getevent 工具可在设备上运行，并可提供关于输入设备和内核输入事件的实时转储的信息。
此工具非常实用，可确保设备驱动程序报告各个输入设备的一系列预期功能并生成输入事件的所需信息流。
显示设备功能
使用带有 adb 命令的 -p 选项来查看设备报告的所有键和轴。
adb shell
su
getevent -p以下示例是我的华为手机列出了特定键盘所支持的 Linux 键码和其他事件。
HWPRA-H:/ $ getevent -p
add device 1: /dev/input/event1
name: "hisi_on"
events:
KEY (0001): 0074
input props:
<none>
add device 2: /dev/input/event0
name: "hisi_gpio_key"
events:
KEY (0001): 0072 0073
input props:
<none>
add device 3: /dev/input/event2
name: "fingerprint"
events:
KEY (0001): 001c 0027 0029 002a 002c 002f 0031 0067
0069 006a 006c 006e 006f 0071 00ae
input props:
<none>
add device 4: /dev/input/event4
name: "cyttsp5_mt"
events:
KEY (0001): 003b 003c 003d 003e 003f 0040 0041 0042
0043 0044 0057 0058 0074
ABS (0003): 002f : value 0, min 0, max 31, fuzz 0, flat 0, resolution 0
0030 : value 0, min 0, max 255, fuzz 0, flat 0, resolution 0
0031 : value 0, min 0, max 255, fuzz 0, flat 0, resolution 0
0034 : value 0, min -297, max 127, fuzz 0, flat 0, resolution 0
0035 : value 0, min 0, max 1079, fuzz 0, flat 0, resolution 0
0036 : value 0, min 0, max 1919, fuzz 0, flat 0, resolution 0
0039 : value 0, min 0, max 65535, fuzz 0, flat 0, resolution 0
003a : value 0, min 0, max 255, fuzz 0, flat 0, resolution 0
input props:
INPUT_PROP_DIRECT
add device 5: /dev/input/event3
name: "HI6250_hi6555c_CARD Headset Jack"
events:
KEY (0001): 0072 0073 00e2
SW (0005): 0002 0004
input props:
<none>
could not get driver version for /dev/input/mice, Not a typewriter
使用 -i 选项可获取更多信息，包括 HID 映射表和调试信息。
使用 -l 选项可显示所有事件代码的文字标签。
HWPRA-H:/ $ getevent -lpi
add device 1: /dev/input/event1
bus: 0000
vendor 0000
product 0000
version 0000
name: "hisi_on"
location: "hisi_on/input0"
id: ""
version: 1.0.1
events:
KEY (0001): KEY_POWER
input props:
<none>
add device 2: /dev/input/event0
bus: 0019
vendor 0000
product 0000
version 0000
name: "hisi_gpio_key"
location: ""
id: ""
version: 1.0.1
events:
KEY (0001): KEY_VOLUMEDOWN KEY_VOLUMEUP
input props:
<none>
add device 3: /dev/input/event2
bus: 0000
vendor 0000
product 0000
version 0000
name: "fingerprint"
location: ""
id: ""
version: 1.0.1
events:
KEY (0001): KEY_ENTER KEY_SEMICOLON KEY_GRAVE KEY_LEFTSHIFT
KEY_Z KEY_V KEY_N KEY_UP
KEY_LEFT KEY_RIGHT KEY_DOWN KEY_INSERT
KEY_DELETE KEY_MUTE KEY_EXIT
input props:
<none>
add device 4: /dev/input/event4
bus: 0000
vendor 0000
product 0000
version 0000
name: "cyttsp5_mt"
location: "0-001c/input0"
id: ""
version: 1.0.1
events:
KEY (0001): KEY_F1 KEY_F2 KEY_F3 KEY_F4
KEY_F5 KEY_F6 KEY_F7 KEY_F8
KEY_F9 KEY_F10 KEY_F11 KEY_F12
KEY_POWER
ABS (0003): ABS_MT_SLOT : value 0, min 0, max 31, fuzz 0, flat 0, resolution 0
ABS_MT_TOUCH_MAJOR : value 0, min 0, max 255, fuzz 0, flat 0, resolution 0
ABS_MT_TOUCH_MINOR : value 0, min 0, max 255, fuzz 0, flat 0, resolution 0
ABS_MT_ORIENTATION : value 0, min -297, max 127, fuzz 0, flat 0, resolution 0
ABS_MT_POSITION_X : value 0, min 0, max 1079, fuzz 0, flat 0, resolution 0
ABS_MT_POSITION_Y : value 0, min 0, max 1919, fuzz 0, flat 0, resolution 0
ABS_MT_TRACKING_ID : value 0, min 0, max 65535, fuzz 0, flat 0, resolution 0
ABS_MT_PRESSURE : value 0, min 0, max 255, fuzz 0, flat 0, resolution 0
input props:
INPUT_PROP_DIRECT
add device 5: /dev/input/event3
bus: 0000
vendor 0000
product 0000
version 0000
name: "HI6250_hi6555c_CARD Headset Jack"
location: "ALSA"
id: ""
version: 1.0.1
events:
KEY (0001): KEY_VOLUMEDOWN KEY_VOLUMEUP KEY_MEDIA
SW (0005): SW_HEADPHONE_INSERT SW_MICROPHONE_INSERT
input props:
<none>
could not get driver version for /dev/input/mice, Not a typewriter
显示实时事件
以下示例显示了使用 Linux 多点触控输入协议“B”的触摸屏的双指多点触控手势。-l 选项可显示文字标签，而 -t 选项则可显示时间戳。
adb shell su -- getevent -lt示例：
HWPRA-H:/ $ getevent -lt
add device 1: /dev/input/event1
name: "hisi_on"
add device 2: /dev/input/event0
name: "hisi_gpio_key"
add device 3: /dev/input/event2
name: "fingerprint"
add device 4: /dev/input/event4
name: "cyttsp5_mt"
add device 5: /dev/input/event3
name: "HI6250_hi6555c_CARD Headset Jack"
could not get driver version for /dev/input/mice, Not a typewriter
[ 148267.677826] /dev/input/event1: EV_KEY KEY_POWER DOWN
[ 148267.677826] /dev/input/event1: EV_SYN SYN_REPORT 00000000
[ 148267.939404] /dev/input/event1: EV_KEY KEY_POWER UP
[ 148267.939404] /dev/input/event1: EV_SYN SYN_REPORT 00000000
[ 148269.742895] /dev/input/event4: EV_ABS ABS_MT_TRACKING_ID 00004add
[ 148269.742895] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000023c
[ 148269.742895] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000653
[ 148269.742895] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000065
[ 148269.742895] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.794925] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000248
[ 148269.794925] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000635
[ 148269.794925] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000072
[ 148269.794925] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.803988] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000024e
[ 148269.803988] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 0000061e
[ 148269.803988] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000073
[ 148269.803988] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.812637] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000251
[ 148269.812637] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 0000060a
[ 148269.812637] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000076
[ 148269.812637] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.821469] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000256
[ 148269.821469] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000005ec
[ 148269.821469] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000077
[ 148269.821469] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.830535] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000025b
[ 148269.830535] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000005cd
[ 148269.830535] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000079
[ 148269.830535] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.839488] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000025f
[ 148269.839488] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000005ad
[ 148269.839488] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 0000007b
[ 148269.839488] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.848362] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000265
[ 148269.848362] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 0000058e
[ 148269.848362] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 0000007c
[ 148269.848362] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.857377] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000026a
[ 148269.857377] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000571
[ 148269.857377] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000080
[ 148269.857377] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.866292] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000026e
[ 148269.866292] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000553
[ 148269.866292] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.875210] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000272
[ 148269.875210] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000535
[ 148269.875210] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.884144] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000277
[ 148269.884144] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000518
[ 148269.884144] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.893041] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000027a
[ 148269.893041] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000004fc
[ 148269.893041] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.902004] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000027e
[ 148269.902004] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000004de
[ 148269.902004] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.910921] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000284
[ 148269.910921] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000004c1
[ 148269.910921] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.919913] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000288
[ 148269.919913] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000004a4
[ 148269.919913] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 0000007d
[ 148269.919913] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.928727] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000028c
[ 148269.928727] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000486
[ 148269.928727] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.937538] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000291
[ 148269.937538] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000469
[ 148269.937538] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.946524] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000296
[ 148269.946524] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 0000044d
[ 148269.946524] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000081
[ 148269.946524] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.955401] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 00000298
[ 148269.955401] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 0000042e
[ 148269.955401] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.964314] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 0000029d
[ 148269.964314] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 00000410
[ 148269.964314] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.973228] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 000002a0
[ 148269.973228] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000003f3
[ 148269.973228] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000083
[ 148269.973228] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.982233] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000003de
[ 148269.982233] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000084
[ 148269.982233] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148269.991177] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 000002a4
[ 148269.991177] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000003c4
[ 148269.991177] /dev/input/event4: EV_ABS ABS_MT_PRESSURE 00000082
[ 148269.991177] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148270.000113] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 000002a6
[ 148270.000113] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000003b0
[ 148270.000113] /dev/input/event4: EV_SYN SYN_REPORT 00000000
[ 148270.009064] /dev/input/event4: EV_ABS ABS_MT_POSITION_X 000002a9
[ 148270.009064] /dev/input/event4: EV_ABS ABS_MT_POSITION_Y 000003a4
[ 148270.009064] /dev/input/event4: EV_SYN SYN_REPORT 00000000