Android Caching Data
Android app can store data to cache when your smartphone is online. App will display the data from internet when you online but when you offline or no internet connection on your smartphone the last data will be displayed in the app from the cache.
http://www.wingnity.com/blog/android-json-parsing-and-image-loading-tutorial/
http://microblogging.wingnity.com/JSONParsingTutorial/jsonActors
You can try with internet connection on your smartphone, title on actionbar will display "Data From Server"
If you haven't internet connection or in offline mode, title on actionbar will be "Data From Cache"
If you clear cache before open the app and your smartphone in offline mode, the title will be "No Cache" because you haven't no internet connection and no cache in your memory