|
|
| (One intermediate revision by one other user not shown) |
| Line 1: |
Line 1: |
| == Overview ==
| | {{Migrating|https://smartpossdk.gitbook.io/cloudpossdk/faq/card/use-mifare-card}} |
| This section provides a step-by-step guide on using Java API for operations involving contactless Mifare cards.
| |
| == Steps for Java API Usage ==
| |
| * '''Get RFCardReaderDevice:'''
| |
| Initiate the process by retrieving an instance of the RFCardReaderDevice. This is crucial for establishing communication with the Mifare card reader.
| |
| <syntaxhighlight lang="java" line='line'>
| |
| device = (RFCardReaderDevice) POSTerminal.getInstance(mContext).getDevice(POSTerminal.DEVICE_NAME_RF_CARD_READER);
| |
| </syntaxhighlight>
| |
| * '''Open Device:'''
| |
| Execute the command to open the card reader device. This step establishes a connection between your Java application and the card reader
| |
| <syntaxhighlight lang="java" line='line'>
| |
| device.open();
| |
| </syntaxhighlight>
| |
| * '''Search for Card:'''
| |
| Start a search operation to detect the contactless Mifare card within the reader's range.
| |
| <syntaxhighlight lang="java" line='line'>
| |
| OperationListener listener = new OperationListener() {
| |
| @Override
| |
| public void handleResult(OperationResult arg0) {
| |
| if (arg0.getResultCode() == OperationResult.SUCCESS) {
| |
| sendSuccessLog2(mContext.getString(R.string.find_card_succeed));
| |
| rfCard = ((RFCardReaderOperationResult) arg0).getCard();
| |
| } else {
| |
| sendFailedLog2(mContext.getString(R.string.find_card_failed));
| |
| }
| |
| }
| |
| };
| |
| device.listenForCardPresent(listener, TimeConstants.FOREVER); The result will be returned in the callback listener.
| |
| </syntaxhighlight>
| |
| * '''Read from Card:'''
| |
| Once the card is detected, execute read operations as required. This may involve accessing data stored on the card.
| |
| <syntaxhighlight lang="java" line='line'>
| |
| // demo for sector 1, block 2
| |
| int sectorIndex=1;
| |
| int blockIndex =2;
| |
| if (rfCard instanceof MifareCard) {
| |
| byte[] key = new byte[]{
| |
| (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
| |
| (byte) 0xFF
| |
| };
| |
| try {
| |
| MifareCard card = ((MifareCard) rfCard);
| |
| boolean verifyResult = card.verifyKeyA(sectorIndex, key);
| |
| if(verifyResult){
| |
| byte[] result = card.readBlock(sectorIndex, blockIndex);
| |
| }
| |
| } catch (DeviceException e) {
| |
| e.printStackTrace();
| |
| }
| |
| }
| |
| </syntaxhighlight>
| |
| * '''Write to Card:'''
| |
| Perform write operations to modify or add data to the Mifare card, as per your application’s needs.
| |
| <syntaxhighlight lang="java" line='line'>
| |
| // demo for sector 1, block 2
| |
| int sectorIndex=1;
| |
| int blockIndex =2;
| |
| if (rfCard instanceof MifareCard) {
| |
| byte[] key = new byte[]{
| |
| (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
| |
| (byte) 0xFF
| |
| };
| |
| try {
| |
| MifareCard card = ((MifareCard) rfCard);
| |
| boolean verifyResult = card.verifyKeyB(sectorIndex, key);
| |
| if(verifyResult ){
| |
| card.writeBlock(sectorIndex, blockIndex, arryData);
| |
| }
| |
| } catch (DeviceException e) {
| |
| e.printStackTrace();
| |
| }
| |
| }
| |
| </syntaxhighlight>
| |
| * '''Close Device:'''
| |
| After completing the read/write operations, close the device to end the communication session. This is important for maintaining the security and integrity of both the card and the reader.
| |
| <syntaxhighlight lang="java" line='line'>
| |
| device.close();
| |
| </syntaxhighlight>
| |
| == Important Notes ==
| |
| * Follow the steps sequentially to ensure successful interaction with contactless Mifare cards.
| |
| * Handle exceptions and errors appropriately for smooth and secure application functionality.
| |
