public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        try{             write("prothro.sq","welcome to the hell");             String str = read("prothro.sq");             Log.v("sq", str);                     }catch(IOException e){e.printStackTrace();}           }                    String read(String fileName) throws IOException    {        FileInputStream fis = this.openFileInput(fileName);        // openFileInput(String FileName) 是android 取得 FileInputStream 的方法        StringBuilder sb = new StringBuilder();        //相当于 StringBuffered                byte[] buff = new byte[1024];    //存放数据的字节数组        int hasRed = 0;                                        //像java 那样读取文件内容        while((hasRed = fis.read(buff))>0)        {            sb.append(new String(buff,0,hasRed));        }        return sb.toString();    }                        void write(String fileName,String content) throws IOException    {        FileOutputStream fos = this.openFileOutput(fileName, MODE_APPEND);        PrintStream ps = new PrintStream(fos); //将 FileOutputStream 包装成 打印流        ps.println(content);    //打印到文件中去        ps.close();    }