Android手机下getevent/sendevent，源代码路径system/core/toolbox/下，sendevent.c getevent.c getevent.h

getevent

使用getevent获得/dev/input/eventX设备汇报的事件，这个命令还会输出所有event设备的基本信息，

add device 1: /dev/input/event2
  name:     "qpnp_pon"
add device 2: /dev/input/event0
  name:     "sensorprocessor"
could not get driver version for /dev/input/mice, Not a typewriter
add device 3: /dev/input/event5
  name:     "gpio-keys"
add device 4: /dev/input/event4
  name:     "msm8994-florida-snd-card Headset Jack"
add device 5: /dev/input/event3
  name:     "msm8994-florida-snd-card Button Jack"
add device 6: /dev/input/event1
  name:     "synaptics_dsx_i2c"

其中如上对应关系

device 6: /dev/input/event1："synaptics_dsx_i2c" ===》显示屏touchscreen

device 3: /dev/input/event5："gpio-keys"              ===》键盘keypad

device 1: /dev/input/event2： "qpnp_pon"            ===》按键pwrkey

Android可以使用sendevent来模拟触屏，键盘以及其他类型的event事件，

sendevent /dev/input/eventX type code value

/dev/input/eventX 对应一个event设备，可以通过getevent获得可用的event设备

type, code, value的定义可参看kernel/include/linux/input.h和kernel/include/uapi/input.h

input

root@:/dev/input # ll
ll
crw-rw---- root     input     13,  64 1970-01-15 11:37 event0
crw-rw---- root     input     13,  65 1970-01-15 11:37 event1
crw-rw---- root     input     13,  66 1970-01-15 11:37 event2
crw-rw---- root     input     13,  67 1970-01-15 11:37 event3
crw-rw---- root     input     13,  68 1970-01-15 11:37 event4
crw-rw---- root     input     13,  69 1970-01-15 11:37 event5
crw-rw---- root     input     13,  63 1970-01-15 11:37 mice

与event对应的相关设备信息位于/proc/bus/input/devices，