问题
I need to Synchronize some tables between the App SQLite Database an a MS SQL Database hosted online.
I already have a COLUMN (IsSync) on each table that allows me to know which ROWS are pending sync (i.e. SELECT * FROM Locations WHERE IsSync=0)
The Locations table is one of the tables that I need to synchronize as soon as the table got updated/inserted. This table contains GPS Location data (Lat,Lng,Accuracy,Speed, etc) that is inserted EACH AND EVERY 3-4 SECONDS (15 records each minute).
Since I need to keep checking every N (2,3,4,etc) SECONDS how many rows need to be SYNC... what should I use inside my Activity... a TIMER, a SERVICE, a ???
IMPORTANT
I want to have the process of INSERTING data on this table APART of the process that CHECKS how many rows must be UPDATED (via JSON to HOST)
The process must be Asynchronous inside my Activity in order to not interfere with any other task/thread running inside the Activity.
回答1:
Take a look at SyncAdapter:
https://developer.android.com/training/sync-adapters/index.html
Synchronizing data between an Android device and web servers can make your application significantly more useful and compelling for your users. For example, transferring data to a web server makes a useful backup, and transferring data from a server makes it available to the user even when the device is offline. In some cases, users may find it easier to enter and edit their data in a web interface and then have that data available on their device, or they may want to collect data over time and then upload it to a central storage area.
来源：https://stackoverflow.com/questions/32615361/synchronizing-data-between-sqlite-android-and-ms-sql-hosting