1 / 11

Location Based Time Capsule on Android

Location Based Time Capsule on Android. Meng Cheng Qin Huang Yiteng Zhang Zhong Ren. Overview. “Sensing data without knowing the location is meaningless.” User can save a message inside a “capsule” and bind it to a certain time and/or location

nusa
Download Presentation

Location Based Time Capsule on Android

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Location Based Time Capsule on Android Meng Cheng Qin Huang Yiteng Zhang Zhong Ren

  2. Overview • “Sensing data without knowing the location is meaningless.” • User can save a message inside a “capsule” and bind it to a certain time and/or location • Leave the “capsule” for him/herself or for other users • Potential use cases: • Birthday/anniversary greetings • Location-based reminders • Leave a note for whoever comes to Yale • Send a message to the future self

  3. Client • Easy, smooth navigation using Fragments • Send capsule to other users from the contact list • User can directly select any location on the map • Conveniently select any date/time on the calendar

  4. Server • MySQL + JDBC • HTTP + JSON • http://<server>/contacts?user_id=<userid> • {"contacts":[{"id":1,"name":"zr36"},{"id":2,"name":"yry3"}]} • DB connection pool to support concurrent access • Commit / rollback to ensure data integrity • Optimized search on location

  5. GCM Service • Each device has a unique key for GCM • The key registered both on GCM and Server • Push time/location capsule to user’s device • Instantaneous and Energy-efficient

  6. What is novel? • Users can define a “capsule” in three dimensions: • Time • Location • User visibility • Server can instantaneously push matched capsule via GCM to the corresponding users

  7. What is substantial? • Client adaptively updates its location • Adjust update interval according to the search result on the server and the location change of the device • Extend battery life time • Server adaptively searches for location capsules • Search inside a latitude/longitude-bounded square centered at the client’s location • If no match found, enlarge the search square and reduce the update rate of the device

  8. Future Improvements • More furnished UI • More efficient server setup e.g. MongoDB • Enable capsules to store pictures or audio • Use Amazon S3 to separate persistent storage from application server • Integration with Facebook / Google+

  9. Demo

  10. Thanks for your attention!

More Related