Design and Implementation of Android Contacts Synchronization System Based on the SyncML Protocol

Android is becoming more and more popular. Up to the first half of 2012, the Android phone market share has reached 52.5%. Only consider smart phone, the ratio is even more than 75%. Contacts is very important to users. Contacts synchronization system allows the user contacts can be stored on a network server. Users can process their data via multiple clients. And server can ensure consistency and security of users' data. Therefore, based on SyncML protocol we designed and implemented a contacts synchronization system for Android. Existing Android contacts sync software generally use separate synchronization protocol. They export all the contacts data into a file, and apply rsnyc algorithm to find the changes. In contrast, we provider a new way to find changes and use the SyncML to implemente the sync system.