可以在Android中创建受密码保护的文件夹吗？

Question

Can I create password protected folder in Android?

 File nf = new File("Folder");
    nf.mkDire();

Answer 1

First, new File("Folder") has no meaning in Android. Always use some method to get at a root location, whether that is for internal storage or external storage .

Second, you cannot create a password-protected folder in Android at the OS level. You are welcome to store files in internal storage, in which case they are only accessible via your app, which can require a password (exception: people who root their devices can get at the files directly).