Android Question how can i use system download to update app

[shugeyi]

hello:i want to auto update my app from a webserver, i find appupdating lib ,but it download app by itself. i find most app on android use system download to update app ,how can i do?

 

[Erel]

Apps installed from Google Play Store will be updated automatically (based on the user settings). There is no other automatic way to update you app.

 

[AlpVir]

I dare contradict Erel (!) And inform you that you can automate the updating of an app.
1) at the start of the app can be checked on the date of the new web version of the app; you must read the header "Last-Modified" the apk file
2) compares this data with that of the app already installed.
3) it acts accordingly