how to retrieve the printer response from the Bluetooth printer in android by using X-On and X-Off. I have tried but It is not working. I have tried with the following code but it is not working:
SerialPort sPort = (S
我正在制作简单的应用程序,这是基于手机的位置。我正在使用定位。在main()函数中,我请求GPS位置,然后使用它。(我正在计算日出和日落)所以,我的问题是:我如何才能获得一个“新鲜”的位置?我可以从另一个类调用MainActivity刷新吗?private final Context mContext;
public void onLocationChanged(Locat