android BT 遥控器配置

所有遥控器的配置文件都是基于 google 的 Generic.kl （frameworks\base\data\keyboards）做的
修改，BT 也不例外。BT 的配置按照如下步骤（所有下面的配置都已 HOME 键为例，其他
的类似）：
1，获取 vendor id 和 product id
系统起来敲入：dumpsys input

dumpsys  input                                    
INPUT MANAGER (dumpsys input)

Event Hub State:
  BuiltInKeyboardId: -2
  Devices:
    -1: Virtual
      Classes: 0x40000023
      Path: <virtual>
      Descriptor: a718a782d34bc767f4689c232d64d527998ea7fd
      Location: 
      ControllerNumber: 0
      UniqueId: <virtual>
      Identifier: bus=0x0000, vendor=0x0000, product=0x0000, version=0x0000
      KeyLayoutFile: /system/usr/keylayout/Generic.kl
      KeyCharacterMapFile: /system/usr/keychars/Virtual.kcm
      ConfigurationFile: 
      HaveKeyboardLayoutOverlay: false
    1: mtk-kpd
      Classes: 0x00000001
      Path: /dev/input/event2
      Descriptor: f0d2e427e7a05eb6d316f5e14800c5ac7b6aee79
      Location: 
      ControllerNumber: 0
      UniqueId: 
      Identifier: bus=0x0019, vendor=0x2454, product=0x6500, version=0x0010
      KeyLayoutFile: /system/usr/keylayout/mtk-kpd.kl
      KeyCharacterMapFile: /system/usr/keychars/Generic.kcm
      ConfigurationFile: 
      HaveKeyboardLayoutOverlay: false
    2: ACCDET
      Classes: 0x00000001
      Path: /dev/input/event3
      Descriptor: 1c78f7e0d16d4dbc8d3ab93943523f379203f90b
      Location: 
      ControllerNumber: 0
      UniqueId: 
      Identifier: bus=0x0019, vendor=0x0000, product=0x0000, version=0x0000
      KeyLayoutFile: /system/usr/keylayout/ACCDET.kl
      KeyCharacterMapFile: /system/usr/keychars/Generic.kcm
      ConfigurationFile: 
      HaveKeyboardLayoutOverlay: false
    3: NEC_Remote_Controller_Mouse
      Classes: 0x00000008
      Path: /dev/input/event1
      Descriptor: 9208b38663027d7d72cdff95baf104571adb6880
      Location: 
      ControllerNumber: 0
      UniqueId: 
      Identifier: bus=0x0019, vendor=0x000c, product=0x000c, version=0x000c
      KeyLayoutFile: 
      KeyCharacterMapFile: 
      ConfigurationFile: 
      HaveKeyboardLayoutOverlay: false
    4: NEC_Remote_Controller
      Classes: 0x00000001
      Path: /dev/input/event0
      Descriptor: d1344eb5e730be322c5338ae3961c67f6c68dc52
      Location: 
      ControllerNumber: 0
      UniqueId: 
      Identifier: bus=0x0019, vendor=0x000b, product=0x000b, version=0x000b
      KeyLayoutFile: /system/usr/keylayout/Generic.kl
      KeyCharacterMapFile: /system/usr/keychars/Generic.kcm
      ConfigurationFile: 
      HaveKeyboardLayoutOverlay: false

2，将 Generic.kl 重新命名为：Vendor_0a5c_Product_4502.kl；系统起来后根据 vendor id 和
product id 来识别对应的配置文件；
3，将 Vendor_0a5c_Product_4502.kl 拷贝到系统的/system/usr/keylayout/下，重启（reboot）
4，系统起来后 dumpsys input 查看系统是否是用你的配置文件即对应 keylayoutfile；
5，在#4 的基础上，串口输入 getevent，按遥控器的按键来获取键值，我们获取到的 scancode
是 0x66（注意：这里获取到的是 hex）
Vendor_0a5c_Product_4502.kl 部分 配置文件如下

key 100   ALT_RIGHT
# key 101 "KEY_LINEFEED"
key 102   HOME
key 103   DPAD_UP
key 104   PAGE_UP
key 105   DPAD_LEFT
key 106   DPAD_RIGHT
key 107   MOVE_END
key 108   DPAD_DOWN
key 109   PAGE_DOWN
key 110   INSERT
key 111   FORWARD_DEL
# key 112 "KEY_MACRO"
key 113   VOLUME_MUTE
key 114   VOLUME_DOWN
key 115   VOLUME_UP
key 116   POWER             WAKE
key 117   NUMPAD_EQUALS
# key 118 "KEY_KPPLUSMINUS"
key 119   BREAK
# key 120 (undefined)
key 121   NUMPAD_COMMA
key 122   KANA
key 123   EISU
key 124   YEN
key 125   META_LEFT
key 126   META_RIGHT
key 127   MENU              WAKE_DROPPED
key 128   MEDIA_STOP
# key 129 "KEY_AGAIN"
# key 130 "KEY_PROPS"
# key 131 "KEY_UNDO"
# key 132 "KEY_FRONT"
# key 133 "KEY_COPY"
# key 134 "KEY_OPEN"
# key 135 "KEY_PASTE"
# key 136 "KEY_FIND"
# key 137 "KEY_CUT"
# key 138 "KEY_HELP"
key 139   MENU              WAKE_DROPPED
key 140   CALCULATOR
# key 141 "KEY_SETUP"
key 142   POWER             WAKE
key 143   POWER             WAKE
# key 144 "KEY_FILE"
# key 145 "KEY_SENDFILE"
# key 146 "KEY_DELETEFILE"
# key 147 "KEY_XFER"
# key 148 "KEY_PROG1"
# key 149 "KEY_PROG2"
key 150   EXPLORER
# key 151 "KEY_MSDOS"
key 152   POWER             WAKE
# key 153 "KEY_DIRECTION"
# key 154 "KEY_CYCLEWINDOWS"
key 155   ENVELOPE
key 156   BOOKMARK

将 0x73 转换成十进制即：115 即 key 115 VOLUME_UP

8，查看你的配置是否正确，出口输入 getevent -l

  name:     "NEC_Remote_Controller"
/dev/input/event0: EV_KEY       KEY_VOLUMEUP         DOWN                
/dev/input/event0: EV_SYN       SYN_REPORT           00000000            
/dev/input/event0: EV_KEY       KEY_VOLUMEUP         UP                  
/dev/input/event0: EV_SYN       SYN_REPORT           00000000