// 返回打印机状态
public static String getStatus(short vendorId, short productId) {
String status;
Device dev = USB.getDevice(vendorId, productId);
try {
if (dev != null && !dev.isOpen()) {
dev.open(1, 0, -1);
}
byte[] data = new byte[] {0x0D};
int timeout = 2000;
dev.writeBulk(0x2, data, data.length, timeout, false);
status = Const.print_online;
} catch (USBException e) {
e.printStackTrace();
String errMsg = e.getMessage();
if (errMsg.contains("timeout error")) {
status = Const.print_papaer_out;
} else if (errMsg.contains("not found on USB")) {
status = Const.print_offline;
} else {
status = Const.print_offline;
}
if (dev != null) {
try {
dev.reset();
} catch (USBException e1) {
e1.printStackTrace();
}
}
}
return status;
}
// 打印字节数组
public static String print(short vendorId, short productId, byte[] data) {
String result = PrintMsg.status_print_no;
Device dev = USB.getDevice(vendorId, productId);
try {
if (dev != null && !dev.isOpen()) {
dev.open(1, 0, -1);
}
int timeout = 2000;
dev.writeBulk(0x2, data, data.length, timeout, false);
result = PrintMsg.status_print_yes;
} catch (USBException e) {
result = PrintMsg.status_print_err;
e.printStackTrace();
if (dev != null) {
try {
dev.reset();
} catch (USBException e1) {
e1.printStackTrace();
}
}
}
return result;
}