cordova - Reliable Background Geolocation Service on Android in JavaScript -

-

the app should track user in background, calculations on locations received , notify user of events of interest.

the logic has been written in javascript (for post-mortem analysis). so, not re-implement same in java/swift, i'm aiming cordova/reactnative/nativescript/titanium.

android kill backgrounded app in tight memory conditions. make background operation more reliable, android service used. 1 make service "foreground" tell os user aware of service , service of importance user. os kill such app/service process. when ask re-start service asap.

the problem looks javascript vm not started service , there no way run javascript logic. same problem frameworks mentioned.

thus, service must all-native , re-implementation of logic.

questions:

  1. are findings correct? i.e. in either mentioned framework there no easy way re-start javascript vm service?

  2. somewhere on saw trick service ran (invisible) activity instantiated vm again. possible? can give link/explanation?

  3. how android kill process hosting "foreground" service? maybe ignore case.

thank you.

i have app reliant on reliable background geolocation on android (and ios).

after trying many approaches (including own native solutions) have settled on cordova-background-geolocation-lt (also available react native , nativescript).

it's paid-for solution (not free), there's reason that: in extensive real-world field testing, solution work reliably on os versions (including android 8 , ios 11) - android 8 in particular challenge due new background geolocation limits.

in answer questions, in practice have found solution reliable on android when using foregroundservice option, app able run continuously several hours no interruption.


Comments

Post a Comment

Popular posts from this blog

ios - MKAnnotationView layer is not of expected type: MKLayer -

-
Image
so code works fine logger riddled message. there way rid of or suppress it? postannotation.swift class postannotation: mkpointannotation { //mark: properties let post: post //mark: initialization init(post: post) { self.post = post super.init() self.coordinate = cllocationcoordinate2d(latitude: post.latitude, longitude: post.longitude) self.title = post.title self.subtitle = post.timestring() } } adding annotation let annotation = postannotation(post: post) self.map.addannotation(annotation) func mapview func mapview(_ mapview: mkmapview, viewfor annotation: mkannotation) -> mkannotationview? { if annotation mkuserlocation { return nil } var annotationview = mapview.dequeuereusableannotationview(withidentifier: "pin") as? mkpinannotationview if annotationview == nil { annotationview = mkpinannotationview(annotation: annotation, reuseidentifier: "pin")
Read more

ZeroMQ on Windows, with Qt Creator -

-
i have installed zmq link given below on windows 7. http://zeromq.org/distro:microsoft-windows 1) have c++ project in qt-creator , i'm using zmq c++ binding (zhelpers.hpp etc). 2) have added .lib installed zmq folder qtcreator 3) while compiling, compiler looks _imp__zmq_verion, in .dll files present in .lib have __imp_zmq_version. 4) causing undefined reference zmq_version. anyone else faced problem , has solution ?
Read more

unity3d - Unity SceneManager.LoadScene quits application -

-
i have 2 different scenes 1 named 'main' , other 'game' both added scenes in load. when use scenemanager.loadscene("game"); works no problem when tried return main scene code if (input.getkeydown (keycode.escape)) { scenemanager.loadscene("main"); } strangely game quits. thanks. sorry interruption. somewhere on other script found code. if (input.getkeydown (keycode.escape)) { application.quit (); } that's bad, know...
Read more