R.java に KeyCode があった（ていうか KeyEvent.java）

~/out/target/common/obj/APPS/framework-res_intermediates/src/android/R.java
~/frameworks/base/core/java/android/view/KeyEvent.java

Constant	Value
`KEYCODE_UNKNOWN`	0
`KEYCODE_SOFT_LEFT`	1
`KEYCODE_SOFT_RIGHT`	2
`KEYCODE_HOME`	3
`KEYCODE_BACK`	4
`KEYCODE_CALL`	5
`KEYCODE_ENDCALL`	6
`KEYCODE_0`	7
`KEYCODE_1`	8
`KEYCODE_2`	9
`KEYCODE_3`	10
`KEYCODE_4`	11
`KEYCODE_5`	12
`KEYCODE_6`	13
`KEYCODE_7`	14
`KEYCODE_8`	15
`KEYCODE_9`	16
`KEYCODE_STAR`	17
`KEYCODE_POUND`	18
`KEYCODE_DPAD_UP`	19
`KEYCODE_DPAD_DOWN`	20
`KEYCODE_DPAD_LEFT`	21
`KEYCODE_DPAD_RIGHT`	22
`KEYCODE_DPAD_CENTER`	23
`KEYCODE_VOLUME_UP`	24
`KEYCODE_VOLUME_DOWN`	25
`KEYCODE_POWER`	26
`KEYCODE_CAMERA`	27
`KEYCODE_CLEAR`	28
`KEYCODE_A`	29
`KEYCODE_B`	30
`KEYCODE_C`	31
`KEYCODE_D`	32
`KEYCODE_E`	33
`KEYCODE_F`	34
`KEYCODE_G`	35
`KEYCODE_H`	36
`KEYCODE_I`	37
`KEYCODE_J`	38
`KEYCODE_K`	39
`KEYCODE_L`	40
`KEYCODE_M`	41
`KEYCODE_N`	42
`KEYCODE_O`	43
`KEYCODE_P`	44
`KEYCODE_Q`	45
`KEYCODE_R`	46
`KEYCODE_S`	47
`KEYCODE_T`	48
`KEYCODE_U`	49
`KEYCODE_V`	50
`KEYCODE_W`	51
`KEYCODE_X`	52
`KEYCODE_Y`	53
`KEYCODE_Z`	54
`KEYCODE_COMMA`	55
`KEYCODE_PERIOD`	56
`KEYCODE_ALT_LEFT`	57
`KEYCODE_ALT_RIGHT`	58
`KEYCODE_SHIFT_LEFT`	59
`KEYCODE_SHIFT_RIGHT`	60
`KEYCODE_TAB`	61
`KEYCODE_SPACE`	62
`KEYCODE_SYM`	63
`KEYCODE_EXPLORER`	64
`KEYCODE_ENVELOPE`	65
`KEYCODE_ENTER`	66
`KEYCODE_DEL`	67
`KEYCODE_GRAVE`	68
`KEYCODE_MINUS`	69
`KEYCODE_EQUALS`	70
`KEYCODE_LEFT_BRACKET`	71
`KEYCODE_RIGHT_BRACKET`	72
`KEYCODE_BACKSLASH`	73
`KEYCODE_SEMICOLON`	74
`KEYCODE_APOSTROPHE`	75
`KEYCODE_SLASH`	76
`KEYCODE_AT`	77
`KEYCODE_NUM`	78
`KEYCODE_HEADSETHOOK`	79
`KEYCODE_FOCUS`	80
`KEYCODE_PLUS`	81
`KEYCODE_MENU`	82
`KEYCODE_NOTIFICATION`	83
`KEYCODE_SEARCH`	84
`KEYCODE_MEDIA_PLAY_PAUSE`	85
`KEYCODE_MEDIA_STOP`	86
`KEYCODE_MEDIA_NEXT`	87
`KEYCODE_MEDIA_PREVIOUS`	88
`KEYCODE_MEDIA_REWIND`	89
`KEYCODE_MEDIA_FAST_FORWARD`	90
`KEYCODE_MUTE`	91