if(
			    	Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){   //sdcard装载了的话"
			         //File file = new File(Environment.getExternalStorageDirectory(),filename);  
			         FileOutputStream outStream = new FileOutputStream(Environment.getExternalStorageDirectory()+name+".txt",true);   
	                 OutputStreamWriter writer = new OutputStreamWriter(outStream,"gb2312");  
	                 writer.write(s);   
	                 writer.write("/n");  
	                 writer.flush();  
	                 writer.close();//记得关闭
  	                 outStream.close();  
		        }

在用Environment的时候报错：

这个怎么办？