how to hide photos from gallery and store it in my app

Question

I am developing an android application where it will select some photos from the gallery and hide them,

i am able to select particular picture from gallery and store it in my app and delete it from gallery,but a person can see those pictures if he opens my app folder in sdcard ,so how do i store them such that even if a person checks my sdcard then he should not be able to detect those pictures ?

Answer 1

If you want to prevent Gallery from showing images from your app's folder, you can put a file named .nomedia in that folder.

Source: https://stackoverflow.com/a/6713863/450534

If you want to hide the folder from apperaring in say, a File Manager, then ensure your folder starts with a period (.). For example, if the folder is called myfolder, it should be created as .myfolder

Source: https://stackoverflow.com/a/5878270/450534

Please note, that a user can change the settings of the File Manager to show hidden files and folder. For that, there is no solution.

Answer 2

The only secure way to do this is to encrypt the image data yourself and remove the original files, leaving only your application able to decrypt the files.

Take a look at How to encrypt file from SD card using AES in Android? to see how this can be done.

As an additional step, you can also use any number of the other answers to hide the encrypted files