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| == Overview ==
| | {{Migrating|https://smartpossdk.gitbook.io/cloudpossdk/faq/card/use-felica-card}} |
| This section outlines the procedure for using Java API to interact with Felica cards, which differ from standard contactless CPU cards.
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| == Steps for Java API Usage with Felica Cards ==
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| * '''Get RFCardReaderDevice:'''
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| Initialize by obtaining an instance of the RFCardReaderDevice. This is the first step in establishing communication with the Felica card reader.
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| <syntaxhighlight lang="java" line='line'>
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| device = (RFCardReaderDevice) POSTerminal.getInstance(mContext).getDevice(POSTerminal.DEVICE_NAME_RF_CARD_READER);
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| </syntaxhighlight>
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| * '''Open Device:'''
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| Execute the command to open the card reader device. This action establishes a connection between your Java application and the card reader.
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| <syntaxhighlight lang="java" line='line'>
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| device.open();
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| </syntaxhighlight>
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| * '''Search for Card:'''
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| Conduct a search operation to detect the Felica card within the reader's range.
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| <syntaxhighlight lang="java" line='line'>
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| OperationListener listener = new OperationListener() {
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| @Override
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| public void handleResult(OperationResult arg0) {
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| if (arg0.getResultCode() == OperationResult.SUCCESS) {
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| sendSuccessLog2(mContext.getString(R.string.find_card_succeed));
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| rfCard = ((RFCardReaderOperationResult) arg0).getCard();
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| } else {
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| sendFailedLog2(mContext.getString(R.string.find_card_failed));
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| }
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| }
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| };
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| device.listenForCardPresent(listener, TimeConstants.FOREVER); The result will be returned in the callback listener.
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| </syntaxhighlight>
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| * '''Communicate with the Card:'''
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| Once the Felica card is identified, proceed to communicate with it.
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| <syntaxhighlight lang="java" line='line'>
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| if (rfCard instanceof FelicaCard) {
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| result = ((FelicaCard) rfCard).transmit(arryAPDU, 0);
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| }
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| </syntaxhighlight>
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| * '''Note on APDU Commands for Felica Cards:'''
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| ** Felica cards use a unique APDU command structure. Typically, this includes N (2 bytes in little-endian format), CmdID (1 byte), followed by data.
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| ** Refer to the specific customer specifications for detailed information regarding the APDU commands for Felica cards.
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| * '''Close Device:'''
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| Conclude the session by closing the device. This step is essential for security and proper device management.
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| <syntaxhighlight lang="java" line='line'>
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| device.close();
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| </syntaxhighlight>
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| == Important Considerations ==
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| * The communication process with Felica cards requires adherence to their specific APDU command structure.
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| * Developers should consult detailed customer specifications for precise command formats and data handling.
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