Android实现内存中数据保存到sdcard的方法

public static void writeToSdCard(String s) {    try {      File dst = new File("/sdcard/test_sensor/" + mName + ".txt");      File parent = dst.getParentFile();      if(!parent.exists()) {        parent.mkdirs();      }      FileOutputStream outStream = new FileOutputStream(dst, true);      OutputStreamWriter writer = new OutputStreamWriter(outStream, "gb2312");      writer.write(s);      writer.write("/n");      writer.flush();      writer.close();// 记得关闭      outStream.close();    } catch (Exception e) {      Log.i("test result", "file write error");      e.printStackTrace();    }}