Android: most optimal way to save progress

Question

My app lets users browse through slideshows of images. Every slideshow is a collection of all the images in a certain folder. Usually a folder has about 50-60 images. I want to save the image position in the slideshow the user is at when he/she exits that folder's slideshow. What would be the most optimal way for this?

I think this post should provide a good minimal working example: http://stackoverflow.com/questions/151777/saving-activity-state-in-android — D4ngle, Jun 10 '14 at 19:21

score 0 · Answer 1 · answered Jun 10 '14 at 19:17

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You can save this persistently (across application launches by using a shared preferences).

answered Jun 10 '14 at 19:17

Andre Perkins

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score 0 · Answer 2 · answered Jun 10 '14 at 19:20

You can use Gson to convert your class (which has your save data) into a json string and can use SharedPreferances to serialize the string into a file. When you want to laod your progress, you can read the SharedPreference value and load your class using Gson.

Android: most optimal way to save progress

2 Answers2