Android下添加新的自定义键值和按键处理流程

              Android下添加新的自定义键值和按键处理流程

    说出来不怕大家笑话，我写这篇博客的原因在于前几天去一个小公司面试Android系统工程师，然后在面试的时候对方的技术总监问了我一个问题，请你详细描述一下怎么在Android下添加自定义键值和详细描述下Android的按键处理流程。现在回想起来当时回答的确实不是很好，乘着现在比较空闲的时机就来分析下上述的两个问题。
    首先分析下Android下怎么添加新的自定义键值。在Android的原生系统中键值默认情况下是92个，从0-91；一般情况下，这些键值是够用的，但是如果想扩充的话，还是需要添加新的键值的，那么如何将一个新的键值从驱动的设置映射到上层，使应用可以对我们自定义的键值进行相应的处理呢？

    在介绍Android怎么添加新的键值以前先介绍下Android下INPUT子系统FLOW的流程，下面就是精简的流程图示意图：

    1.添加按键及其映射

    1)如果系统有新的按键需要添加，玛门是怎么添加并上报到系统上层去的呢(这里的上层主要指的是Android应用层)，首先要确定的是我们的遥控设备是通过/dev/input目录下那个event调用那个kl文件，这里可以通过如下命令超看cat /proc/bus/input/devices,下面是在终端下的打印信息

"font-family:FangSong_GB2312;font-size:18px;">shell@orange:/ # cat /proc/bus/input/devices
I: Bus=0018 Vendor=3697 Product=0001 Version=0001
N: Name="MStar Smart TV IR Receiver"
P: Phys=/dev/ir
S: Sysfs=/devices/virtual/rc/rc0/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=13
B: KEY=fc0000 0 fc900 142851 0 0 0 0 108000 1a8 c0000c01 9e37c0 48007 f8000000 10000ffc
B: MSC=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="MCE IR Keyboard/Mouse (ir)"
P: Phys=/input0
S: Sysfs=/devices/virtual/input/input1
U: Uniq=
H: Handlers=kbd mouse0 event1
B: PROP=0
B: EV=100017
B: KEY=30000 0 7 ff87207a c14057ff febeffdf ffefffff ffffffff fffffffe
B: REL=3
B: MSC=10

shell@orange:/ #
shell@orange:/ #

通过打印信息我们可以知道，我们的终端设备使用的是Vendor_3697_Product_0001.kl文件，我这里只分析IT遥控设备，那我们的Vendor_3697_Product_0001.kl里面又是啥呢，我们可以通过cat命令查看，具体的信息如下：

"font-family:FangSong_GB2312;font-size:18px;"># Copyright (C) 2010 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

#
# MStar Smart TV IR Receiver.
#

key 116     POWER                   WAKE
key 11      0
key 2       1
key 3       2
key 4       3
key 5       4
key 6       5
key 7       6
key 8       7
key 9       8
key 10      9
key 398     PROG_RED
key 399     PROG_GREEN
key 400     PROG_YELLOW
key 401     PROG_BLUE
key 103     DPAD_UP
key 108     DPAD_DOWN
key 105     DPAD_LEFT
key 106     DPAD_RIGHT
key 28      ENTER
key 402     CHANNEL_UP              WAKE_DROPPED
key 403     CHANNEL_DOWN            WAKE_DROPPED
key 115     VOLUME_UP               WAKE_DROPPED
key 114     VOLUME_DOWN             WAKE_DROPPED
key 104     PAGE_UP
key 109     PAGE_DOWN
key 102     HOME                    WAKE_DROPPED
key 139     MENU                    WAKE_DROPPED
key 158     BACK
key 113     VOLUME_MUTE
key 167     DVR
key 138     GUIDE
key 358     INFO
#key 82      WINDOW
#key 79      TV_INPUT
key 168     MEDIA_REWIND
key 159     MEDIA_FAST_FORWARD
key 165     MEDIA_PREVIOUS
key 163     MEDIA_NEXT
key 207     MEDIA_PLAY
key 119     MEDIA_PAUSE
key 128     MEDIA_STOP

# Common extended
key 392     SOUND_MODE
key 212     PICTURE_MODE
key 372     ASPECT_RATIO
key 363     CHANNEL_RETURN
key 142     SLEEP
key 365     EPG
key 395     LIST
#key 370     SUBTITLE
key 466     MTS
key 467     FREEZE
key 468     TTX
key 469     CC
key 470     TV_SETTING
key 471     SCREENSHOT
key 356     TV_POWER

# Mstar extended
key 59      MSTAR_BALANCE
key 60      MSTAR_INDEX
key 61      MSTAR_HOLD
key 62      MSTAR_UPDATE
key 63      MSTAR_REVEAL
key 64      MSTAR_SUBCODE
key 65      MSTAR_SIZE
key 66      MSTAR_CLOCK

    2)在Vendor_3697_Product_0001.kl文件中添加映射

       key 123 WLS

       说明：

       key -- 是关键字。固定值，不需要改变。
     123 -- 该按键在linux驱动中对应的键值，我在这里只是假设的这个值，至于具体对应的是那个可以查看“include/linux/input.h”
     WLS -- 123按键映射到Android中的按键，它对应是“KeycodeLabels.h”文件中的KEYCODES表格元素的“literal”值。
        其中KeycodeLabels.h的定义如下，我们可以在"MSTAR_PVR_BROWSER", 319后面添加我们需要向Android上层抛的键值，我们这里定义为"WLS", 320,所以当Android上层监听到320的按键值是就是我们新添加的键值了。

"font-family:FangSong_GB2312;font-size:18px;">/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#ifndef _LIBINPUT_KEYCODE_LABELS_H
#define _LIBINPUT_KEYCODE_LABELS_H


#include


struct KeycodeLabel {
    const char *literal;
    int value;
};


static const KeycodeLabel KEYCODES[] = {
    { "SOFT_LEFT", 1 },
    { "SOFT_RIGHT", 2 },
    { "HOME", 3 },
    { "BACK", 4 },
    { "CALL", 5 },
    { "ENDCALL", 6 },
    { "0", 7 },
    { "1", 8 },
    { "2", 9 },
    { "3", 10 },
    { "4", 11 },
    { "5", 12 },
    { "6", 13 },
    { "7", 14 },
    { "8", 15 },
    { "9", 16 },
    { "STAR", 17 },
    { "POUND", 18 },
    { "DPAD_UP", 19 },
    { "DPAD_DOWN", 20 },
    { "DPAD_LEFT", 21 },
    { "DPAD_RIGHT", 22 },
    { "DPAD_CENTER", 23 },
    { "VOLUME_UP", 24 },
    { "VOLUME_DOWN", 25 },
    { "POWER", 26 },
    { "CAMERA", 27 },
    { "CLEAR", 28 },
    { "A", 29 },
    { "B", 30 },
    { "C", 31 },
    { "D", 32 },
    { "E", 33 },
    { "F", 34 },
    { "G", 35 },
    { "H", 36 },
    { "I", 37 },
    { "J", 38 },
    { "K", 39 },
    { "L", 40 },
    { "M", 41 },
    { "N", 42 },
    { "O", 43 },
    { "P", 44 },
    { "Q", 45 },
    { "R", 46 },
    { "S", 47 },
    { "T", 48 },
    { "U", 49 },
    { "V", 50 },
    { "W", 51 },
    { "X", 52 },
    { "Y", 53 },
    { "Z", 54 },
    { "COMMA", 55 },
    { "PERIOD", 56 },
    { "ALT_LEFT", 57 },
    { "ALT_RIGHT", 58 },
    { "SHIFT_LEFT", 59 },
    { "SHIFT_RIGHT", 60 },
    { "TAB", 61 },
    { "SPACE", 62 },
    { "SYM", 63 },
    { "EXPLORER", 64 },
    { "ENVELOPE", 65 },
    { "ENTER", 66 },
    { "DEL", 67 },
    { "GRAVE", 68 },
    { "MINUS", 69 },
    { "EQUALS", 70 },
    { "LEFT_BRACKET", 71 },
    { "RIGHT_BRACKET", 72 },
    { "BACKSLASH", 73 },
    { "SEMICOLON", 74 },
    { "APOSTROPHE", 75 },
    { "SLASH", 76 },
    { "AT", 77 },
    { "NUM", 78 },
    { "HEADSETHOOK", 79 },
    { "FOCUS", 80 },
    { "PLUS", 81 },
    { "MENU", 82 },
    { "NOTIFICATION", 83 },
    { "SEARCH", 84 },
    { "MEDIA_PLAY_PAUSE", 85 },
    { "MEDIA_STOP", 86 },
    { "MEDIA_NEXT", 87 },
    { "MEDIA_PREVIOUS", 88 },
    { "MEDIA_REWIND", 89 },
    { "MEDIA_FAST_FORWARD", 90 },
    { "MUTE", 91 },
    { "PAGE_UP", 92 },
    { "PAGE_DOWN", 93 },
    { "PICTSYMBOLS", 94 },
    { "SWITCH_CHARSET", 95 },
    { "BUTTON_A", 96 },
    { "BUTTON_B", 97 },
    { "BUTTON_C", 98 },
    { "BUTTON_X", 99 },
    { "BUTTON_Y", 100 },
    { "BUTTON_Z", 101 },
    { "BUTTON_L1", 102 },
    { "BUTTON_R1", 103 },
    { "BUTTON_L2", 104 },
    { "BUTTON_R2", 105 },
    { "BUTTON_THUMBL", 106 },
    { "BUTTON_THUMBR", 107 },
    { "BUTTON_START", 108 },
    { "BUTTON_SELECT", 109 },
    { "BUTTON_MODE", 110 },
    { "ESCAPE", 111 },
    { "FORWARD_DEL", 112 },
    { "CTRL_LEFT", 113 },
    { "CTRL_RIGHT", 114 },
    { "CAPS_LOCK", 115 },
    { "SCROLL_LOCK", 116 },
    { "META_LEFT", 117 },
    { "META_RIGHT", 118 },
    { "FUNCTION", 119 },
    { "SYSRQ", 120 },
    { "BREAK", 121 },
    { "MOVE_HOME", 122 },
    { "MOVE_END", 123 },
    { "INSERT", 124 },
    { "FORWARD", 125 },
    { "MEDIA_PLAY", 126 },
    { "MEDIA_PAUSE", 127 },
    { "MEDIA_CLOSE", 128 },
    { "MEDIA_EJECT", 129 },
    { "MEDIA_RECORD", 130 },
    { "F1", 131 },
    { "F2", 132 },
    { "F3", 133 },
    { "F4", 134 },
    { "F5", 135 },
    { "F6", 136 },
    { "F7", 137 },
    { "F8", 138 },
    { "F9", 139 },
    { "F10", 140 },
    { "F11", 141 },
    { "F12", 142 },
    { "NUM_LOCK", 143 },
    { "NUMPAD_0", 144 },
    { "NUMPAD_1", 145 },
    { "NUMPAD_2", 146 },
    { "NUMPAD_3", 147 },
    { "NUMPAD_4", 148 },
    { "NUMPAD_5", 149 },
    { "NUMPAD_6", 150 },
    { "NUMPAD_7", 151 },
    { "NUMPAD_8", 152 },
    { "NUMPAD_9", 153 },
    { "NUMPAD_DIVIDE", 154 },
    { "NUMPAD_MULTIPLY", 155 },
    { "NUMPAD_SUBTRACT", 156 },
    { "NUMPAD_ADD", 157 },
    { "NUMPAD_DOT", 158 },
    { "NUMPAD_COMMA", 159 },
    { "NUMPAD_ENTER", 160 },
    { "NUMPAD_EQUALS", 161 },
    { "NUMPAD_LEFT_PAREN", 162 },
    { "NUMPAD_RIGHT_PAREN", 163 },
    { "VOLUME_MUTE", 164 },
    { "INFO", 165 },
    { "CHANNEL_UP", 166 },
    { "CHANNEL_DOWN", 167 },
    { "ZOOM_IN", 168 },
    { "ZOOM_OUT", 169 },
    { "TV", 170 },
    { "WINDOW", 171 },
    { "GUIDE", 172 },
    { "DVR", 173 },
    { "BOOKMARK", 174 },
    { "CAPTIONS", 175 },
    { "SETTINGS", 176 },
    { "TV_POWER", 177 },
    { "TV_INPUT", 178 },
    { "STB_POWER", 179 },
    { "STB_INPUT", 180 },
    { "AVR_POWER", 181 },
    { "AVR_INPUT", 182 },
    { "PROG_RED", 183 },
    { "PROG_GREEN", 184 },
    { "PROG_YELLOW", 185 },
    { "PROG_BLUE", 186 },
    { "APP_SWITCH", 187 },
    { "BUTTON_1", 188 },
    { "BUTTON_2", 189 },
    { "BUTTON_3", 190 },
    { "BUTTON_4", 191 },
    { "BUTTON_5", 192 },
    { "BUTTON_6", 193 },
    { "BUTTON_7", 194 },
    { "BUTTON_8", 195 },
    { "BUTTON_9", 196 },
    { "BUTTON_10", 197 },
    { "BUTTON_11", 198 },
    { "BUTTON_12", 199 },
    { "BUTTON_13", 200 },
    { "BUTTON_14", 201 },
    { "BUTTON_15", 202 },
    { "BUTTON_16", 203 },
    { "LANGUAGE_SWITCH", 204 },
    { "MANNER_MODE", 205 },
    { "3D_MODE", 206 },
    { "CONTACTS", 207 },
    { "CALENDAR", 208 },
    { "MUSIC", 209 },
    { "CALCULATOR", 210 },
    { "ZENKAKU_HANKAKU", 211 },
    { "EISU", 212 },
    { "MUHENKAN", 213 },
    { "HENKAN", 214 },
    { "KATAKANA_HIRAGANA", 215 },
    { "YEN", 216 },
    { "RO", 217 },
    { "KANA", 218 },
    { "ASSIST", 219 },
    { "BRIGHTNESS_DOWN", 220 },
    { "BRIGHTNESS_UP", 221 },
    { "MEDIA_AUDIO_TRACK", 222 },
    // MStar Android Patch Begin
    // Common section, range 251-300
    { "SOUND_MODE", 251 },
    { "PICTURE_MODE", 252 },
    { "ASPECT_RATIO", 253 },
    { "CHANNEL_RETURN", 254 },
    { "SLEEP", 255 },
    { "EPG", 256 },
    { "LIST", 257 },
    { "SUBTITLE", 258 },
    { "FAVORITE", 259 },
    { "MTS", 260 },
    { "FREEZE", 261 },
    { "TTX", 262 },
    { "CC", 263 },
    { "TV_SETTING", 264 },
    { "SCREENSHOT", 265 },
    { "CLOUD", 266 },
    { "VOICE", 267 },
    { "USB", 268 },
    { "HDMI", 269 },
    { "DISPLAY_MODE", 270 },
    { "SONG_SYSTEM", 271 },
    { "GINGA_BACK", 272},
    { "NETFLIX", 273},
    { "AMAZONE", 274},
    // MStar section, range 301-400
    { "MSTAR_BALANCE", 301 },
    { "MSTAR_INDEX", 302 },
    { "MSTAR_HOLD", 303 },
    { "MSTAR_UPDATE", 304 },
    { "MSTAR_REVEAL", 305 },
    { "MSTAR_SUBCODE", 306 },
    { "MSTAR_SIZE", 307 },
    { "MSTAR_CLOCK", 308 },
    { "MSTAR_STORE_UP", 309 },
    { "MSTAR_TRIANGLE_UP", 310 },
    { "MSTAR_MOVIE", 311 },
    { "MSTAR_FILE", 312 },
    { "MSTAR_STAR_PLUS", 313 },
    { "MSTAR_AUDIO_TRACK", 314 },
    { "MSTAR_OPTIONAL_TIME", 315 },
    { "MSTAR_LOOP", 316 },
    { "MSTAR_INBOX", 317 },
    { "MSTAR_VVOIP", 318 },
    { "MSTAR_PVR_BROWSER", 319 },
    // Haier section, range 401-500
    { "HAIER_TASK", 401 },
    { "HAIER_USB", 402 },
    { "HAIER_TOOLS", 403 },
    { "HAIER_POWERSLEEP", 404 },
    { "HAIER_WAKEUP", 405 },
    { "HAIER_UNMUTE", 406 },
    { "HAIER_CLEANSEARCH", 407 },
    // Konka section, range 501-600
    { "KONKA_YPBPR", 501 },
    { "KONKA_THREEPOINT_LOONPRESS", 502 },
    { "KONKA_THREEPOINT_COLLECT", 503 },
    { "KONKA_THREEPOINT_DISPERSE", 504 },
    { "KONKA_VOICESWITCH", 505 },
    { "KONKA_FLYIMEFINGER_SELECT", 506 },
    { "KONKA_FLYIMEFINGER_CANCEL", 507 },
    { "KONKA_SOUNDOUTPUT_ENABLE", 508 },
    { "KONKA_SOUNDOUTPUT_DISABLE", 509 },
    { "KONKA_BESTV_EXIT", 510 },
    { "KONKA_BESTV_FORWARD", 511 },
    { "KONKA_BESTV_BACKWARD", 512 },
    { "KONKA_ENTER_FACTORY", 513 },
    { "KONKA_FACTORY_BAKE_TV", 514 },
    // Skyworth section, range 601-700


    // Tcl section, range 4001-4099
    { "TCL_MITV", 4001 },
    { "TCL_USB_MENU", 4002 },
    { "TCL_SWING_R1", 4003 },
    { "TCL_SWING_R2", 4004 },
    { "TCL_SWING_R3", 4005 },
    { "TCL_SWING_R4", 4006 },
    { "TCL_SWING_L1", 4007 },
    { "TCL_SWING_L2", 4008 },
    { "TCL_SWING_L3", 4009 },
    { "TCL_SWING_L4", 4010},
    { "TCL_WIDGET", 4011},
    { "TCL_VGR_LEFT", 4012},
    { "TCL_VGR_RIGHT", 4013 },
    { "TCL_VGR_TAP", 4014 },
    { "TCL_VGR_WAVE", 4015 },
    { "TCL_VGR_WAVE_LEFT", 4016 },
    { "TCL_VGR_WAVE_RIGHT", 4017 },
    { "TCL_VGR_ACTIVE", 4018 },
    { "TCL_VGR_DEACTIVE", 4019 },
    { "TCL_BODY_SENSOR", 4020 },
    { "TCL_CIRCLE_CLOCKWISE", 4021 },
    { "TCL_CIRCLE_CTR_CLOCKWISE", 4022 },
    { "TCL_GESTURE_X", 4023 },
    { "TCL_GESTURE_ALPHA", 4024 },
    { "TCL_GESTURE_MUTE", 4025 },
    { "TCL_UP", 4026 },
    { "TCL_DOWN", 4027 },
    { "TCL_LEFT", 4028 },
    { "TCL_RIGHT", 4029 },
    { "TCL_UP_LEFT", 4030 },
    { "TCL_UP_RIGHT", 4031 },
    { "TCL_DOWN_LEFT", 4032 },
    { "TCL_DOWN_RIGHT", 4033 },
    // Changhong section, range 4101-4199
    { "CHANGHONGIR_MUTE", 4101 },
    { "CHANGHONGIR_INPUT", 4102 },
    { "CHANGHONGIR_DEL", 4103 },
    { "CHANGHONGIR_MENU", 4104 },
    { "CHANGHONGIR_CORN", 4105 },
    { "CHANGHONGIR_OK", 4106 },
    { "CHANGHONGIR_FLCK_FU", 4107 },
    { "CHANGHONGIR_FLCK_FD", 4108 },
    { "CHANGHONGIR_FLCK_FL", 4109 },
    { "CHANGHONGIR_FLCK_FR", 4110 },
    { "CHANGHONGIR_FLCK_SU", 4111 },
    { "CHANGHONGIR_FLCK_SD", 4112 },
    { "CHANGHONGIR_FLCK_SL", 4113 },
    { "CHANGHONGIR_FLCK_SR", 4114 },
    { "CHANGHONGIR_PINCH", 4115 },
    { "CHANGHONGIR_SPREAD", 4116 },
    { "CHANGHONGIR_VOICE", 4117 },
    { "CHANGHONGIR_HAND", 4118 },
    { "CHANGHONGIR_3D", 4119 },
    { "CHANGHONGIR_HELP", 4120 },
    { "CHANGHONGIR_APP", 4121 },
    { "CHANGHONGIR_MOUSE", 4122 },
    { "CHANGHONGIR_EPG", 4123 },
    { "CHANGHONGIR_HOME", 4124 },
    { "CHANGHONGIR_SETTINGS", 4125 },
    // Hisense section, range 4201-4299
    { "HISENSE_G_SENSOR", 4201 },
    { "HISENSE_LOW_BATTERY", 4202 },
    { "HISENSE_SLIDEUP", 4203 },
    { "HISENSE_SLIDEDOWN", 4204 },
    { "HISENSE_SLIDELEFT", 4205 },
    { "HISENSE_SLIDERIGHT", 4206 },
    { "HISENSE_RAPID_SLIDEUP", 4207 },
    { "HISENSE_RAPID_SLIDEDOWN", 4208 },
    { "HISENSE_RAPID_SLIDELEFT", 4209 },
    { "HISENSE_RAPID_SLIDERIGHT", 4210 },
    { "HISENSE_FAC_NEC_M", 4211 },
    { "HISENSE_FAC_NEC_IP", 4212 },
    { "HISENSE_FAC_NEC_SAVE", 4213 },
    { "HISENSE_FAC_NEC_3D", 4214 },
    { "HISENSE_FAC_NEC_PC", 4215 },
    { "HISENSE_FAC_NEC_LOGO", 4216 },
    { "HISENSE_FAC_NEC_YPBPR", 4217 },
    { "HISENSE_FAC_NEC_HDMI", 4218 },
    { "HISENSE_FAC_NEC_F1", 4219 },
    { "HISENSE_FAC_NEC_F2", 4220 },
    { "HISENSE_FAC_NEC_F3", 4221 },
    { "HISENSE_FAC_NEC_F4", 4222 },
    { "HISENSE_FAC_NEC_F5", 4223 },
    { "HISENSE_FAC_NEC_F6", 4224 },
    { "HISENSE_FAC_NEC_F7", 4225 },
    { "HISENSE_FAC_NEC_OK", 4226 },
    { "HISENSE_FAC_NEC_MAC", 4227 },
    { "HISENSE_FAC_NEC_AV", 4228 },
    { "HISENSE_FAC_NEC_PATTERN", 4229 },
    { "HISENSE_FAC_NEC_AGING", 4230 },
    { "HISENSE_FAC_NEC_BALANCE", 4231 },
    { "HISENSE_FAC_NEC_ADC", 4232 },
    { "HISENSE_FAC_NEC_RDRV_INCREASE", 4233 },
    { "HISENSE_FAC_NEC_RDRV_DECREASE", 4234 },
    { "HISENSE_FAC_NEC_GDRV_INCREASE", 4235 },
    { "HISENSE_FAC_NEC_GDRV_DECREASE", 4236 },
    { "HISENSE_FAC_NEC_BDRV_INCREASE", 4237 },
    { "HISENSE_FAC_NEC_BDRV_DECREASE", 4238 },
    { "HISENSE_FAC_NEC_RCUT_INCREASE", 4239 },
    { "HISENSE_FAC_NEC_RCUT_DECREASE", 4240 },
    { "HISENSE_FAC_NEC_GCUT_INCREASE", 4241 },
    { "HISENSE_FAC_NEC_GCUT_DECREASE", 4242 },
    { "HISENSE_FAC_NEC_BCUT_INCREASE", 4243 },
    { "HISENSE_FAC_NEC_BCUT_DECREASE", 4244 },
    { "HISENSE_PRODUCT_SCAN_START", 4245 },
    { "HISENSE_PRODUCT_SCAN_OVER", 4246 },
    { "HISENSE_TEST_BROAD_TV", 4247 },
    { "HISENSE_TEST_BROAD_DTV", 4248 },
    { "HISENSE_TEST_BROAD_AV1", 4249 },
    { "HISENSE_TEST_BROAD_AV2", 4250 },
    { "HISENSE_TEST_BROAD_AV3", 4251 },
    { "HISENSE_TEST_BROAD_SVIDEO1", 4252 },
    { "HISENSE_TEST_BROAD_SVIDEO2", 4253 },
    { "HISENSE_TEST_BROAD_SVIDEO3", 4254 },
    { "HISENSE_TEST_BROAD_SCART1", 4255 },
    { "HISENSE_TEST_BROAD_SCART2", 4256 },
    { "HISENSE_TEST_BROAD_SCART3", 4257 },
    { "HISENSE_TEST_BOARD_YPBPR1", 4258 },
    { "HISENSE_TEST_BOARD_YPBPR2", 4259 },
    { "HISENSE_TEST_BOARD_YPBPR3", 4260 },
    { "HISENSE_TEST_BOARD_VGA", 4261 },
    { "HISENSE_TEST_BOARD_HDMI1", 4262 },
    { "HISENSE_TEST_BOARD_HDMI2", 4263 },
    { "HISENSE_TEST_BOARD_HDMI3", 4264 },
    { "HISENSE_TEST_BOARD_HDMI4", 4265 },
    { "HISENSE_TEST_BOARD_HDMI5", 4266 },
    { "HISENSE_TEST_BOARD_DMP", 4267 },
    { "HISENSE_TEST_BOARD_EMP", 4268 },
    { "HISENSE_TEST_BOARD_AUTOCOLOR", 4269 },
    { "HISENSE_TEST_BOARD_SAVE", 4270 },
    { "HISENSE_TEST_BOARD_TELITEXT", 4271 },
    { "HISENSE_TEST_BOARD_SAPL", 4272 },
    { "HISENSE_TEST_BOARD_VCHIP", 4273 },
    { "HISENSE_TEST_BOARD_CCD", 4274 },
    { "HISENSE_TEST_BOARD_BTSC", 4275 },
    { "HISENSE_TEST_BOARD_FAC_OK", 4276 },
    // MStar Android Patch End


    // NOTE: If you add a new keycode here you must also add it to several other files.
    //       Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.


    { NULL, 0 }
};


// NOTE: If you edit these flags, also edit policy flags in Input.h.
static const KeycodeLabel FLAGS[] = {
    { "WAKE", 0x00000001 },
    { "WAKE_DROPPED", 0x00000002 },
    { "SHIFT", 0x00000004 },
    { "CAPS_LOCK", 0x00000008 },
    { "ALT", 0x00000010 },
    { "ALT_GR", 0x00000020 },
    { "MENU", 0x00000040 },
    { "LAUNCHER", 0x00000080 },
    { "VIRTUAL", 0x00000100 },
    { "FUNCTION", 0x00000200 },
    { NULL, 0 }
};


static const KeycodeLabel AXES[] = {
    { "X", 0 },
    { "Y", 1 },
    { "PRESSURE", 2 },
    { "SIZE", 3 },
    { "TOUCH_MAJOR", 4 },
    { "TOUCH_MINOR", 5 },
    { "TOOL_MAJOR", 6 },
    { "TOOL_MINOR", 7 },
    { "ORIENTATION", 8 },
    { "VSCROLL", 9 },
    { "HSCROLL", 10 },
    { "Z", 11 },
    { "RX", 12 },
    { "RY", 13 },
    { "RZ", 14 },
    { "HAT_X", 15 },
    { "HAT_Y", 16 },
    { "LTRIGGER", 17 },
    { "RTRIGGER", 18 },
    { "THROTTLE", 19 },
    { "RUDDER", 20 },
    { "WHEEL", 21 },
    { "GAS", 22 },
    { "BRAKE", 23 },
    { "DISTANCE", 24 },
    { "TILT", 25 },
    { "GENERIC_1", 32 },
    { "GENERIC_2", 33 },
    { "GENERIC_3", 34 },
    { "GENERIC_4", 35 },
    { "GENERIC_5", 36 },
    { "GENERIC_6", 37 },
    { "GENERIC_7", 38 },
    { "GENERIC_8", 39 },
    { "GENERIC_9", 40 },
    { "GENERIC_10", 41 },
    { "GENERIC_11", 42 },
    { "GENERIC_12", 43 },
    { "GENERIC_13", 44 },
    { "GENERIC_14", 45 },
    { "GENERIC_15", 46 },
    { "GENERIC_16", 47 },


    // NOTE: If you add a new axis here you must also add it to several other files.
    //       Refer to frameworks/base/core/java/android/view/MotionEvent.java for the full list.


    { NULL, -1 }
};


#endif // _LIBINPUT_KEYCODE_LABELS_H

    3)在/frameworks/native/include/android/keycodes.h中添加如下的

    AKEYCODE_MSTAR_WLS          = 320，下面看下该文件的定义

"font-family:FangSong_GB2312;font-size:18px;">/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef _ANDROID_KEYCODES_H
#define _ANDROID_KEYCODES_H

/******************************************************************
 *
 * IMPORTANT NOTICE:
 *
 *   This file is part of Android's set of stable system headers
 *   exposed by the Android NDK (Native Development Kit).
 *
 *   Third-party source AND binary code relies on the definitions
 *   here to be FROZEN ON ALL UPCOMING PLATFORM RELEASES.
 *
 *   - DO NOT MODIFY ENUMS (EXCEPT IF YOU ADD NEW 32-BIT VALUES)
 *   - DO NOT MODIFY CONSTANTS OR FUNCTIONAL MACROS
 *   - DO NOT CHANGE THE SIGNATURE OF FUNCTIONS IN ANY WAY
 *   - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES
 */

#include

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Key codes.
 */
enum {
    AKEYCODE_UNKNOWN         = 0,
    AKEYCODE_SOFT_LEFT       = 1,
    AKEYCODE_SOFT_RIGHT      = 2,
    AKEYCODE_HOME            = 3,
    AKEYCODE_BACK            = 4,
    AKEYCODE_CALL            = 5,
    AKEYCODE_ENDCALL         = 6,
    AKEYCODE_0               = 7,
    AKEYCODE_1               = 8,
    AKEYCODE_2               = 9,
    AKEYCODE_3               = 10,
    AKEYCODE_4               = 11,
    AKEYCODE_5               = 12,
    AKEYCODE_6               = 13,
    AKEYCODE_7               = 14,
    AKEYCODE_8               = 15,
    AKEYCODE_9               = 16,
    AKEYCODE_STAR            = 17,
    AKEYCODE_POUND           = 18,
    AKEYCODE_DPAD_UP         = 19,
    AKEYCODE_DPAD_DOWN       = 20,
    AKEYCODE_DPAD_LEFT       = 21,
    AKEYCODE_DPAD_RIGHT      = 22,
    AKEYCODE_DPAD_CENTER     = 23,
    AKEYCODE_VOLUME_UP       = 24,
    AKEYCODE_VOLUME_DOWN     = 25,
    AKEYCODE_POWER           = 26,
    AKEYCODE_CAMERA          = 27,
    AKEYCODE_CLEAR           = 28,
    AKEYCODE_A               = 29,
    AKEYCODE_B               = 30,
    AKEYCODE_C               = 31,
    AKEYCODE_D               = 32,
    AKEYCODE_E               = 33,
    AKEYCODE_F               = 34,
    AKEYCODE_G               = 35,
    AKEYCODE_H               = 36,
    AKEYCODE_I               = 37,
    AKEYCODE_J               = 38,
    AKEYCODE_K               = 39,
    AKEYCODE_L               = 40,
    AKEYCODE_M               = 41,
    AKEYCODE_N               = 42,
    AKEYCODE_O               = 43,
    AKEYCODE_P               = 44,
    AKEYCODE_Q               = 45,
    AKEYCODE_R               = 46,
    AKEYCODE_S               = 47,
    AKEYCODE_T               = 48,
    AKEYCODE_U               = 49,
    AKEYCODE_V               = 50,
    AKEYCODE_W               = 51,
    AKEYCODE_X               = 52,
    AKEYCODE_Y               = 53,
    AKEYCODE_Z               = 54,
    AKEYCODE_COMMA           = 55,
    AKEYCODE_PERIOD          = 56,
    AKEYCODE_ALT_LEFT        = 57,
    AKEYCODE_ALT_RIGHT       = 58,
    AKEYCODE_SHIFT_LEFT      = 59,
    AKEYCODE_SHIFT_RIGHT     = 60,
    AKEYCODE_TAB             = 61,
    AKEYCODE_SPACE           = 62,
    AKEYCODE_SYM             = 63,
    AKEYCODE_EXPLORER        = 64,
    AKEYCODE_ENVELOPE        = 65,
    AKEYCODE_ENTER           = 66,
    AKEYCODE_DEL             = 67,
    AKEYCODE_GRAVE           = 68,
    AKEYCODE_MINUS           = 69,
    AKEYCODE_EQUALS          = 70,
    AKEYCODE_LEFT_BRACKET    = 71,
    AKEYCODE_RIGHT_BRACKET   = 72,
    AKEYCODE_BACKSLASH       = 73,
    AKEYCODE_SEMICOLON       = 74,
    AKEYCODE_APOSTROPHE      = 75,
    AKEYCODE_SLASH           = 76,
    AKEYCODE_AT              = 77,
    AKEYCODE_NUM             = 78,
    AKEYCODE_HEADSETHOOK     = 79,
    AKEYCODE_FOCUS           = 80,   // *Camera* focus
    AKEYCODE_PLUS            = 81,
    AKEYCODE_MENU            = 82,
    AKEYCODE_NOTIFICATION    = 83,
    AKEYCODE_SEARCH          = 84,
    AKEYCODE_MEDIA_PLAY_PAUSE= 85,
    AKEYCODE_MEDIA_STOP      = 86,
    AKEYCODE_MEDIA_NEXT      = 87,
    AKEYCODE_MEDIA_PREVIOUS  = 88,
    AKEYCODE_MEDIA_REWIND    = 89,
    AKEYCODE_MEDIA_FAST_FORWARD = 90,
    AKEYCODE_MUTE            = 91,
    AKEYCODE_PAGE_UP         = 92,
    AKEYCODE_PAGE_DOWN       = 93,
    AKEYCODE_PICTSYMBOLS     = 94,
    AKEYCODE_SWITCH_CHARSET  = 95,
    AKEYCODE_BUTTON_A        = 96,
    AKEYCODE_BUTTON_B        = 97,
    AKEYCODE_BUTTON_C        = 98,
    AKEYCODE_BUTTON_X        = 99,
    AKEYCODE_BUTTON_Y        = 100,
    AKEYCODE_BUTTON_Z        = 101,
    AKEYCODE_BUTTON_L1       = 102,
    AKEYCODE_BUTTON_R1       = 103,
    AKEYCODE_BUTTON_L2       = 104,
    AKEYCODE_BUTTON_R2       = 105,
    AKEYCODE_BUTTON_THUMBL   = 106,
    AKEYCODE_BUTTON_THUMBR   = 107,
    AKEYCODE_BUTTON_START    = 108,
    AKEYCODE_BUTTON_SELECT   = 109,
    AKEYCODE_BUTTON_MODE     = 110,
    AKEYCODE_ESCAPE          = 111,
    AKEYCODE_FORWARD_DEL     = 112,
    AKEYCODE_CTRL_LEFT       = 113,
    AKEYCODE_CTRL_RIGHT      = 114,
    AKEYCODE_CAPS_LOCK       = 115,
    AKEYCODE_SCROLL_LOCK     = 116,
    AKEYCODE_META_LEFT       = 117,
    AKEYCODE_META_RIGHT      = 118,
    AKEYCODE_FUNCTION        = 119,
    AKEYCODE_SYSRQ           = 120,
    AKEYCODE_BREAK           = 121,
    AKEYCODE_MOVE_HOME       = 122,
    AKEYCODE_MOVE_END        = 123,
    AKEYCODE_INSERT          = 124,
    AKEYCODE_FORWARD         = 125,
    AKEYCODE_MEDIA_PLAY      = 126,
    AKEYCODE_MEDIA_PAUSE     = 127,
    AKEYCODE_MEDIA_CLOSE     = 128,
    AKEYCODE_MEDIA_EJECT     = 129,
    AKEYCODE_MEDIA_RECORD    = 130,
    AKEYCODE_F1              = 131,
    AKEYCODE_F2              = 132,
    AKEYCODE_F3              = 133,
    AKEYCODE_F4              = 134,
    AKEYCODE_F5              = 135,
    AKEYCODE_F6              = 136,
    AKEYCODE_F7              = 137,
    AKEYCODE_F8              = 138,
    AKEYCODE_F9              = 139,
    AKEYCODE_F10             = 140,
    AKEYCODE_F11             = 141,
    AKEYCODE_F12             = 142,
    AKEYCODE_NUM_LOCK        = 143,
    AKEYCODE_NUMPAD_0        = 144,
    AKEYCODE_NUMPAD_1        = 145,
    AKEYCODE_NUMPAD_2        = 146,
    AKEYCODE_NUMPAD_3        = 147,
    AKEYCODE_NUMPAD_4        = 148,
    AKEYCODE_NUMPAD_5        = 149,
    AKEYCODE_NUMPAD_6        = 150,
    AKEYCODE_NUMPAD_7        = 151,
    AKEYCODE_NUMPAD_8        = 152,
    AKEYCODE_NUMPAD_9        = 153,
    AKEYCODE_NUMPAD_DIVIDE   = 154,
    AKEYCODE_NUMPAD_MULTIPLY = 155,
    AKEYCODE_NUMPAD_SUBTRACT = 156,
    AKEYCODE_NUMPAD_ADD      = 157,
    AKEYCODE_NUMPAD_DOT      = 158,
    AKEYCODE_NUMPAD_COMMA    = 159,
    AKEYCODE_NUMPAD_ENTER    = 160,
    AKEYCODE_NUMPAD_EQUALS   = 161,
    AKEYCODE_NUMPAD_LEFT_PAREN = 162,
    AKEYCODE_NUMPAD_RIGHT_PAREN = 163,
    AKEYCODE_VOLUME_MUTE     = 164,
    AKEYCODE_INFO            = 165,
    AKEYCODE_CHANNEL_UP      = 166,
    AKEYCODE_CHANNEL_DOWN    = 167,
    AKEYCODE_ZOOM_IN         = 168,
    AKEYCODE_ZOOM_OUT        = 169,
    AKEYCODE_TV              = 170,
    AKEYCODE_WINDOW          = 171,
    AKEYCODE_GUIDE           = 172,
    AKEYCODE_DVR             = 173,
    AKEYCODE_BOOKMARK        = 174,
    AKEYCODE_CAPTIONS        = 175,
    AKEYCODE_SETTINGS        = 176,
    AKEYCODE_TV_POWER        = 177,
    AKEYCODE_TV_INPUT        = 178,
    AKEYCODE_STB_POWER       = 179,
    AKEYCODE_STB_INPUT       = 180,
    AKEYCODE_AVR_POWER       = 181,
    AKEYCODE_AVR_INPUT       = 182,
    AKEYCODE_PROG_RED        = 183,
    AKEYCODE_PROG_GREEN      = 184,
    AKEYCODE_PROG_YELLOW     = 185,
    AKEYCODE_PROG_BLUE       = 186,
    AKEYCODE_APP_SWITCH      = 187,
    AKEYCODE_BUTTON_1        = 188,
    AKEYCODE_BUTTON_2        = 189,
    AKEYCODE_BUTTON_3        = 190,
    AKEYCODE_BUTTON_4        = 191,
    AKEYCODE_BUTTON_5        = 192,
    AKEYCODE_BUTTON_6        = 193,
    AKEYCODE_BUTTON_7        = 194,
    AKEYCODE_BUTTON_8        = 195,
    AKEYCODE_BUTTON_9        = 196,
    AKEYCODE_BUTTON_10       = 197,
    AKEYCODE_BUTTON_11       = 198,
    AKEYCODE_BUTTON_12       = 199,
    AKEYCODE_BUTTON_13       = 200,
    AKEYCODE_BUTTON_14       = 201,
    AKEYCODE_BUTTON_15       = 202,
    AKEYCODE_BUTTON_16       = 203,
    AKEYCODE_LANGUAGE_SWITCH = 204,
    AKEYCODE_MANNER_MODE     = 205,
    AKEYCODE_3D_MODE         = 206,
    AKEYCODE_CONTACTS        = 207,
    AKEYCODE_CALENDAR        = 208,
    AKEYCODE_MUSIC           = 209,
    AKEYCODE_CALCULATOR      = 210,
    AKEYCODE_ZENKAKU_HANKAKU = 211,
    AKEYCODE_EISU            = 212,
    AKEYCODE_MUHENKAN        = 213,
    AKEYCODE_HENKAN          = 214,
    AKEYCODE_KATAKANA_HIRAGANA = 215,
    AKEYCODE_YEN             = 216,
    AKEYCODE_RO              = 217,
    AKEYCODE_KANA            = 218,
    AKEYCODE_ASSIST          = 219,
    AKEYCODE_BRIGHTNESS_DOWN = 220,
    AKEYCODE_BRIGHTNESS_UP   = 221,
    AKEYCODE_MEDIA_AUDIO_TRACK = 222,
    // MStar Android Patch Begin
    // Common section, range 251-300
    AKEYCODE_SOUND_MODE                 = 251,
    AKEYCODE_PICTURE_MODE               = 252,
    AKEYCODE_ASPECT_RATIO               = 253,
    AKEYCODE_CHANNEL_RETURN             = 254,
    AKEYCODE_SLEEP                      = 255,
    AKEYCODE_EPG                        = 256,
    AKEYCODE_LIST                       = 257,
    AKEYCODE_SUBTITLE                   = 258,
    AKEYCODE_FAVORITE                   = 259,
    AKEYCODE_MTS                        = 260,
    AKEYCODE_FREEZE                     = 261,
    AKEYCODE_TTX                        = 262,
    AKEYCODE_CC                         = 263,
    AKEYCODE_TV_SETTING                 = 264,
    AKEYCODE_SCREENSHOT                 = 265,
    AKEYCODE_CLOUD                      = 266,
    AKEYCODE_VOICE                      = 267,
    AKEYCODE_USB                        = 268,
    AKEYCODE_HDMI                       = 269,
    AKEYCODE_DISPLAY_MODE               = 270,
    AKEYCODE_SONG_SYSTEM                = 271,
    AKEYCODE_GINGA_BACK                 = 272,
    AKEYCODE_NETFLIX                    = 273,
    AKEYCODE_AMAZONE                    = 274,
    // Mstar section, range 301-400
    AKEYCODE_MSTAR_BALANCE              = 301,
    AKEYCODE_MSTAR_INDEX                = 302,
    AKEYCODE_MSTAR_HOLD                 = 303,
    AKEYCODE_MSTAR_UPDATE               = 304,
    AKEYCODE_MSTAR_REVEAL               = 305,
    AKEYCODE_MSTAR_SUBCODE              = 306,
    AKEYCODE_MSTAR_SIZE                 = 307,
    AKEYCODE_MSTAR_CLOCK                = 308,
    AKEYCODE_MSTAR_STORE_UP             = 309,
    AKEYCODE_MSTAR_TRIANGLE_UP          = 310,
    AKEYCODE_MSTAR_MOVIE                = 311,
    AKEYCODE_MSTAR_FILE                 = 312,
    AKEYCODE_MSTAR_STAR_PLUS            = 313,
    AKEYCODE_MSTAR_AUDIO_TRACK          = 314,
    AKEYCODE_MSTAR_OPTIONAL_TIME        = 315,
    AKEYCODE_MSTAR_LOOP                 = 316,
    AKEYCODE_MSTAR_INBOX                = 317,
    AKEYCODE_MSTAR_VVOIP                = 318,
    AKEYCODE_MSTAR_PVR_BROWSER          = 319,
    // Konka section, range 501-600
    AKEYCODE_KONKA_YPBPR                = 501,
    AKEYCODE_KONKA_THREEPOINT_LOONPRESS = 502,
    AKEYCODE_KONKA_THREEPOINT_COLLECT   = 503,
    AKEYCODE_KONKA_THREEPOINT_DISPERSE  = 504,
    AKEYCODE_KONKA_VOICESWITCH          = 505,
    AKEYCODE_KONKA_FLYIMEFINGER_SELECT  = 506,
    AKEYCODE_KONKA_FLYIMEFINGER_CANCEL  = 507,
    AKEYCODE_KONKA_SOUNDOUTPUT_ENABLE   = 508,
    AKEYCODE_KONKA_SOUNDOUTPUT_DISABLE  = 509,
    AKEYCODE_KONKA_BESTV_EXIT           = 510,
    AKEYCODE_KONKA_BESTV_FORWARD        = 511,
    AKEYCODE_KONKA_BESTV_BACKWARD       = 512,
    AKEYCODE_KONKA_ENTER_FACTORY        = 513,
    AKEYCODE_KONKA_FACTORY_BAKE_TV      = 514,
    // Haier section, range  401-500
    AKEYCODE_HAIER_TASK                 = 401,
    AKEYCODE_HAIER_TOOLS                = 402,
    AKEYCODE_HAIER_POWERSLEEP           = 403,
    AKEYCODE_HAIER_WAKEUP               = 404,
    AKEYCODE_HAIER_UNMUTE               = 405,
    AKEYCODE_HAIER_CLEANSEARCH          = 406,
    // Skyworth section, range 601-700

    // Tcl section, range 4001-4100
    AKEYCODE_TCL_MITV                   = 4001,
    AKEYCODE_TCL_USB_MENU               = 4002,
    AKEYCODE_TCL_SWING_R1               = 4003,
    AKEYCODE_TCL_SWING_R2               = 4004,
    AKEYCODE_TCL_SWING_R3               = 4005,
    AKEYCODE_TCL_SWING_R4               = 4006,
    AKEYCODE_TCL_SWING_L1               = 4007,
    AKEYCODE_TCL_SWING_L2               = 4008,
    AKEYCODE_TCL_SWING_L3               = 4009,
    AKEYCODE_TCL_SWING_L4               = 4010,
    AKEYCODE_TCL_WIDGET                 = 4011,
    AKEYCODE_TCL_VGR_LEFT               = 4012,
    AKEYCODE_TCL_VGR_RIGHT              = 4013,
    AKEYCODE_TCL_VGR_TAP                = 4014,
    AKEYCODE_TCL_VGR_WAVE               = 4015,
    AKEYCODE_TCL_VGR_WAVE_LEFT          = 4016,
    AKEYCODE_TCL_VGR_WAVE_RIGHT         = 4017,
    AKEYCODE_TCL_VGR_ACTIVE             = 4018,
    AKEYCODE_TCL_VGR_DEACTIVE           = 4019,
    AKEYCODE_TCL_BODY_SENSOR            = 4020,
    AKEYCODE_TCL_CIRCLE_CLOCKWISE       = 4021,
    AKEYCODE_TCL_CIRCLE_CTR_CLOCKWISE   = 4022,
    AKEYCODE_TCL_GESTURE_X              = 4023,
    AKEYCODE_TCL_GESTURE_ALPHA          = 4024,
    AKEYCODE_TCL_GESTURE_MUTE           = 4025,
    AKEYCODE_TCL_UP                     = 4026,
    AKEYCODE_TCL_DOWN                   = 4027,
    AKEYCODE_TCL_LEFT                   = 4028,
    AKEYCODE_TCL_RIGHT                  = 4029,
    AKEYCODE_TCL_UP_LEFT                = 4030,
    AKEYCODE_TCL_UP_RIGHT               = 4031,
    AKEYCODE_TCL_DOWN_LEFT              = 4032,
    AKEYCODE_TCL_DOWN_RIGHT             = 4033,
    // Changhong section, range 4101-4200
    AKEYCODE_CHANGHONGIR_MUTE           = 4101,
    AKEYCODE_CHANGHONGIR_INPUT          = 4102,
    AKEYCODE_CHANGHONGIR_DEL            = 4103,
    AKEYCODE_CHANGHONGIR_MENU           = 4104,
    AKEYCODE_CHANGHONGIR_CORN           = 4105,
    AKEYCODE_CHANGHONGIR_OK             = 4106,
    AKEYCODE_CHANGHONGIR_FLCK_FU        = 4107,
    AKEYCODE_CHANGHONGIR_FLCK_FD        = 4108,
    AKEYCODE_CHANGHONGIR_FLCK_FL        = 4109,
    AKEYCODE_CHANGHONGIR_FLCK_FR        = 4110,
    AKEYCODE_CHANGHONGIR_FLCK_SU        = 4111,
    AKEYCODE_CHANGHONGIR_FLCK_SD        = 4112,
    AKEYCODE_CHANGHONGIR_FLCK_SL        = 4113,
    AKEYCODE_CHANGHONGIR_FLCK_SR        = 4114,
    AKEYCODE_CHANGHONGIR_PINCH          = 4115,
    AKEYCODE_CHANGHONGIR_SPREAD         = 4116,
    AKEYCODE_CHANGHONGIR_VOICE          = 4117,
    AKEYCODE_CHANGHONGIR_HAND           = 4118,
    AKEYCODE_CHANGHONGIR_3D             = 4119,
    AKEYCODE_CHANGHONGIR_HELP           = 4120,
    AKEYCODE_CHANGHONGIR_APP            = 4121,
    AKEYCODE_CHANGHONGIR_MOUSE          = 4122,
    AKEYCODE_CHANGHONGIR_EPG            = 4123,
    AKEYCODE_CHANGHONGIR_HOME           = 4124,
    AKEYCODE_CHANGHONGIR_SETTINGS       = 4125,
    // Hisense section, range 4201-4300
    AKEYCODE_HISENSE_G_SENSOR           = 4201,
    AKEYCODE_HISENSE_LOW_BATTERY        = 4202,
    AKEYCODE_HISENSE_SLIDEUP            = 4203,
    AKEYCODE_HISENSE_SLIDEDOWN          = 4204,
    AKEYCODE_HISENSE_SLIDELEFT          = 4205,
    AKEYCODE_HISENSE_SLIDERIGHT         = 4206,
    AKEYCODE_HISENSE_RAPID_SLIDEUP      = 4207,
    AKEYCODE_HISENSE_RAPID_SLIDEDOWN    = 4208,
    AKEYCODE_HISENSE_RAPID_SLIDELEFT    = 4209,
    AKEYCODE_HISENSE_RAPID_SLIDERIGHT   = 4210,
    AKEYCODE_HISENSE_FAC_NEC_M          = 4211,
    AKEYCODE_HISENSE_FAC_NEC_IP         = 4212,
    AKEYCODE_HISENSE_FAC_NEC_SAVE       = 4213,
    AKEYCODE_HISENSE_FAC_NEC_3D         = 4214,
    AKEYCODE_HISENSE_FAC_NEC_PC         = 4215,
    AKEYCODE_HISENSE_FAC_NEC_LOGO       = 4216,
    AKEYCODE_HISENSE_FAC_NEC_YPBPR      = 4217,
    AKEYCODE_HISENSE_FAC_NEC_HDMI       = 4218,
    AKEYCODE_HISENSE_FAC_NEC_F1         = 4219,
    AKEYCODE_HISENSE_FAC_NEC_F2         = 4220,
    AKEYCODE_HISENSE_FAC_NEC_F3         = 4221,
    AKEYCODE_HISENSE_FAC_NEC_F4         = 4222,
    AKEYCODE_HISENSE_FAC_NEC_F5         = 4223,
    AKEYCODE_HISENSE_FAC_NEC_F6         = 4224,
    AKEYCODE_HISENSE_FAC_NEC_F7         = 4225,
    AKEYCODE_HISENSE_FAC_NEC_OK         = 4226,
    AKEYCODE_HISENSE_FAC_NEC_MAC        = 4227,
    AKEYCODE_HISENSE_FAC_NEC_AV         = 4228,
    AKEYCODE_HISENSE_FAC_NEC_PATTERN    = 4229,
    AKEYCODE_HISENSE_FAC_NEC_AGING      = 4230,
    AKEYCODE_HISENSE_FAC_NEC_BALANCE    = 4231,
    AKEYCODE_HISENSE_FAC_NEC_ADC        = 4232,
    AKEYCODE_HISENSE_FAC_NEC_RDRV_INCREASE = 4233,
    AKEYCODE_HISENSE_FAC_NEC_RDRV_DECREASE = 4234,
    AKEYCODE_HISENSE_FAC_NEC_GDRV_INCREASE = 4235,
    AKEYCODE_HISENSE_FAC_NEC_GDRV_DECREASE = 4236,
    AKEYCODE_HISENSE_FAC_NEC_BDRV_INCREASE = 4237,
    AKEYCODE_HISENSE_FAC_NEC_BDRV_DECREASE = 4238,
    AKEYCODE_HISENSE_FAC_NEC_RCUT_INCREASE = 4239,
    AKEYCODE_HISENSE_FAC_NEC_RCUT_DECREASE = 4240,
    AKEYCODE_HISENSE_FAC_NEC_GCUT_INCREASE = 4241,
    AKEYCODE_HISENSE_FAC_NEC_GCUT_DECREASE = 4242,
    AKEYCODE_HISENSE_FAC_NEC_BCUT_INCREASE = 4243,
    AKEYCODE_HISENSE_FAC_NEC_BCUT_DECREASE = 4244,
    AKEYCODE_HISENSE_PRODUCT_SCAN_START = 4245,
    AKEYCODE_HISENSE_PRODUCT_SCAN_OVER  = 4246,
    AKEYCODE_HISENSE_TEST_BROAD_TV      = 4247,
    AKEYCODE_HISENSE_TEST_BROAD_DTV     = 4248,
    AKEYCODE_HISENSE_TEST_BROAD_AV1     = 4249,
    AKEYCODE_HISENSE_TEST_BROAD_AV2     = 4250,
    AKEYCODE_HISENSE_TEST_BROAD_AV3     = 4251,
    AKEYCODE_HISENSE_TEST_BROAD_SVIDEO1 = 4252,
    AKEYCODE_HISENSE_TEST_BROAD_SVIDEO2 = 4253,
    AKEYCODE_HISENSE_TEST_BROAD_SVIDEO3 = 4254,
    AKEYCODE_HISENSE_TEST_BROAD_SCART1  = 4255,
    AKEYCODE_HISENSE_TEST_BROAD_SCART2  = 4256,
    AKEYCODE_HISENSE_TEST_BROAD_SCART3  = 4257,
    AKEYCODE_HISENSE_TEST_BOARD_YPBPR1  = 4258,
    AKEYCODE_HISENSE_TEST_BOARD_YPBPR2  = 4259,
    AKEYCODE_HISENSE_TEST_BOARD_YPBPR3  = 4260,
    AKEYCODE_HISENSE_TEST_BOARD_VGA     = 4261,
    AKEYCODE_HISENSE_TEST_BOARD_HDMI1   = 4262,
    AKEYCODE_HISENSE_TEST_BOARD_HDMI2   = 4263,
    AKEYCODE_HISENSE_TEST_BOARD_HDMI3   = 4264,
    AKEYCODE_HISENSE_TEST_BOARD_HDMI4   = 4265,
    AKEYCODE_HISENSE_TEST_BOARD_HDMI5   = 4266,
    AKEYCODE_HISENSE_TEST_BOARD_DMP     = 4267,
    AKEYCODE_HISENSE_TEST_BOARD_EMP     = 4268,
    AKEYCODE_HISENSE_TEST_BOARD_AUTOCOLOR = 4269,
    AKEYCODE_HISENSE_TEST_BOARD_SAVE    = 4270,
    AKEYCODE_HISENSE_TEST_BOARD_TELITEXT = 4271,
    AKEYCODE_HISENSE_TEST_BOARD_SAPL    = 4272,
    AKEYCODE_HISENSE_TEST_BOARD_VCHIP   = 4273,
    AKEYCODE_HISENSE_TEST_BOARD_CCD     = 4274,
    AKEYCODE_HISENSE_TEST_BOARD_BTSC    = 4275,
    AKEYCODE_HISENSE_TEST_BOARD_FAC_OK  = 4276,
    // MStar Android Patch End

    // NOTE: If you add a new keycode here you must also add it to several other files.
    //       Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.
};

#ifdef __cplusplus
}
#endif

#endif // _ANDROID_KEYCODES_H

     4)在frameworks/base/core/res/res/values/attrs.xml添加如下
         

     5)在 frameworks/base/core/java/android/view/KeyEvent.java添加对应的

        public static final int KEYCODE_WLS = 320;

     经过如上的步骤就将"123"按键和Android系统中的KEYCODE_WLS就对应起来了，注意这里的"123“键值并不是真正意义上的123键值，他只是linux驱动向上层抛出的键值。

     6)在Android的framework层的键值处理函数中，捕获按键，并进行相应处理。
在framework层的input系统中，加入对wifi按键的捕获。
添加的文件是：frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
添加的具体方法：在PhoneWindowManager.java的interceptKeyBeforeQueueing()函数中,不惑该键值，至于怎么处理处决您的业务处理了。

       在这里再总结下我对Android键值处理的理解，我的理解：看了一下key character map的处理，是通过读取kl文件然后使用驱动程序提供的ioctl函数去修改来自输入设备的扫描码和系统预定义的keycode的映射关系。 这样的话，对于硬件扫描码，只需要修改这个kl文件。上层得到的都是系统预定义的keycode。
重要补充：
　　映射关系：

    ir硬件扫描码在驱动里面被 映射为 kernel/include/linux/input.h里面定义的某个键值。但是这个键值只在linux系统中使用。
　　Android通过源码目录下的device/xxx/xxx.kl( keylayout )文件完成linux键值到Android系统要使用的键值的映射 


原文：http://blog.csdn.net/tkwxty/article/details/43338921