How to hide a folder in sdcard in android

Question

I am developing an android application, It create some folders at starting of the application, which have images, video files and subfolder, i want to hide these folders and

Answer 1

This "." dot method doesn't have any security. Because you cann't use any password to unlock it. Any user can show hidden files and unlock it by removing "." symbol. For this reason you may use free file hide apps to protect you privacy.