android 向内部存储写文件

String  path = Environment.getExternalStorageDirectory().getPath();
String name = path+"//"+"20131109.txt";
File file = new File(name);
String content="just a test";
 
try {
FileOutputStream outStream =new FileOutputStream(file);  
outStream.write(content.getBytes());
outStream.close();  
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}