Asift c++ implementation very efficient

1.支持4串口同时收发，有定时自动发送功能，收发模式可选Txt或Hex模式； 2.为减轻界面卡顿的情况，接收区的刷新采用单独的线程进行定时刷新； 3.发送区的数据以及一些设置项，在程序关闭时会自动保存，打开时自动载入； 4.jni使用最新的NDKr8b重新编译了一下(1., support 4 serial ports at the same time, send and receive regularly, automatic sending function, sending and rec

Android JNI开发，引用第三方库curl进行上传和下载(The development of Android JNI refers to the uploading and downloading of the third party library curl.)

详细记录了linux系统和windows系统中动态链接库的生成过程。并且通过JNI调用所生成的动态链接库。(The generation of dynamic link libraries in Linux and Windows systems is documented in detail. And the generated dynamic link library is used by JNI.)