简单的读写操作

public void writeFileData(String filename, String message) { FileOutputStream fs = null; try { fs = openFileOutput(filename, MODE_PRIVATE); byte[] msg = message.getBytes(); fs.write(msg); } catch(FileNotFoundException e) { e.printStackTrace(); } catch(IOException ioe) { } finally { if(fs != null) { try { fs.close(); } catch (IOException e) { e.printStackTrace(); } } } } public String readFileData(String filename) { FileInputStream fis = null; String result = null; try { fis = openFileInput(filename); int len = fis.available(); byte[] msg = new byte[len]; fis.read(msg); result = EncodingUtils.getString(msg, ENCODING); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if(fis != null) { try { fis.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; }