Android:绑定服务和启动服务之间的差异 [英] Android: Differences between bound and started services
问题描述
我正在尝试确定绑定服务和启动服务之间的主要概念(而非实现)差异.这里是要点:
I am trying to identify the main conceptual (not implementation) differences between a bound and started service. Here are the main points:
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绑定服务允许活动与服务之间进行扩展的双向通信，而已启动的服务无需向客户端活动返回任何结果
A bound service allows extended two way communication between the activity and the service whereas a started service need not return any results to the client activity
绑定服务将为多个客户端提供服务(只要至少有一个客户端绑定到该客户端)，而启动的服务将执行单个操作，然后关闭.(我知道可以绑定一些启动的服务)
A bound service will service multiple clients (as long as there is at least one client bound to it) while a started service performs a single operation and then shuts down. (I am aware that there can be started services which are also bound)
还有其他主要区别吗?
推荐答案
服务是在后台运行的组件，可以执行长时间运行的操作，而无需与用户进行交互.例如，服务可能会在用户处于其他应用程序中时在后台播放音乐，或者可能会在不阻止用户与活动交互的情况下通过网络获取数据.服务实际上可以采取两种状态:
A service is a component that runs in the background to perform long-running operations without needing to interact with the user. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity. A service can essentially take two states:
已启动:当应用程序组件(例如活动)通过调用startService()启动服务时，将启动服务.启动后，即使启动该服务的组件被破坏，服务也可以无限期在后台运行.
Started : A service is started when an application component, such as an activity, starts it by calling startService(). Once started, a service can run in the background indefinitely, even if the component that started it is destroyed.
绑定:当应用程序组件通过调用bindService()绑定到服务时，该服务即被绑定.绑定的服务提供了一个客户端-服务器接口，该接口允许组件与该服务进行交互，发送请求，获取结果，甚至跨进程间通信(IPC)进行交互.
Bound : A service is bound when an application component binds to it by calling bindService(). A bound service offers a client-server interface that allows components to interact with the service, send requests, get results, and even do so across processes with interprocess communication (IPC).
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