Android端串口程序
需要在app下面的build.gradle里面设置compileSdkVersion为运行目标机器的当前平台，否则jni库运行会出错。 注：AS编译jni需要版本1.3或以上
Serial Port API sample v1.1 This program is the sample application provided with project android-serialport-api. More information and bug report on [http://code.google.com/p/android-serialport-api] Copyright 2010-2011 Cedric Priscal.
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