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https://developer.android.com/reference/android/nfc/tech/NdefFormatable?authuser=1 NdefFormatable | API reference | Android Developers api reference android developers https://developer.android.google.cn/reference/android/nfc/tech/NdefFormatable NdefFormatable | API reference | Android Developers api reference android developers https://developer.android.com/reference/android/nfc/tech/NdefFormatable?authuser=5 NdefFormatable | API reference | Android Developers api reference android developers