android police上另一种开启方式，只需要切换英文，然后打开google search，搜索框输入ok google everywhere，然后搜索下就行了。回到你google now的voice设置里就有三个选项了。
Just open the search app and do a text search for "Okay Google Everywhere." That's it. Seriously. Go back to your Google Now voice settings and you should see the Ok Google section now has options for detection on any screen and the lock screen (yes, they are separate toggles).
Just open the search app and do a text search for "Okay Google Everywhere." That's it. Seriously. Go back to your Google Now voice settings and you should see the Ok Google section now has options for detection on any screen and the lock screen (yes, they are separate toggles).
