在Android应用程序中实现与智能卡的通信时,可以使用Android提供的USB Host功能。这种方法可以实现通过USB接口与智能卡之间的通信。以下是一个可能的实现示例:
- 在AndroidManifest.xml文件中添加以下权限:
<uses-feature android:name=“android.hardware.usb.host” />
<uses-permission android:name=“android.permission.USB_PERMISSION” />
- 在Activity中添加以下代码:
private void readCIN() {
UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
UsbDevice device = null;
for (UsbDevice usbDevice : manager.getDeviceList().values()) {
if (usbDevice.getProductId() == PRODUCT_ID && usbDevice.getVendorId() == VENDOR_ID) {
device = usbDevice;
break;
}
}
if (device != null) {
PendingIntent permissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
registerReceiver(usbReceiver, filter);
manager.requestPermission(device, permissionIntent);
}
}
private final BroadcastReceiver usbReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ACTION_USB_PERMISSION.equals(action)) {
synchronized (this) {
UsbDevice device = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
UsbInterface usbInterface = device.getInterface(0);
UsbEndpoint usbEndpoint = usbInterface.getEndpoint(0);
UsbDeviceConnection connection = manager.openDevice(device);
connection.claimInterface(usbInterface, true);
byte[] buffer = new byte[256];
int length = connection.bulkTransfer(usbEndpoint, buffer, buffer.length, 1000);
if (length > 0) {
// 处理智能卡返回的数据
}
} else {
// 权限请求被拒绝
}
}
}
}
};
- 从智能卡中读取CIN数据:
// 在onReceive方法中添加智能卡通信代码
// 发送APDU命令到智能卡
byte[] command = { 0x00,0xA4,0x04,0x00,0x08,AID,0x01,0x02,0x03,0x