I am very new to the Android platform. Now in my app I want to create service and so please give me some info that how to create a service and consume it in my app. And how to start the service when the OS starts up?
All the information that should be necessary, including examples on how to create and consume services, is available directly from the Android documentation here.
It is doubtful that any answer could provide more insight into creating and consuming Services then that link.
Related
I need to add a native sticky background service in a flutter application, in order to achieve 2 things:
Starting at boot time and running in background indefinitely
Exchange data with the main Dart activity, in a message passing fashion
However, I cannot find any kind of useful documentation. It seems that for now, you have to choose to go completely native or giving up using low level features and focus only on the UI (until someone pulls a specific plugin out of the hat).
Thus, my question is the following: what is the easiest way to achieve this sort of integration, starting with a basic flutter project ?
Thank you
Make a Sticky Service using native Android service.
The easiest way to exchange data with the main Dart activity is to use deep links or intents.
Note: if you explain more why do you need that, I think I may be able to give you a better solution.
While you can register a BroadcastReceiver to be activated at BOOT your idea of having a service "running in background indefinitely" is highly discouraged in recent version of Android.
Therefore what can you do is have a Broadcast receiver registered in Manifest that will be activate when BOOT completes (See https://developer.android.com/guide/components/broadcasts for a sample) and from here you can use the available API to schedule work. Check out this link to see what from available API best suite you needs.
While there are more complicated solutions you will find that simply sending Intents between components will do the job.
You can use the method channel
Docs : https://docs.flutter.dev/development/platform-integration/platform-channels?tab=type-mappings-swift-tab
I am investigating about a custom system service for AOSP to provide a basic remote control (switching users and starting apps) for the system via network. It should be based on Android 9. For future portability, I would prefer to use rather high-level Java APIs, if possible.
I don't have much knowledge about Android yet on system level. It seems, at least a part of the functionality can be covered by communicating with the Activity Manager, which could be a good starting point.
Some of my questions:
is it intended at all, to have different system services to communicate with each other?
Provided this is possible, how can one system service use other service's functionality? Should this still go through HIDL/binder although all services live in the same process?
Is there an existing system service which does something similiar that could be useful as reference?
is it intended at all, to have different system services to communicate with each other?
Yes, that is intended.
Provided this is possible, how can one system service use other service's functionality? Should this still go through HIDL/binder although all services live in the same process?
HIDL over /dev/hwbinder is intended for HAL to System Service communication. Communication between System Services can still be done with AIDL over /dev/binder. I think you would typically use a services Manager class which will abstract Binder use anyway. This might not be a nice minimalistic example, but you have a look at how the Car service uses the TelephonyManager in CarAudioService.java.
Is there an existing system service which does something similiar that could be useful as reference?
You can have a look at the additional services in packages/services.
There are two type of system services:
1. Running in system_server: they are started in SystemServer.java; apps can call them by XXXManager(eg, ActivityManager); and they also provide some internal api which called by other services in system_server.
2. Running in apps which have system uid or platform permission: they are normal app services; they can do something that third app can't do; they are complied with android source, so then can call hide api.
Type 2 services can meet most needs. So I suggest you to choose Type 2 service. It's more easier to debugged and maintained.
is there a method that I can use to do code when the app is closed? I need to refresh the database and check for incoming polls from other devices.
You'll want to use a service. Here's a starting point for what you'll want to learn. There are many examples and tutorials to be found with a Google search for "android service example"
I'm developing an app (Android 4.0) which relies on a background service to sync specific data from probably sqlite to a remote mysql database.
I am pretty new to Android dev (but not programming) and hence am still struggling with where to begin and how to construct the system. I am planning on leveraging:
"Developing Android REST client applications" by Virgil Dobjanschi (2010)
as a starting point. What he demonstrates is a high level approach to developing such a system which is excellent.
My question is, in two years or so has anything changed, or would this still be considered a viable approach? Any other help you can give having gleened my situation will help me immensely.
Thanks.
Here is an updated approach that I have found very useful
Use an Intent Service to get off the main thread for your requests. If you want more info about services refer to this.
Hope this helps!
I need some help in understanding when and why to use Remote Service instead of local service. There are several cases where one can use a local service. For example: playing music in background, downloading files from network without interrupting the user. But i am unable to found a similar use case scenarios where i have to use Remote Service.
I am very curious about the scenarios where one can use Remote Services.
Any help is appreciated. I dont wanna know how to implement it. I know the technical part on how to implement it, do the interprocess communication. All i want to know is when to use this.
Thanks!!
Remote services are used when different applications need to communicate with said service. Having a service that, say, tracks your location, can be accessed from multiple applications using remote services.