android 按键映射qwerty.kl文件中的WAKE和WAKE_DROPPED的定义

android系统中,获取到键盘的键值后,会搜索/system/usr/keylayout/gpio-keys.kl这个文件

key 115   VOLUME_UP         WAKE_DROPPED
key 114   VOLUME_DOWN       WAKE_DROPPED
key 102   HOME              WAKE

如果code与其中的键值相对应,android就会响应对应的按键信息。

 

WAKE: When this key is pressed while the device is asleep, the device will wake up and the key event gets sent to the app.

WAKE_DROPPED: When this key is pressed while the device is asleep, the device will wake up and the key event does not get sent to the app.

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