这是Android中自带的一个应用程序，在手机的Settings中，它可以让用户手动打开或关闭Wi-Fi功能。当用户打开Wi-Fi功能后，它会自动搜索周围的无线网络，并以列表的形式显示，供用户选择，默认会连接用户上一次成功连接的无线网络。(This is an Android comes with an application, in the phone's Settings, it allows users to manually turn on or off Wi-Fi function. When the user opens the Wi-Fi function, it will automatically search the surrounding wireless network, and the list of the form shown for the user to choose, the default will be connected to the last successful connection of the wireless network.)