android读取sdcard路径下的文件的方法

// 读取sdcard文件private void sdcardRead(){String fileName = "/sdcard/my_sdcard.txt";// assets下文件//String fileName = "/sdcard/test/my_sdcard_test.txt";// sdcard下子目录文件String ret = "";try {FileInputStream fis = new FileInputStream(fileName);int len = fis.available();byte []buffer = new byte[len];

fis.read(buffer);ret = EncodingUtils.getString(buffer, "UTF-8");fis.close();} catch (Exception e) {e.printStackTrace();}tvTXT.setText(ret);}