自己根据android发送短信的log信息整理的短信PDU编码规则解析及参考资料。-Accordance with their own android SMS log information collated SMS PDU encoding rules analysis and reference materials.

android 写日志文件的方法，比较方便的读取文件，查找问题-Android to write the log file method, more convenient to read the file, find the problem