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I want to launch My Application when we taps on NFC tag even Phone is Locked same as did in Google Wallet Application.
I tried in following ways :
1) Tap NFC tag to launch my application after pressing Power button - Error :
05-23 22:00:22.949: D/NfcService(32443): EnableDisableDiscoveryTask: enable = false
05-23 22:00:22.964: D/NfcService(32443): NFC-C polling OFF
05-23 22:00:22.996: D/PhoneStatusBar(273): disable: < EXPAND icons alerts TICKER
system_info BACK* HOME* RECENT CLOCK* >
05-23 22:00:23.988: D/NfcService(32443): NFC-EE routing OFF
[10:33:22 AM IST]
2)Tap NFC tag after pressing Power button and now i am able to see Lock/Unlock screen - Error :
05-23 22:03:59.714: D/NfcService(32443): EnableDisableDiscoveryTask: enable = true
05-23 22:03:59.730: D/NfcService(32443): NFC-EE routing OFF
05-23 22:04:03.238: D/NfcService(32443): NFC-C polling ON
If i unlock the screen and Taps on NFC tag everything works fine
How to handle power button and lock/unlock screen in order to Launch my application when phone is Locked?
880
That is, without root access. NFCScreenOff by XDA Member lapwat is a Magisk Module that you can enable on your phone to always read NFC tags even when your screen is locked.
You can only make a limited number of locked transactions before your phone asks you to unlock it. You must also complete the transaction within a few minutes after you unlock it. Tip: For added security, set up your phone so that it must be unlocked to complete a near field communication (NFC) transaction.
If your device is locked, the Google Pay app can't be opened. If your device has a screen lock set up, it'll automatically become your app lock during setup. If your device doesn't have a screen lock set up, add one during setup.
Your phone's NFC chip (and Android Beam) needs to be activated before you can use NFC: Go to Settings > More. Tap on the NFC switch to activate it. The Android Beam function will also automatically turn on.
This is not supported. I don't think even Google Wallet works this way, are you sure about this? It is actually a security feature -- you don't want someone who stole your phone to be able to make payments with it without being able to unlock it.
69
According to Google, Android-powered devices must be unlocked in order to scan an NFC tag [1]. Also the Google Wallet concerns privacy and security, and works only in unlocked state [2].
[1] http://developer.android.com/guide/topics/connectivity/nfc/nfc.html
[2] http://www.google.com/wallet/faq.html
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