1.确认驱动中的键值定义

kernel-3.18/include/uapi/linux/input.h

#define KEY_F13                 183

驱动中会上报KEY_F13，对应键值就是183，驱动上报的键值android层会映射成android Keycode

2.*.kl文件中添加键值

/frameworks/base/data/keyboards/Generic.kl

key 183   F13

/frameworks/base/data/keyboards/qwerty.kl

key 183   F13

3.定义键值映射

/frameworks/native/include/input/InputEventLabels.h

数组中添加

static const InputEventLabel KEYCODES[] = {

…..

DEFINE_KEYCODE(F13),

}

/frameworks/native/include/android/keycodes.h

enum {

….

AKEYCODE_F13 = 280

}

4.

/frameworks/base/core/java/android/view/KeyEvent.java

public class KeyEvent extends InputEvent implements Parcelable {

……

 public static final int KEYCODE_F13 = 280;

}

/frameworks/base/core/res/res/values/attrs.xml

<enum name=”KEYCODE_F13″ value=”280″/> 

5.mtk中的定义（current.txt）(根据具体项目添加)
frameworks/base/api/current.txt
field public static final int KEYCODE_F13 = 266;