Android按键适配

底层服务于应用,在应用层我们可以轻易的获取到一个按键按下事件,列如:

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        Log.e("foxlog", "onKeyDown:" + keyCode);
        return super.onKeyDown(keyCode, event);
    }
}

文章的核心不是赘述按键事件的分发,所以不打算分析事件分发相关流程,而是假设按键键值错误,以这个问题为方向进行学习研究。我们可以在logcat中轻易的打印出应用层获得的键值。Android的设定是Linux驱动上报事件,再由/system/usr/keylayout下的kl文件进行转换,转换成应用层得到的数值。
我们先使用geteven命令并且按下任意按键来获取按键值:

root@Hi3798MV100:/ # getevent
could not get driver version for /dev/input/mouse1, Not a typewriter
...
add device 3: /dev/input/event0
  name:     "Hi keyboard"
could not get driver version for /dev/input/mice, Not a typewriter
/dev/input/event0: 0001 006c 00000001
/dev/input/event0: 0000 0000 00000000
/dev/input/event0: 0001 006c 00000000
/dev/input/event0: 0000 0000 00000000

我们得到了/dev/input/event0: 0001 006c 00000001这类信息,/dev/input/event0为设备,后面紧跟的是type,code,value
我们得到code以后该值为16进制值转换成十进制为"108"
我们再来确定一下当前设备使用的是哪一个kl文件

cat /proc/bus/input/devices
130|Hi3798MV200:/ # cat /proc/bus/input/devices
I: Bus=0000 Vendor=0001 Product=0001 Version=0100
N: Name="Hi keyboard"
P: Phys=
S: Sysfs=/dev/input/event0
U: Uniq=
H: Handlers=rfkill kbd event0 cpufreq_interactive
B: PROP=0
B: EV=3
B: KEY=...

我们会得到input0的上述关键信息"Bus=0000 Vendor=0001 Product=0001 Version=0100"。在/system/usr/keylayout目录查看一下文件列表

Hi3798MV200:/system/usr/keylayout # ls
Vendor_0001_Product_0001.kl
Generic.kl

系统会通过Vendor和Product的值进行匹配如果没有匹配到则使用Generic.kl
我们cat一下与之匹配的kl文件

Hi3798MV200:/system/usr/keylayout # cat Vendor_0001_Product_0001.kl
...
key 108   DPAD_DOWN
...

与之对应我们得到了DPAD_DOWN按键按下的事件,如果我们只是简单的改键我们在匹配到的按键常量进行替换即可列如将上面的"DPAD_DOWN"修改为”DPAD_UP“我们就完成可一次按键的适配

另外我们可以参考以下常量进行按键替换

package top.foxhome.top.adbutil;

public class KeyEvent {
    /**
     * Key code constant: Unknown key code.
     */
    public static final int KEYCODE_UNKNOWN = 0;
    /**
     * Key code constant: Soft Left key.
     * Usually situated below the display on phones and used as a multi-function
     * feature key for selecting a software defined function shown on the bottom left
     * of the display.
     */
    public static final int KEYCODE_SOFT_LEFT = 1;
    /**
     * Key code constant: Soft Right key.
     * Usually situated below the display on phones and used as a multi-function
     * feature key for selecting a software defined function shown on the bottom right
     * of the display.
     */
    public static final int KEYCODE_SOFT_RIGHT = 2;
    /**
     * Key code constant: Home key.
     * This key is handled by the framework and is never delivered to applications.
     */
    public static final int KEYCODE_HOME = 3;
    /**
     * Key code constant: Back key.
     */
    public static final int KEYCODE_BACK = 4;
    /**
     * Key code constant: Call key.
     */
    public static final int KEYCODE_CALL = 5;
    /**
     * Key code constant: End Call key.
     */
    public static final int KEYCODE_ENDCALL = 6;
    /**
     * Key code constant: '0' key.
     */
    public static final int KEYCODE_0 = 7;
    /**
     * Key code constant: '1' key.
     */
    public static final int KEYCODE_1 = 8;
    /**
     * Key code constant: '2' key.
     */
    public static final int KEYCODE_2 = 9;
    /**
     * Key code constant: '3' key.
     */
    public static final int KEYCODE_3 = 10;
    /**
     * Key code constant: '4' key.
     */
    public static final int KEYCODE_4 = 11;
    /**
     * Key code constant: '5' key.
     */
    public static final int KEYCODE_5 = 12;
    /**
     * Key code constant: '6' key.
     */
    public static final int KEYCODE_6 = 13;
    /**
     * Key code constant: '7' key.
     */
    public static final int KEYCODE_7 = 14;
    /**
     * Key code constant: '8' key.
     */
    public static final int KEYCODE_8 = 15;
    /**
     * Key code constant: '9' key.
     */
    public static final int KEYCODE_9 = 16;
    /**
     * Key code constant: '*' key.
     */
    public static final int KEYCODE_STAR = 17;
    /**
     * Key code constant: '#' key.
     */
    public static final int KEYCODE_POUND = 18;
    /**
     * Key code constant: Directional Pad Up key.
     * May also be synthesized from trackball motions.
     */
    public static final int KEYCODE_DPAD_UP = 19;
    /**
     * Key code constant: Directional Pad Down key.
     * May also be synthesized from trackball motions.
     */
    public static final int KEYCODE_DPAD_DOWN = 20;
    /**
     * Key code constant: Directional Pad Left key.
     * May also be synthesized from trackball motions.
     */
    public static final int KEYCODE_DPAD_LEFT = 21;
    /**
     * Key code constant: Directional Pad Right key.
     * May also be synthesized from trackball motions.
     */
    public static final int KEYCODE_DPAD_RIGHT = 22;
    /**
     * Key code constant: Directional Pad Center key.
     * May also be synthesized from trackball motions.
     */
    public static final int KEYCODE_DPAD_CENTER = 23;
    /**
     * Key code constant: Volume Up key.
     * Adjusts the speaker volume up.
     */
    public static final int KEYCODE_VOLUME_UP = 24;
    /**
     * Key code constant: Volume Down key.
     * Adjusts the speaker volume down.
     */
    public static final int KEYCODE_VOLUME_DOWN = 25;
    /**
     * Key code constant: Power key.
     */
    public static final int KEYCODE_POWER = 26;
    /**
     * Key code constant: Camera key.
     * Used to launch a camera application or take pictures.
     */
    public static final int KEYCODE_CAMERA = 27;
    /**
     * Key code constant: Clear key.
     */
    public static final int KEYCODE_CLEAR = 28;
    /**
     * Key code constant: 'A' key.
     */
    public static final int KEYCODE_A = 29;
    /**
     * Key code constant: 'B' key.
     */
    public static final int KEYCODE_B = 30;
    /**
     * Key code constant: 'C' key.
     */
    public static final int KEYCODE_C = 31;
    /**
     * Key code constant: 'D' key.
     */
    public static final int KEYCODE_D = 32;
    /**
     * Key code constant: 'E' key.
     */
    public static final int KEYCODE_E = 33;
    /**
     * Key code constant: 'F' key.
     */
    public static final int KEYCODE_F = 34;
    /**
     * Key code constant: 'G' key.
     */
    public static final int KEYCODE_G = 35;
    /**
     * Key code constant: 'H' key.
     */
    public static final int KEYCODE_H = 36;
    /**
     * Key code constant: 'I' key.
     */
    public static final int KEYCODE_I = 37;
    /**
     * Key code constant: 'J' key.
     */
    public static final int KEYCODE_J = 38;
    /**
     * Key code constant: 'K' key.
     */
    public static final int KEYCODE_K = 39;
    /**
     * Key code constant: 'L' key.
     */
    public static final int KEYCODE_L = 40;
    /**
     * Key code constant: 'M' key.
     */
    public static final int KEYCODE_M = 41;
    /**
     * Key code constant: 'N' key.
     */
    public static final int KEYCODE_N = 42;
    /**
     * Key code constant: 'O' key.
     */
    public static final int KEYCODE_O = 43;
    /**
     * Key code constant: 'P' key.
     */
    public static final int KEYCODE_P = 44;
    /**
     * Key code constant: 'Q' key.
     */
    public static final int KEYCODE_Q = 45;
    /**
     * Key code constant: 'R' key.
     */
    public static final int KEYCODE_R = 46;
    /**
     * Key code constant: 'S' key.
     */
    public static final int KEYCODE_S = 47;
    /**
     * Key code constant: 'T' key.
     */
    public static final int KEYCODE_T = 48;
    /**
     * Key code constant: 'U' key.
     */
    public static final int KEYCODE_U = 49;
    /**
     * Key code constant: 'V' key.
     */
    public static final int KEYCODE_V = 50;
    /**
     * Key code constant: 'W' key.
     */
    public static final int KEYCODE_W = 51;
    /**
     * Key code constant: 'X' key.
     */
    public static final int KEYCODE_X = 52;
    /**
     * Key code constant: 'Y' key.
     */
    public static final int KEYCODE_Y = 53;
    /**
     * Key code constant: 'Z' key.
     */
    public static final int KEYCODE_Z = 54;
    /**
     * Key code constant: ',' key.
     */
    public static final int KEYCODE_COMMA = 55;
    /**
     * Key code constant: '.' key.
     */
    public static final int KEYCODE_PERIOD = 56;
    /**
     * Key code constant: Left Alt modifier key.
     */
    public static final int KEYCODE_ALT_LEFT = 57;
    /**
     * Key code constant: Right Alt modifier key.
     */
    public static final int KEYCODE_ALT_RIGHT = 58;
    /**
     * Key code constant: Left Shift modifier key.
     */
    public static final int KEYCODE_SHIFT_LEFT = 59;
    /**
     * Key code constant: Right Shift modifier key.
     */
    public static final int KEYCODE_SHIFT_RIGHT = 60;
    /**
     * Key code constant: Tab key.
     */
    public static final int KEYCODE_TAB = 61;
    /**
     * Key code constant: Space key.
     */
    public static final int KEYCODE_SPACE = 62;
    /**
     * Key code constant: Symbol modifier key.
     * Used to enter alternate symbols.
     */
    public static final int KEYCODE_SYM = 63;
    /**
     * Key code constant: Explorer special function key.
     * Used to launch a browser application.
     */
    public static final int KEYCODE_EXPLORER = 64;
    /**
     * Key code constant: Envelope special function key.
     * Used to launch a mail application.
     */
    public static final int KEYCODE_ENVELOPE = 65;
    /**
     * Key code constant: Enter key.
     */
    public static final int KEYCODE_ENTER = 66;
    /**
     * Key code constant: Backspace key.
     * Deletes characters before the insertion point, unlike {@link #KEYCODE_FORWARD_DEL}.
     */
    public static final int KEYCODE_DEL = 67;
    /**
     * Key code constant: '`' (backtick) key.
     */
    public static final int KEYCODE_GRAVE = 68;
    /**
     * Key code constant: '-'.
     */
    public static final int KEYCODE_MINUS = 69;
    /**
     * Key code constant: '=' key.
     */
    public static final int KEYCODE_EQUALS = 70;
    /**
     * Key code constant: '[' key.
     */
    public static final int KEYCODE_LEFT_BRACKET = 71;
    /**
     * Key code constant: ']' key.
     */
    public static final int KEYCODE_RIGHT_BRACKET = 72;
    /**
     * Key code constant: '\' key.
     */
    public static final int KEYCODE_BACKSLASH = 73;
    /**
     * Key code constant: ';' key.
     */
    public static final int KEYCODE_SEMICOLON = 74;
    /**
     * Key code constant: ''' (apostrophe) key.
     */
    public static final int KEYCODE_APOSTROPHE = 75;
    /**
     * Key code constant: '/' key.
     */
    public static final int KEYCODE_SLASH = 76;
    /**
     * Key code constant: '@' key.
     */
    public static final int KEYCODE_AT = 77;
    /**
     * Key code constant: Number modifier key.
     * Used to enter numeric symbols.
     * This key is not Num Lock; it is more like {@link #KEYCODE_ALT_LEFT} and is
     */
    public static final int KEYCODE_NUM = 78;
    /**
     * Key code constant: Headset Hook key.
     * Used to hang up calls and stop media.
     */
    public static final int KEYCODE_HEADSETHOOK = 79;
    /**
     * Key code constant: Camera Focus key.
     * Used to focus the camera.
     */
    public static final int KEYCODE_FOCUS = 80;   // *Camera* focus
    /**
     * Key code constant: '+' key.
     */
    public static final int KEYCODE_PLUS = 81;
    /**
     * Key code constant: Menu key.
     */
    public static final int KEYCODE_MENU = 82;
    /**
     * Key code constant: Notification key.
     */
    public static final int KEYCODE_NOTIFICATION = 83;
    /**
     * Key code constant: Search key.
     */
    public static final int KEYCODE_SEARCH = 84;
    /**
     * Key code constant: Play/Pause media key.
     */
    public static final int KEYCODE_MEDIA_PLAY_PAUSE = 85;
    /**
     * Key code constant: Stop media key.
     */
    public static final int KEYCODE_MEDIA_STOP = 86;
    /**
     * Key code constant: Play Next media key.
     */
    public static final int KEYCODE_MEDIA_NEXT = 87;
    /**
     * Key code constant: Play Previous media key.
     */
    public static final int KEYCODE_MEDIA_PREVIOUS = 88;
    /**
     * Key code constant: Rewind media key.
     */
    public static final int KEYCODE_MEDIA_REWIND = 89;
    /**
     * Key code constant: Fast Forward media key.
     */
    public static final int KEYCODE_MEDIA_FAST_FORWARD = 90;
    /**
     * Key code constant: Mute key.
     * Mutes the microphone, unlike {@link #KEYCODE_VOLUME_MUTE}.
     */
    public static final int KEYCODE_MUTE = 91;
    /**
     * Key code constant: Page Up key.
     */
    public static final int KEYCODE_PAGE_UP = 92;
    /**
     * Key code constant: Page Down key.
     */
    public static final int KEYCODE_PAGE_DOWN = 93;
    /**
     * Key code constant: Picture Symbols modifier key.
     * Used to switch symbol sets (Emoji, Kao-moji).
     */
    public static final int KEYCODE_PICTSYMBOLS = 94;   // switch symbol-sets (Emoji,Kao-moji)
    /**
     * Key code constant: Switch Charset modifier key.
     * Used to switch character sets (Kanji, Katakana).
     */
    public static final int KEYCODE_SWITCH_CHARSET = 95;   // switch char-sets (Kanji,Katakana)
    /**
     * Key code constant: A Button key.
     * On a game controller, the A button should be either the button labeled A
     * or the first button on the bottom row of controller buttons.
     */
    public static final int KEYCODE_BUTTON_A = 96;
    /**
     * Key code constant: B Button key.
     * On a game controller, the B button should be either the button labeled B
     * or the second button on the bottom row of controller buttons.
     */
    public static final int KEYCODE_BUTTON_B = 97;
    /**
     * Key code constant: C Button key.
     * On a game controller, the C button should be either the button labeled C
     * or the third button on the bottom row of controller buttons.
     */
    public static final int KEYCODE_BUTTON_C = 98;
    /**
     * Key code constant: X Button key.
     * On a game controller, the X button should be either the button labeled X
     * or the first button on the upper row of controller buttons.
     */
    public static final int KEYCODE_BUTTON_X = 99;
    /**
     * Key code constant: Y Button key.
     * On a game controller, the Y button should be either the button labeled Y
     * or the second button on the upper row of controller buttons.
     */
    public static final int KEYCODE_BUTTON_Y = 100;
    /**
     * Key code constant: Z Button key.
     * On a game controller, the Z button should be either the button labeled Z
     * or the third button on the upper row of controller buttons.
     */
    public static final int KEYCODE_BUTTON_Z = 101;
    /**
     * Key code constant: L1 Button key.
     * On a game controller, the L1 button should be either the button labeled L1 (or L)
     * or the top left trigger button.
     */
    public static final int KEYCODE_BUTTON_L1 = 102;
    /**
     * Key code constant: R1 Button key.
     * On a game controller, the R1 button should be either the button labeled R1 (or R)
     * or the top right trigger button.
     */
    public static final int KEYCODE_BUTTON_R1 = 103;
    /**
     * Key code constant: L2 Button key.
     * On a game controller, the L2 button should be either the button labeled L2
     * or the bottom left trigger button.
     */
    public static final int KEYCODE_BUTTON_L2 = 104;
    /**
     * Key code constant: R2 Button key.
     * On a game controller, the R2 button should be either the button labeled R2
     * or the bottom right trigger button.
     */
    public static final int KEYCODE_BUTTON_R2 = 105;
    /**
     * Key code constant: Left Thumb Button key.
     * On a game controller, the left thumb button indicates that the left (or only)
     * joystick is pressed.
     */
    public static final int KEYCODE_BUTTON_THUMBL = 106;
    /**
     * Key code constant: Right Thumb Button key.
     * On a game controller, the right thumb button indicates that the right
     * joystick is pressed.
     */
    public static final int KEYCODE_BUTTON_THUMBR = 107;
    /**
     * Key code constant: Start Button key.
     * On a game controller, the button labeled Start.
     */
    public static final int KEYCODE_BUTTON_START = 108;
    /**
     * Key code constant: Select Button key.
     * On a game controller, the button labeled Select.
     */
    public static final int KEYCODE_BUTTON_SELECT = 109;
    /**
     * Key code constant: Mode Button key.
     * On a game controller, the button labeled Mode.
     */
    public static final int KEYCODE_BUTTON_MODE = 110;
    /**
     * Key code constant: Escape key.
     */
    public static final int KEYCODE_ESCAPE = 111;
    /**
     * Key code constant: Forward Delete key.
     * Deletes characters ahead of the insertion point, unlike {@link #KEYCODE_DEL}.
     */
    public static final int KEYCODE_FORWARD_DEL = 112;
    /**
     * Key code constant: Left Control modifier key.
     */
    public static final int KEYCODE_CTRL_LEFT = 113;
    /**
     * Key code constant: Right Control modifier key.
     */
    public static final int KEYCODE_CTRL_RIGHT = 114;
    /**
     * Key code constant: Caps Lock key.
     */
    public static final int KEYCODE_CAPS_LOCK = 115;
    /**
     * Key code constant: Scroll Lock key.
     */
    public static final int KEYCODE_SCROLL_LOCK = 116;
    /**
     * Key code constant: Left Meta modifier key.
     */
    public static final int KEYCODE_META_LEFT = 117;
    /**
     * Key code constant: Right Meta modifier key.
     */
    public static final int KEYCODE_META_RIGHT = 118;
    /**
     * Key code constant: Function modifier key.
     */
    public static final int KEYCODE_FUNCTION = 119;
    /**
     * Key code constant: System Request / Print Screen key.
     */
    public static final int KEYCODE_SYSRQ = 120;
    /**
     * Key code constant: Break / Pause key.
     */
    public static final int KEYCODE_BREAK = 121;
    /**
     * Key code constant: Home Movement key.
     * Used for scrolling or moving the cursor around to the start of a line
     * or to the top of a list.
     */
    public static final int KEYCODE_MOVE_HOME = 122;
    /**
     * Key code constant: End Movement key.
     * Used for scrolling or moving the cursor around to the end of a line
     * or to the bottom of a list.
     */
    public static final int KEYCODE_MOVE_END = 123;
    /**
     * Key code constant: Insert key.
     * Toggles insert / overwrite edit mode.
     */
    public static final int KEYCODE_INSERT = 124;
    /**
     * Key code constant: Forward key.
     * Navigates forward in the history stack.  Complement of {@link #KEYCODE_BACK}.
     */
    public static final int KEYCODE_FORWARD = 125;
    /**
     * Key code constant: Play media key.
     */
    public static final int KEYCODE_MEDIA_PLAY = 126;
    /**
     * Key code constant: Pause media key.
     */
    public static final int KEYCODE_MEDIA_PAUSE = 127;
    /**
     * Key code constant: Close media key.
     * May be used to close a CD tray, for example.
     */
    public static final int KEYCODE_MEDIA_CLOSE = 128;
    /**
     * Key code constant: Eject media key.
     * May be used to eject a CD tray, for example.
     */
    public static final int KEYCODE_MEDIA_EJECT = 129;
    /**
     * Key code constant: Record media key.
     */
    public static final int KEYCODE_MEDIA_RECORD = 130;
    /**
     * Key code constant: F1 key.
     */
    public static final int KEYCODE_F1 = 131;
    /**
     * Key code constant: F2 key.
     */
    public static final int KEYCODE_F2 = 132;
    /**
     * Key code constant: F3 key.
     */
    public static final int KEYCODE_F3 = 133;
    /**
     * Key code constant: F4 key.
     */
    public static final int KEYCODE_F4 = 134;
    /**
     * Key code constant: F5 key.
     */
    public static final int KEYCODE_F5 = 135;
    /**
     * Key code constant: F6 key.
     */
    public static final int KEYCODE_F6 = 136;
    /**
     * Key code constant: F7 key.
     */
    public static final int KEYCODE_F7 = 137;
    /**
     * Key code constant: F8 key.
     */
    public static final int KEYCODE_F8 = 138;
    /**
     * Key code constant: F9 key.
     */
    public static final int KEYCODE_F9 = 139;
    /**
     * Key code constant: F10 key.
     */
    public static final int KEYCODE_F10 = 140;
    /**
     * Key code constant: F11 key.
     */
    public static final int KEYCODE_F11 = 141;
    /**
     * Key code constant: F12 key.
     */
    public static final int KEYCODE_F12 = 142;
    /**
     * Key code constant: Num Lock key.
     * This is the Num Lock key; it is different from {@link #KEYCODE_NUM}.
     * This key alters the behavior of other keys on the numeric keypad.
     */
    public static final int KEYCODE_NUM_LOCK = 143;
    /**
     * Key code constant: Numeric keypad '0' key.
     */
    public static final int KEYCODE_NUMPAD_0 = 144;
    /**
     * Key code constant: Numeric keypad '1' key.
     */
    public static final int KEYCODE_NUMPAD_1 = 145;
    /**
     * Key code constant: Numeric keypad '2' key.
     */
    public static final int KEYCODE_NUMPAD_2 = 146;
    /**
     * Key code constant: Numeric keypad '3' key.
     */
    public static final int KEYCODE_NUMPAD_3 = 147;
    /**
     * Key code constant: Numeric keypad '4' key.
     */
    public static final int KEYCODE_NUMPAD_4 = 148;
    /**
     * Key code constant: Numeric keypad '5' key.
     */
    public static final int KEYCODE_NUMPAD_5 = 149;
    /**
     * Key code constant: Numeric keypad '6' key.
     */
    public static final int KEYCODE_NUMPAD_6 = 150;
    /**
     * Key code constant: Numeric keypad '7' key.
     */
    public static final int KEYCODE_NUMPAD_7 = 151;
    /**
     * Key code constant: Numeric keypad '8' key.
     */
    public static final int KEYCODE_NUMPAD_8 = 152;
    /**
     * Key code constant: Numeric keypad '9' key.
     */
    public static final int KEYCODE_NUMPAD_9 = 153;
    /**
     * Key code constant: Numeric keypad '/' key (for division).
     */
    public static final int KEYCODE_NUMPAD_DIVIDE = 154;
    /**
     * Key code constant: Numeric keypad '*' key (for multiplication).
     */
    public static final int KEYCODE_NUMPAD_MULTIPLY = 155;
    /**
     * Key code constant: Numeric keypad '-' key (for subtraction).
     */
    public static final int KEYCODE_NUMPAD_SUBTRACT = 156;
    /**
     * Key code constant: Numeric keypad '+' key (for addition).
     */
    public static final int KEYCODE_NUMPAD_ADD = 157;
    /**
     * Key code constant: Numeric keypad '.' key (for decimals or digit grouping).
     */
    public static final int KEYCODE_NUMPAD_DOT = 158;
    /**
     * Key code constant: Numeric keypad ',' key (for decimals or digit grouping).
     */
    public static final int KEYCODE_NUMPAD_COMMA = 159;
    /**
     * Key code constant: Numeric keypad Enter key.
     */
    public static final int KEYCODE_NUMPAD_ENTER = 160;
    /**
     * Key code constant: Numeric keypad '=' key.
     */
    public static final int KEYCODE_NUMPAD_EQUALS = 161;
    /**
     * Key code constant: Numeric keypad '(' key.
     */
    public static final int KEYCODE_NUMPAD_LEFT_PAREN = 162;
    /**
     * Key code constant: Numeric keypad ')' key.
     */
    public static final int KEYCODE_NUMPAD_RIGHT_PAREN = 163;
    /**
     * Key code constant: Volume Mute key.
     * Mutes the speaker, unlike {@link #KEYCODE_MUTE}.
     * This key should normally be implemented as a toggle such that the first press
     * mutes the speaker and the second press restores the original volume.
     */
    public static final int KEYCODE_VOLUME_MUTE = 164;
    /**
     * Key code constant: Info key.
     * Common on TV remotes to show additional information related to what is
     * currently being viewed.
     */
    public static final int KEYCODE_INFO = 165;
    /**
     * Key code constant: Channel up key.
     * On TV remotes, increments the television channel.
     */
    public static final int KEYCODE_CHANNEL_UP = 166;
    /**
     * Key code constant: Channel down key.
     * On TV remotes, decrements the television channel.
     */
    public static final int KEYCODE_CHANNEL_DOWN = 167;
    /**
     * Key code constant: Zoom in key.
     */
    public static final int KEYCODE_ZOOM_IN = 168;
    /**
     * Key code constant: Zoom out key.
     */
    public static final int KEYCODE_ZOOM_OUT = 169;
    /**
     * Key code constant: TV key.
     * On TV remotes, switches to viewing live TV.
     */
    public static final int KEYCODE_TV = 170;
    /**
     * Key code constant: Window key.
     * On TV remotes, toggles picture-in-picture mode or other windowing functions.
     */
    public static final int KEYCODE_WINDOW = 171;
    /**
     * Key code constant: Guide key.
     * On TV remotes, shows a programming guide.
     */
    public static final int KEYCODE_GUIDE = 172;
    /**
     * Key code constant: DVR key.
     * On some TV remotes, switches to a DVR mode for recorded shows.
     */
    public static final int KEYCODE_DVR = 173;
    /**
     * Key code constant: Bookmark key.
     * On some TV remotes, bookmarks content or web pages.
     */
    public static final int KEYCODE_BOOKMARK = 174;
    /**
     * Key code constant: Toggle captions key.
     * Switches the mode for closed-captioning text, for example during television shows.
     */
    public static final int KEYCODE_CAPTIONS = 175;
    /**
     * Key code constant: Settings key.
     * Starts the system settings activity.
     */
    public static final int KEYCODE_SETTINGS = 176;
    /**
     * Key code constant: TV power key.
     * On TV remotes, toggles the power on a television screen.
     */
    public static final int KEYCODE_TV_POWER = 177;
    /**
     * Key code constant: TV input key.
     * On TV remotes, switches the input on a television screen.
     */
    public static final int KEYCODE_TV_INPUT = 178;
    /**
     * Key code constant: Set-top-box power key.
     * On TV remotes, toggles the power on an external Set-top-box.
     */
    public static final int KEYCODE_STB_POWER = 179;
    /**
     * Key code constant: Set-top-box input key.
     * On TV remotes, switches the input mode on an external Set-top-box.
     */
    public static final int KEYCODE_STB_INPUT = 180;
    /**
     * Key code constant: A/V Receiver power key.
     * On TV remotes, toggles the power on an external A/V Receiver.
     */
    public static final int KEYCODE_AVR_POWER = 181;
    /**
     * Key code constant: A/V Receiver input key.
     * On TV remotes, switches the input mode on an external A/V Receiver.
     */
    public static final int KEYCODE_AVR_INPUT = 182;
    /**
     * Key code constant: Red "programmable" key.
     * On TV remotes, acts as a contextual/programmable key.
     */
    public static final int KEYCODE_PROG_RED = 183;
    /**
     * Key code constant: Green "programmable" key.
     * On TV remotes, actsas a contextual/programmable key.
     */
    public static final int KEYCODE_PROG_GREEN = 184;
    /**
     * Key code constant: Yellow "programmable" key.
     * On TV remotes, acts as a contextual/programmable key.
     */
    public static final int KEYCODE_PROG_YELLOW = 185;
    /**
     * Key code constant: Blue "programmable" key.
     * On TV remotes, acts as a contextual/programmable key.
     */
    public static final int KEYCODE_PROG_BLUE = 186;
    /**
     * Key code constant: App switch key.
     * Should bring up the application switcher dialog.
     */
    public static final int KEYCODE_APP_SWITCH = 187;
    /**
     * Key code constant: Generic Game Pad Button #1.
     */
    public static final int KEYCODE_BUTTON_1 = 188;
    /**
     * Key code constant: Generic Game Pad Button #2.
     */
    public static final int KEYCODE_BUTTON_2 = 189;
    /**
     * Key code constant: Generic Game Pad Button #3.
     */
    public static final int KEYCODE_BUTTON_3 = 190;
    /**
     * Key code constant: Generic Game Pad Button #4.
     */
    public static final int KEYCODE_BUTTON_4 = 191;
    /**
     * Key code constant: Generic Game Pad Button #5.
     */
    public static final int KEYCODE_BUTTON_5 = 192;
    /**
     * Key code constant: Generic Game Pad Button #6.
     */
    public static final int KEYCODE_BUTTON_6 = 193;
    /**
     * Key code constant: Generic Game Pad Button #7.
     */
    public static final int KEYCODE_BUTTON_7 = 194;
    /**
     * Key code constant: Generic Game Pad Button #8.
     */
    public static final int KEYCODE_BUTTON_8 = 195;
    /**
     * Key code constant: Generic Game Pad Button #9.
     */
    public static final int KEYCODE_BUTTON_9 = 196;
    /**
     * Key code constant: Generic Game Pad Button #10.
     */
    public static final int KEYCODE_BUTTON_10 = 197;
    /**
     * Key code constant: Generic Game Pad Button #11.
     */
    public static final int KEYCODE_BUTTON_11 = 198;
    /**
     * Key code constant: Generic Game Pad Button #12.
     */
    public static final int KEYCODE_BUTTON_12 = 199;
    /**
     * Key code constant: Generic Game Pad Button #13.
     */
    public static final int KEYCODE_BUTTON_13 = 200;
    /**
     * Key code constant: Generic Game Pad Button #14.
     */
    public static final int KEYCODE_BUTTON_14 = 201;
    /**
     * Key code constant: Generic Game Pad Button #15.
     */
    public static final int KEYCODE_BUTTON_15 = 202;
    /**
     * Key code constant: Generic Game Pad Button #16.
     */
    public static final int KEYCODE_BUTTON_16 = 203;
    /**
     * Key code constant: Language Switch key.
     * Toggles the current input language such as switching between English and Japanese on
     * a QWERTY keyboard.  On some devices, the same function may be performed by
     * pressing Shift+Spacebar.
     */
    public static final int KEYCODE_LANGUAGE_SWITCH = 204;
    /**
     * Key code constant: Manner Mode key.
     * Toggles silent or vibrate mode on and off to make the device behave more politely
     * in certain settings such as on a crowded train.  On some devices, the key may only
     * operate when long-pressed.
     */
    public static final int KEYCODE_MANNER_MODE = 205;
    /**
     * Key code constant: 3D Mode key.
     * Toggles the display between 2D and 3D mode.
     */
    public static final int KEYCODE_3D_MODE = 206;
    /**
     * Key code constant: Contacts special function key.
     * Used to launch an address book application.
     */
    public static final int KEYCODE_CONTACTS = 207;
    /**
     * Key code constant: Calendar special function key.
     * Used to launch a calendar application.
     */
    public static final int KEYCODE_CALENDAR = 208;
    /**
     * Key code constant: Music special function key.
     * Used to launch a music player application.
     */
    public static final int KEYCODE_MUSIC = 209;
    /**
     * Key code constant: Calculator special function key.
     * Used to launch a calculator application.
     */
    public static final int KEYCODE_CALCULATOR = 210;
    /**
     * Key code constant: Japanese full-width / half-width key.
     */
    public static final int KEYCODE_ZENKAKU_HANKAKU = 211;
    /**
     * Key code constant: Japanese alphanumeric key.
     */
    public static final int KEYCODE_EISU = 212;
    /**
     * Key code constant: Japanese non-conversion key.
     */
    public static final int KEYCODE_MUHENKAN = 213;
    /**
     * Key code constant: Japanese conversion key.
     */
    public static final int KEYCODE_HENKAN = 214;
    /**
     * Key code constant: Japanese katakana / hiragana key.
     */
    public static final int KEYCODE_KATAKANA_HIRAGANA = 215;
    /**
     * Key code constant: Japanese Yen key.
     */
    public static final int KEYCODE_YEN = 216;
    /**
     * Key code constant: Japanese Ro key.
     */
    public static final int KEYCODE_RO = 217;
    /**
     * Key code constant: Japanese kana key.
     */
    public static final int KEYCODE_KANA = 218;
    /**
     * Key code constant: Assist key.
     * Launches the global assist activity.  Not delivered to applications.
     */
    public static final int KEYCODE_ASSIST = 219;
    /**
     * Key code constant: Brightness Down key.
     * Adjusts the screen brightness down.
     */
    public static final int KEYCODE_BRIGHTNESS_DOWN = 220;
    /**
     * Key code constant: Brightness Up key.
     * Adjusts the screen brightness up.
     */
    public static final int KEYCODE_BRIGHTNESS_UP = 221;
    /**
     * Key code constant: Audio Track key.
     * Switches the audio tracks.
     */
    public static final int KEYCODE_MEDIA_AUDIO_TRACK = 222;
    /**
     * Key code constant: Sleep key.
     * Puts the device to sleep.  Behaves somewhat like {@link #KEYCODE_POWER} but it
     * has no effect if the device is already asleep.
     */
    public static final int KEYCODE_SLEEP = 223;
    /**
     * Key code constant: Wakeup key.
     * Wakes up the device.  Behaves somewhat like {@link #KEYCODE_POWER} but it
     * has no effect if the device is already awake.
     */
    public static final int KEYCODE_WAKEUP = 224;
    /**
     * Key code constant: Pairing key.
     * Initiates peripheral pairing mode. Useful for pairing remote control
     * devices or game controllers, especially if no other input mode is
     * available.
     */
    public static final int KEYCODE_PAIRING = 225;
    /**
     * Key code constant: Media Top Menu key.
     * Goes to the top of media menu.
     */
    public static final int KEYCODE_MEDIA_TOP_MENU = 226;
    /**
     * Key code constant: '11' key.
     */
    public static final int KEYCODE_11 = 227;
    /**
     * Key code constant: '12' key.
     */
    public static final int KEYCODE_12 = 228;
    /**
     * Key code constant: Last Channel key.
     * Goes to the last viewed channel.
     */
    public static final int KEYCODE_LAST_CHANNEL = 229;
    /**
     * Key code constant: TV data service key.
     * Displays data services like weather, sports.
     */
    public static final int KEYCODE_TV_DATA_SERVICE = 230;
    /**
     * Key code constant: Voice Assist key.
     * Launches the global voice assist activity. Not delivered to applications.
     */
    public static final int KEYCODE_VOICE_ASSIST = 231;
    /**
     * Key code constant: Radio key.
     * Toggles TV service / Radio service.
     */
    public static final int KEYCODE_TV_RADIO_SERVICE = 232;
    /**
     * Key code constant: Teletext key.
     * Displays Teletext service.
     */
    public static final int KEYCODE_TV_TELETEXT = 233;
    /**
     * Key code constant: Number entry key.
     * Initiates to enter multi-digit channel nubmber when each digit key is assigned
     * for selecting separate channel. Corresponds to Number Entry Mode (0x1D) of CEC
     * User Control Code.
     */
    public static final int KEYCODE_TV_NUMBER_ENTRY = 234;
    /**
     * Key code constant: Analog Terrestrial key.
     * Switches to analog terrestrial broadcast service.
     */
    public static final int KEYCODE_TV_TERRESTRIAL_ANALOG = 235;
    /**
     * Key code constant: Digital Terrestrial key.
     * Switches to digital terrestrial broadcast service.
     */
    public static final int KEYCODE_TV_TERRESTRIAL_DIGITAL = 236;
    /**
     * Key code constant: Satellite key.
     * Switches to digital satellite broadcast service.
     */
    public static final int KEYCODE_TV_SATELLITE = 237;
    /**
     * Key code constant: BS key.
     * Switches to BS digital satellite broadcasting service available in Japan.
     */
    public static final int KEYCODE_TV_SATELLITE_BS = 238;
    /**
     * Key code constant: CS key.
     * Switches to CS digital satellite broadcasting service available in Japan.
     */
    public static final int KEYCODE_TV_SATELLITE_CS = 239;
    /**
     * Key code constant: BS/CS key.
     * Toggles between BS and CS digital satellite services.
     */
    public static final int KEYCODE_TV_SATELLITE_SERVICE = 240;
    /**
     * Key code constant: Toggle Network key.
     * Toggles selecting broacast services.
     */
    public static final int KEYCODE_TV_NETWORK = 241;
    /**
     * Key code constant: Antenna/Cable key.
     * Toggles broadcast input source between antenna and cable.
     */
    public static final int KEYCODE_TV_ANTENNA_CABLE = 242;
    /**
     * Key code constant: HDMI #1 key.
     * Switches to HDMI input #1.
     */
    public static final int KEYCODE_TV_INPUT_HDMI_1 = 243;
    /**
     * Key code constant: HDMI #2 key.
     * Switches to HDMI input #2.
     */
    public static final int KEYCODE_TV_INPUT_HDMI_2 = 244;
    /**
     * Key code constant: HDMI #3 key.
     * Switches to HDMI input #3.
     */
    public static final int KEYCODE_TV_INPUT_HDMI_3 = 245;
    /**
     * Key code constant: HDMI #4 key.
     * Switches to HDMI input #4.
     */
    public static final int KEYCODE_TV_INPUT_HDMI_4 = 246;
    /**
     * Key code constant: Composite #1 key.
     * Switches to composite video input #1.
     */
    public static final int KEYCODE_TV_INPUT_COMPOSITE_1 = 247;
    /**
     * Key code constant: Composite #2 key.
     * Switches to composite video input #2.
     */
    public static final int KEYCODE_TV_INPUT_COMPOSITE_2 = 248;
    /**
     * Key code constant: Component #1 key.
     * Switches to component video input #1.
     */
    public static final int KEYCODE_TV_INPUT_COMPONENT_1 = 249;
    /**
     * Key code constant: Component #2 key.
     * Switches to component video input #2.
     */
    public static final int KEYCODE_TV_INPUT_COMPONENT_2 = 250;
    /**
     * Key code constant: VGA #1 key.
     * Switches to VGA (analog RGB) input #1.
     */
    public static final int KEYCODE_TV_INPUT_VGA_1 = 251;
    /**
     * Key code constant: Audio description key.
     * Toggles audio description off / on.
     */
    public static final int KEYCODE_TV_AUDIO_DESCRIPTION = 252;
    /**
     * Key code constant: Audio description mixing volume up key.
     * Louden audio description volume as compared with normal audio volume.
     */
    public static final int KEYCODE_TV_AUDIO_DESCRIPTION_MIX_UP = 253;
    /**
     * Key code constant: Audio description mixing volume down key.
     * Lessen audio description volume as compared with normal audio volume.
     */
    public static final int KEYCODE_TV_AUDIO_DESCRIPTION_MIX_DOWN = 254;
    /**
     * Key code constant: Zoom mode key.
     * Changes Zoom mode (Normal, Full, Zoom, Wide-zoom, etc.)
     */
    public static final int KEYCODE_TV_ZOOM_MODE = 255;
    /**
     * Key code constant: Contents menu key.
     * Goes to the title list. Corresponds to Contents Menu (0x0B) of CEC User Control
     * Code
     */
    public static final int KEYCODE_TV_CONTENTS_MENU = 256;
    /**
     * Key code constant: Media context menu key.
     * Goes to the context menu of media contents. Corresponds to Media Context-sensitive
     * Menu (0x11) of CEC User Control Code.
     */
    public static final int KEYCODE_TV_MEDIA_CONTEXT_MENU = 257;
    /**
     * Key code constant: Timer programming key.
     * Goes to the timer recording menu. Corresponds to Timer Programming (0x54) of
     * CEC User Control Code.
     */
    public static final int KEYCODE_TV_TIMER_PROGRAMMING = 258;
    /**
     * Key code constant: Help key.
     */
    public static final int KEYCODE_HELP = 259;
    /**
     * Key code constant: Navigate to previous key.
     * Goes backward by one item in an ordered collection of items.
     */
    public static final int KEYCODE_NAVIGATE_PREVIOUS = 260;
    /**
     * Key code constant: Navigate to next key.
     * Advances to the next item in an ordered collection of items.
     */
    public static final int KEYCODE_NAVIGATE_NEXT = 261;
    /**
     * Key code constant: Navigate in key.
     * Activates the item that currently has focus or expands to the next level of a navigation
     * hierarchy.
     */
    public static final int KEYCODE_NAVIGATE_IN = 262;
    /**
     * Key code constant: Navigate out key.
     * Backs out one level of a navigation hierarchy or collapses the item that currently has
     * focus.
     */
    public static final int KEYCODE_NAVIGATE_OUT = 263;
    /**
     * Key code constant: Primary stem key for Wear
     * Main power/reset button on watch.
     */
    public static final int KEYCODE_STEM_PRIMARY = 264;
    /**
     * Key code constant: Generic stem key 1 for Wear
     */
    public static final int KEYCODE_STEM_1 = 265;
    /**
     * Key code constant: Generic stem key 2 for Wear
     */
    public static final int KEYCODE_STEM_2 = 266;
    /**
     * Key code constant: Generic stem key 3 for Wear
     */
    public static final int KEYCODE_STEM_3 = 267;
    /**
     * Key code constant: Directional Pad Up-Left
     */
    public static final int KEYCODE_DPAD_UP_LEFT = 268;
    /**
     * Key code constant: Directional Pad Down-Left
     */
    public static final int KEYCODE_DPAD_DOWN_LEFT = 269;
    /**
     * Key code constant: Directional Pad Up-Right
     */
    public static final int KEYCODE_DPAD_UP_RIGHT = 270;
    /**
     * Key code constant: Directional Pad Down-Right
     */
    public static final int KEYCODE_DPAD_DOWN_RIGHT = 271;
    /**
     * Key code constant: Skip forward media key.
     */
    public static final int KEYCODE_MEDIA_SKIP_FORWARD = 272;
    /**
     * Key code constant: Skip backward media key.
     */
    public static final int KEYCODE_MEDIA_SKIP_BACKWARD = 273;
    /**
     * Key code constant: Step forward media key.
     * Steps media forward, one frame at a time.
     */
    public static final int KEYCODE_MEDIA_STEP_FORWARD = 274;
    /**
     * Key code constant: Step backward media key.
     * Steps media backward, one frame at a time.
     */
    public static final int KEYCODE_MEDIA_STEP_BACKWARD = 275;
    /**
     * Key code constant: put device to sleep unless a wakelock is held.
     */
    public static final int KEYCODE_SOFT_SLEEP = 276;
    /**
     * Key code constant: Cut key.
     */
    public static final int KEYCODE_CUT = 277;
    /**
     * Key code constant: Copy key.
     */
    public static final int KEYCODE_COPY = 278;
    /**
     * Key code constant: Paste key.
     */
    public static final int KEYCODE_PASTE = 279;
    /**
     * Key code constant: Consumed by the system for navigation up
     */
    public static final int KEYCODE_SYSTEM_NAVIGATION_UP = 280;
    /**
     * Key code constant: Consumed by the system for navigation down
     */
    public static final int KEYCODE_SYSTEM_NAVIGATION_DOWN = 281;
    /**
     * Key code constant: Consumed by the system for navigation left
     */
    public static final int KEYCODE_SYSTEM_NAVIGATION_LEFT = 282;
    /**
     * Key code constant: Consumed by the system for navigation right
     */
    public static final int KEYCODE_SYSTEM_NAVIGATION_RIGHT = 283;

    private static final int LAST_KEYCODE = KEYCODE_SYSTEM_NAVIGATION_RIGHT;
}

发表评论

CAPTCHAis initialing...