【string编码格式】Android读取txt文件乱码问题

很多Android开发者在读取含有双字节字符的txt文件的时候，可能会中文乱码问题，解决办法如下：

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;

}

下面附带一个检测txt文件中是否含有双字节字符的方法，主要功能：检测txt文件中是否含有双字节字符，若有返回假，否则返回真。

public static boolean isRightfulTXT(File f) {

 

     String regexp = "[^\\x00-\\xff]" ; //双字节字符

     Pattern p = Pattern.compile(regexp);

     

     try {

         FileInputStream fis = new FileInputStream(f);

         //"GBK"编码方式支持双字节字符

         InputStreamReader isr = new InputStreamReader(fis, "GBK" );

         BufferedReader br = new BufferedReader(isr);

         String line = "" ;

         while ((line = br.readLine()) != null ){

             //循环读取文件每一行，检测是否含有双字节字符

             Matcher m = p.matcher(line);

             if (m.find()) {

                 fis.close();

                 isr.close();

                 br.close();

                 return false ;  

             }    

         }

         fis.close();

         isr.close();

         br.close();  

     }

     catch (FileNotFoundException e) {

         e.printStackTrace();  

     }

     catch (UnsupportedEncodingException e) {

         e.printStackTrace();  

     }

     catch (IOException e) {

         e.printStackTrace();  

     }

     

     return true ;

}