| 通过Link-OS SDK开发,连接USB驱动时,反应时间超过30秒,如何解?   Link-OS SDK中提供了一个DEMO,使用"ZebraPrinter printer = ZebraPrinterFactory.getInstance(printerConnection)"来从驱动中获取连接,但该方法速度比较慢,目前提供了"com.zebra.sdk.comm.DriverPrinterConnection"来替代"ZebraPrinterFactory.getInstance"方法,例子如下:   private void sendAndWaitDate() {Connection conn = null;
 try {
 conn = new DriverPrinterConnection("ZDesigner ZT410-300dpi ZPL");
 conn.open();
 byte[] zpl = "^XA^FN1^RFR,H,0,12,2^FS^FH_^HV1,256^FS^RFW,H,1,14,1^FD3000313233343536373839414243^FS^XZ".getBytes();
 byte[] tid = null;
 tid = conn.sendAndWaitForResponse(zpl, 500, 500, null);
 DemoDialog.showErrorDialog(SendFileDemo.this, tid.toString(), tid.toString());
 } catch (ConnectionException e) {
 DemoDialog.showErrorDialog(SendFileDemo.this, e.getMessage(), "Connection Error!");
 } finally {
 try {
 if (conn != null)
 conn.close();
 } catch (ConnectionException e) {
 }
 }
 }
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