For example, an audio app would use a foreground service to play anĪudio track. These are the three different types of services: ForegroundĪ foreground service performs some operation that is noticeable to the You should run any blocking operations onĪ separate thread within the service to avoid Application Run in a separate process unless you specify otherwise. Process the service does not create its own thread and does not Music, perform file I/O, or interact with a content provider, all from the background.Ĭaution: A service runs in the main thread of its hosting For example, a service can handle network transactions, play Additionally, a component can bind to a service to interact with it and even perform Started, a service might continue running for some time, even after the user switches to anotherĪpplication. You can carry out this to clean up any resources like threads, registered listeners, receivers, and so on allotted in the onCreate() method at the time of service creation.Long-running operations in the background. The system calls this method when the service is no longer being used. The android system calls this method when the service is initially created using onStartCommand() or onBind(). The android system calls this method when an application component have linked to the service, after it had disconnected from the service by calling the method Unbind(). The android system calls method when all components (activity) have disconnected from a specific interface published by the service. If you don’t want to bind the service with an android application component the onBind() method must return null. In this method implementation, you must provide an interface that clients use to communicate with the service that we already started by returning an Ibinder. When another component wants to bind with the service (such as to perform RPC) the system invokes this method by calling bindService(). If you implement the service using the above method, it is your responsibility to stop the service when its work is complete by calling either stopSelf() or stopService(). When the onStartCommand() method executes, the service is started and can run in the background indefinitely. The system invokes this method by calling startService() method when another component ( such as an activity) requests that the service be started. Service Life Cycle Method onStartCommand() Android Service Life CycleĪndroid service life cycle have life cycle methods same as Activity life cycle methods. A bound service offers a client-server interface that allows android application components to interact with the service, send requests, receive results. Ī service is said to be bound when an android application component binds to service by calling the method bindService(). A service can basically exist in two states as shown below: Ī service is said to be started only when an android application component, such as an activity, starts the service by calling the method startService(). As discussed service can running in the background even if the application is killed unless it stops itself by calling stopself() or is stopped by a Android application component by calling stopService().Īs explained above service can either be started or bound. That is the service continues to run in the background even if the user switches to another application.Īdditionally, an android application component can bind to a service for performing interprocess communication (IPC). Android Service does not provide a user interface.Īndroid Service runs indefinitely in the background unless they explicitly stopped or destroyed.Īndroid application component can start a service, and the service continues to run in the background indefinitely, even if the component that started the service is destroyed. Android Service is an application component that is used to perform long-running operations such a playing music in the background, handle network transactions etc all from the background.
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