android EACCES 错误

Question

java.io.FileNotFoundException: /mnt/sdcard/ttt.tt: open failed: EACCES (Permission denied)
android小白，出错如上，已经申请了

2个权限，写文件到SD卡报这个错误，请问大牛们这是怎么回事？

部分代码：
File file = new File(Environment.getExternalStorageDirectory(), filename);
Log.i("FILE", Environment.getExternalStorageDirectory().getAbsolutePath());
FileOutputStream outStream = new FileOutputStream(file);
outStream.write(content.getBytes());
outStream.close();

Answer 1

可参考以下链接

http://blog.csdn.net/twlkyao/article/details/17595291