Hi, I am developing an application where I basically download a video file and show it in the 

HistoryActivity

. My video model has 

name

, 

authorName

, 

authorImageUrl

, 

videoDescription

 and every time I download a video, I store the video info in the 

SharedPreference

 so that I can list all the videos with their description in the 

HistoryActivity

. I am using video’s 

name

 property as an ID to connect the video with its description I stored in the 

SharedPreference

. However, when user changes the name of the video using other apps, I am losing the ID. So the question: Is there any way that I can use as an ID for video file or any other file type?

without getting too far into the question of what you want to consider, "identity" for a video, it sounds like you're defining video identity to be an entry in your downloaded files record. You want the metadata to be able to change without affecting the identity, though the bytes on disk and the filename of the bytes on disk are probably not going to change. If the user deletes a file and redownloads it, that's a "new" video, from your description.

Hmm, good point, I see it now 🙂 thanks.