在Android中实现文件读写
android 实现下载文件

private String getTextString(String pathandname) throws IOException{String str="";FileInputStream fis = new FileInputStream(pathandname);//InputStreamReader isr=new InputStreamReader(fis, "gbk");//BufferedReader br=new BufferedReader(isr);int size=fis.available();byte[] buffer=new byte[size];fis.read(buffer);fis.close();   str = new String(buffer,"GBK");//支持双字节字符myApp.setCharNumofString(str.length());//存储总字符数return  str;}

读取assets文件夹下的txt文件
http://gundumw100.iteye.com/blog/850611