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

基本导出方法： CREATE OR REPLACE DIRECTORY test_dir(directory别名) AS /u01/app/oracle/oradata/ (此处为硬盘上路径) GRANT READ, WRITE ON DIRECTORY test_dir(directory别名) TO scott(指定用户名)/public(所有用户) expdp scott/scott@orcl directory=test_ DUMPFILE=xx.dmp schem