NFC on Android

NickV

Does the nfc plugin for android works?
I've tried by using the c++ and the qml but nothing worked.

NickV

I found this:

Note: On Android, Qt Nfc only works in foreground applications. Android services are not supported which is due to API limitations on the Android side.

Does this mean that i can not write a program in qt to read nfc tags from android?

SGaist

Hi,

No, it means that your application must be the current active one in order to get something from the NFC reader.

NickV

I run the examples into my android device (samsung galaxy s2 plus) but it returns that "NFC not available". Why is that?

NickV

An example of my code is:

m_manager = new QNearFieldManager(this);
if (!m_manager->isAvailable()) {
qWarning() << "NFC not available";
return;
}

QNdefFilter filter;
filter.setOrderMatch(false);
connect(m_manager, SIGNAL(targetDetected(QNearFieldTarget*)),
        this, SLOT(targetDetected(QNearFieldTarget*)));
connect(m_manager, SIGNAL(targetLost(QNearFieldTarget*)),
        this, SLOT(targetLost(QNearFieldTarget*)));

I also write this into manifest in order to be the current one:

<intent-filter>
<action android:name="android.nfc.action.NDEF_DISCOVERED"/>
<category android:name="android.intent.category.DEFAULT"/>
<data android:mimeType="text/plain"/>
</intent-filter>

SGaist

Did you try to run one of Qt's NFC examples ?

bnogal

What example i can use to run it in Android?
The only one is to read, that is QML CorkBoard example, and it can only read android:mimeType="text/plain"

And i think the example to write records, NFCeditor, can only generate text records not encoded as mime.

So if i modify that examples to make them "run", i will end up having the same as in my application that is not working.

In the other hand, i found out a problem in my code, mime must be lowercase. If this can help somebody

bnogal

I write because my thread with same topic...
https://forum.qt.io/topic/80451/nfc-android