------------------|\n| int(\\* init)(const struct [nfc_tag_device](/reference/hal/structnfc__tag__device) \\*dev) |\n\n\nInitialize the NFC tag.\n\n\nThe driver must:\n\n- Set the static lock bytes to read only\n- Configure the Capability Container to disable write acess eg: 0xE1 0x10 \\\u003csize\\\u003e 0x0F\n\n\nThis function is called once before any calls to\n[setContent()](/reference/hal/structnfc__tag__device#a33335a1531a79b11436d1272d2ec696b)\n.\n\n\nReturn 0 on success or -errno on error.\n\n\nDefinition at line\n[65](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\nof file\n[nfc_tag.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\n.\n\n|----------------------------------------------------------------------------------------------------------------------------------|\n| int(\\* setContent)(const struct [nfc_tag_device](/reference/hal/structnfc__tag__device) \\*dev, const uint8_t \\*data, size_t len) |\n\n\nSet the NFC tag content.\n\n\nThe driver must write \\\u003cdata\\\u003e in the data area of the tag starting at byte 0 of block 4 and zero the rest of the data area.\n\n\nReturns 0 on success or -errno on error.\n\n\nDefinition at line\n[75](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\nof file\n[nfc_tag.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)\n.\n\n*** ** * ** ***\n\nThe documentation for this struct was generated from the following file:\n\n- hardware/libhardware/include/hardware/ [nfc_tag.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/nfc_tag.h)"]]