Project done as Autoentrepreneur at Doreapp
Phone History is an Android application retrieving the usage history of the phone. It gets the phone usage from Android system and displays it in a list starting with the most recent usage. It also explores the phone storage to display file modiciations, such as the pictures taken or the files downloaded. Finally, it display statistics about the phone usage during the last 24 hours. This includes the Top 10 user applications in terms of usage, and the associated duration as well as a chronological graph of the phone usage per hour.
Technically, the app uses UsageEvents API to recover the apps' usage. An algorithm is dedicated to read data from this API, which only returns events.
Android system only keeps record of the phone usage during few days, so the app is unable of showing any older app usage. Therefore, PhoneHistory stores the app usage in an internal SQL database.
This application is - when I am writing this - my most popular app on the Google Play Store.