在 Android 中锁定屏幕时启动 NFC
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Launching NFC when screen is Locked in Android
提问by Venky
I want to launch My Application when we taps on NFC tag even Phone is Lockedsame as did in Google Wallet Application.
我想在我们点击 NFC 标签时启动我的应用程序，即使手机与谷歌钱包应用程序中的一样被锁定。
I tried in following ways :
我尝试了以下方法：
1) Tap NFC tag to launch my application after pressing Power button - Error:
1) 按下电源按钮后，点击 NFC 标签以启动我的应用程序 -错误：
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:
2）按下电源按钮后点击 NFC 标签，现在我可以看到锁定/解锁屏幕 -错误：
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
如果我解锁屏幕并点击 NFC 标签，一切正常
How to handle power button and lock/unlock screen in order to Launch my application when phone is Locked?
如何处理电源按钮和锁定/解锁屏幕以在手机锁定时启动我的应用程序？
采纳答案by Nikolay Elenkov
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.
这不受支持。我认为即使是 Google 电子钱包也不能这样工作，你确定吗？它实际上是一项安全功能——您不希望偷了您手机的人在无法解锁的情况下使用它付款。
回答by Nik NexAndrX
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].
根据谷歌的说法，Android 设备必须解锁才能扫描 NFC 标签 [1]。此外，谷歌钱包关注隐私和安全，并且只能在解锁状态下工作 [2]。
[1] http://developer.android.com/guide/topics/connectivity/nfc/nfc.html
[1] http://developer.android.com/guide/topics/connectivity/nfc/nfc.html
回答by D-C0d3r
I was looking to implement the same feature on one of my applications. After some search i discovered these links:
我希望在我的一个应用程序上实现相同的功能。经过一番搜索，我发现了这些链接：
http://www.xda-developers.com/android/use-nfc-with-screen-off-or-in-lock-screen-on-galaxy-nexus/
http://www.xda-developers.com/android/use-nfc-with-screen-off-or-in-lock-screen-on-galaxy-nexus/
Also note that the new Moto X was a feature called "Skip" that allow the same behaviour. You can see a demonstration on this video:
另请注意，新的 Moto X 是一项名为“跳过”的功能，它允许相同的行为。您可以在此视频中看到演示：
https://www.youtube.com/watch?v=-JUgspIGxcE
https://www.youtube.com/watch?v=-JUgspIGxcE
Hope it can help
希望它可以帮助
回答by Mohammed Azharuddin Shaikh
回答by Hollerweger
Probably it could work if you use:
如果您使用，它可能可以工作：
getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
