Pilhas NFC no sistema operacional Android

Question

Alguém pode me ajudar a entender o estado atual da pilha do Android NFC? Com o o OS 2.3 houve um pequeno suporte NFC (limitado apenas apenas à leitura de tags nxp), posteriormente o google aumentam a API, portanto, em OS 2.3.3 o intervalo mais amplo de As tags são suportadas e também P2P é possível.

Minha pergunta é como o aberto nfc stack ( http://www.open -nfc.org/ ) se encaixa no estado atual?

Como eu entendo que a pilha NFC aberta é a atividade paralela e é a substituição opcional para a pilha atual. Devido à sua descrição, supera alguns limites da implementação da pilha do Google NFC e faz novas adapções HW (i.E. Suporte para novos tipos de tags) mais fáceis ...

Para o meu entendimento esta pilha é destinada por fabricantes de dispositivos, não desenvolvedores móveis - é isso mesmo? Ou é possível baixar a pilha NFC aberta, compilá-la como uma biblioteca, colocar em .apk e usar como alternativa a Google Stack?

Mas mesmo assim será possível que os desenvolvedores de aplicativos usem a pilha NFC Abrir - faz sentido com os novos recursos 2.3.3 OS?

Answer 1

Can someone help me understanding the current state of the NFC Android stack? With the OS 2.3 there was released small NFC support (limited only to NXP tags reading), later the Google augment the API, so in OS 2.3.3 the wider range of tags is supported and also p2p is possible.

My question is how the Open NFC stack (http://www.open-nfc.org/) fits into current state??

At the moment (Android 2.3.4), the Android platform does not integrate the Open NFC stack. This stack has several advantages: not limited to one particular NFC hardware, portable to many different environments (not only Android), many additional features compared to the current stack. On the other hand, because Open NFC is not part of the standard Android environment, it requires some work (but it is actually quite easy) to use this stack in an Android platform. The Open NFC documentation describes this process.

As I understand the Open NFC stack is parallel activity and is optional replacement to the current stack. Due to its description it overcomes some limits of the Google NFC stack implementation and makes new HW adaptions (i.e. support for new tag types) easier…

Correct.

To my understanding this stack is intended to by used by device manufacturers, not mobile developers – is that right? Or is it possible to download the Open NFC stack, compile it as a library, put into .apk and use as an alternative the Google stack?

Unfortunately, because the standard Android kernel does not support modules loading, the Open NFC stack cannot be simply installed as another application, it requires a kernel change. But once the kernel is replaced, it is quite easy to deploy and use the Open NFC stack.

But even it will be possible for application developers to use the Open NFC stack – does it make sense with the new 2.3.3 OS features?

An application developer should probably stick to the OS features, even if more limited, since they assure the portability of the code over any NFC-enabled phone. But if you are trying to use "more" features than what comes with Android, Open NFC is a good candidate.

Hope this helps...

Answer 2

To my understanding this stack is intended to by used by device manufacturers, not mobile developers – is that right?

According to the Open NFC site, yes.