android - Sync server data with Mobile Application -


i have portal , mobile app

i want have proper mechanism data syncing server mobile application

i have 2 approches both not consistent.

below scenario clear question

suppose have 1 sql table testtable @ first android app call server api , server give him data in table testtable

if 1 record updated in testtable when after 1 hour mobile app again call api retrieve data has been updated , yet not sent particular device question how should maintain this

i have 2 approaches 1) add column name updatedatetime in testtable,and when mobile app calls api send , lastsync date time api return data updated after that

2)maintain table eg synctable keep record of each record in testtable , device , if send particular device update record synced

please me in both appproches not consistent both fail ayt point

is there other approach can use???

please comment if question still unclear. thanks


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