I know this is a really old question, but I don't see a clearly answer. Any solution about keeping android app running in background on china devices seems to be not working, so I think about contacting these manufacturer to whitelist my app. Can anyone show me how to do that?
P/s: I know an app can run in background without whitelist (I'm not sure about this, but it's not in list app with auto-start permission when I check), that's Zalo (https://play.google.com/store/apps/details?id=com.zing.zalo), another app can run in background on Oppo device, but not on Xiaomi device(Xiaomi Redmi 4X, with Android 7.1.2, MIUI Global 9.2), that's VN Ngay nay(https://play.google.com/store/apps/details?id=com.xb.topnews), so I still hope there's a way to keep app running in background, please comment if you know, thanks!