How to Understand Java API for Contactless Mifare Cards: Difference between revisions
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// demo for sector 1, block 2 | // demo for sector 1, block 2 |
Revision as of 01:39, 27 April 2021
- Get RFCardReaderDevice
device = (RFCardReaderDevice) POSTerminal.getInstance(mContext).getDevice(POSTerminal.DEVICE_NAME_RF_CARD_READER);
- Open device
device.open();
- Search Card
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.
- Read
// 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();
}
}
- Write
// 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();
}
}
- Close device
device.close();