broadcast receiver

基本解釋

A broadcast receiver is a component that responds to system-wide broadcast announcements.
一個broadcast receiver是響應(yīng)全系統(tǒng)廣播通知的一個組件。
A broadcast receiver is implemented as a subclass of BroadcastReceiver and each broadcast is delivered as an Intent object.
一個broadcast receiver通過繼承BroadcastReceiver類來實現(xiàn)，每個broadcast被作為一個Intent對象發(fā)布。
More commonly, though, a broadcast receiver is just a "gateway" to other components and is intended to do a very minimal amount of work.
但是，更常見的情況是，broadcast receiver只作為其他組件的“出入口”(gateway)，其本身做的工作非常少。