¿Cómo vincular el servicio en Android?

How to bind service in android?

A client binds to a service by calling bindService() . When it does, it must provide an implementation of ServiceConnection , which monitors the connection with the service. The return value of bindService() indicates whether the requested service exists and whether the client is permitted access to it.

A bound service allows components (such as activities) to bind to the service, send requests, receive responses, and even perform interprocess communication (IPC). A bound service typically lives only while it serves another application component and does not run in the background indefinitely.

Example of Android Services

1. Step 1: Create a new project. Click on File, then New => New Project. Choose Empty activity. Select language as Java/Kotlin. Select the minimum SDK as per your need.
2. Step 2: Modify strings.xml file. All the strings which are used in the activity are listed in this file. XML.

android.content.ServiceConnection. Known indirect subclasses. MediaScannerConnection. MediaScannerConnection. MediaScannerConnection provides a way for applications to pass a newly created or downloaded media file to the media scanner service.

The bindService () method returns immediately without a value, but when the Android system creates the connection between the client and service, it calls onServiceConnected () on the ServiceConnection, to deliver the IBinder that the client can use to communicate with the service.

If you do allow your service to be started and bound, then when the service has been started, the system does not destroy the service when all clients unbind. Instead, you must explicitly stop the service, by calling stopSelf () or stopService ().

In other words, the system calls the service’s onBind () method to generate the IBinder only when the first client binds. The system then delivers that same IBinder to all additional clients that bind to that same service, without calling onBind () again.

If your service is used only by the local application and does not need to work across processes, then you can implement your own Binder class that provides your client direct access to public methods in the service. Note: This works only if the client and service are in the same application and process, which is most common.