public final class Looper: 官方的API: Class used to run a message loop for a thread. Threads by default do not have a message loop associated with them; to create one, call prepare() in the thread that is to run the loop, and then loop() to have it proc…
public abstract class Service; [API文档关于Service类的介绍] A Service is an application component representing either an application's desire to perform a longer-running operation while not interacting with the user or to supply functionality for other appli…