1.Creating a Started Service A started service is one that another component starts by calling startService(), resulting in a call to the service's onStartCommand() method. When a service is started, it has a lifecycle that's independent of the compo…

Managing the Lifecycle of a Service The lifecycle of a service is much simpler than that of an activity. However, it's even more important that you pay close attention to how your service is created and destroyed, because a service can run in the bac…

Android Interface Definition Language (AIDL) 1.In this document Defining an AIDL Interface Create the .aidl file Implement the interface Expose the interface to clients Passing Objects over IPC Calling an IPC Method See also Bound Services AIDL (Andr…

Compared to AIDL When you need to perform IPC, using a Messenger for your interface is simpler than implementing it with AIDL, because Messenger queues all calls to the service, whereas, a pure AIDL interface sends simultaneous requests to the servic…

Binding to a Service Application components (clients) can bind to a service by calling bindService(). The Android system then calls the service's onBind() method, which returns an IBinder for interacting with the service. The binding is asynchronous.…

1.Bound Services A bound service is the server in a client-server interface. 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 s…

1.Sending Notifications to the User (发送通知) Once running, a service can notify the user of events using Toast Notifications or Status Bar Notifications. A toast notification is a message that appears on the surface of the current window for a moment t…

Bound Services 1.In this document The Basics Creating a Bound Service Extending the Binder class Using a Messenger Binding to a Service Additional notes Managing the Lifecycle of a Bound Service Key classes Service ServiceConnection IBinder Samples R…

Services 简介和分类 A Service is an application component that can perform long-running operations in the background and does not provide a user interface. Another application component can start a service and it will continue to run in the background eve…

Extending the Binder class 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:…