The callback marks an appropriate point in the activity's lifecycle for it to dismiss any notifications that it intends to display "until the user has seen them," such as a blinking LED.
这个回调标记了activity生命周期中的一个恰当的点，可以用来“在用户看过通知之后”将它们清除，如闪烁led灯。
The callback marks an appropriate point in the activity's lifecycle for it to dismiss any notifications that it intends to display "until the user has seen them," such as a blinking LED.
这个回调标记了activity生命周期中的一个恰当的点，可以用来“在用户看过通知之后”将它们清除，如闪烁led灯。
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