getevent/sendevent源码
这两个命令的源码在system/core/toolbox/下,sendevent.c getevent.c
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,如下:
add device 1: /dev/input/event1
name: "mxc_ts"
add device 2: /dev/input/event0
name: "mxckpd"
表明系统有两个event设备,分别对应着input设备touchscreen,keyboard
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
type如下定义
/* * Event types */ #define EV_SYN 0x00 #define EV_KEY 0x01 #define EV_REL 0x02 #define EV_ABS 0x03 #define EV_MSC 0x04 #define EV_SW 0x05 #define EV_LED 0x11 #define EV_SND 0x12 #define EV_REP 0x14 #define EV_FF 0x15 #define EV_PWR 0x16 #define EV_FF_STATUS 0x17 #define EV_MAX 0x1f #define EV_CNT (EV_MAX+1)
分别对应keyboard, 相对坐标, 绝对坐标, 同步事件
EV_SYN则表示一组完整事件已经完成,需要处理,EV_SYN的code定义事件分发的类型
EV_SYN对应的code如下
/* * Synchronization events. */ #define SYN_REPORT 0 #define SYN_CONFIG 1 #define SYN_MT_REPORT 2
EV_REL对应的code
/* * Relative axes */ #define REL_X 0x00 #define REL_Y 0x01 #define REL_Z 0x02 #define REL_RX 0x03 #define REL_RY 0x04 #define REL_RZ 0x05 #define REL_HWHEEL 0x06 #define REL_DIAL 0x07 #define REL_WHEEL 0x08 #define REL_MISC 0x09 #define REL_MAX 0x0f #define REL_CNT (REL_MAX+1)
/* * Absolute axes */ #define ABS_X 0x00 #define ABS_Y 0x01 #define ABS_Z 0x02 #define ABS_RX 0x03 #define ABS_RY 0x04 #define ABS_RZ 0x05 #define ABS_THROTTLE 0x06 #define ABS_RUDDER 0x07 #define ABS_WHEEL 0x08 #define ABS_GAS 0x09 #define ABS_BRAKE 0x0a #define ABS_HAT0X 0x10 #define ABS_HAT0Y 0x11 #define ABS_HAT1X 0x12 #define ABS_HAT1Y 0x13 #define ABS_HAT2X 0x14 #define ABS_HAT2Y 0x15 #define ABS_HAT3X 0x16 #define ABS_HAT3Y 0x17 #define ABS_PRESSURE 0x18 #define ABS_DISTANCE 0x19 #define ABS_TILT_X 0x1a #define ABS_TILT_Y 0x1b #define ABS_TOOL_WIDTH 0x1c #define ABS_VOLUME 0x20 #define ABS_MISC 0x28 #define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */ #define ABS_MT_TOUCH_MINOR 0x31 /* Minor axis (omit if circular) */ #define ABS_MT_WIDTH_MAJOR 0x32 /* Major axis of approaching ellipse */ #define ABS_MT_WIDTH_MINOR 0x33 /* Minor axis (omit if circular) */ #define ABS_MT_ORIENTATION 0x34 /* Ellipse orientation */ #define ABS_MT_POSITION_X 0x35 /* Center X ellipse position */ #define ABS_MT_POSITION_Y 0x36 /* Center Y ellipse position */ #define ABS_MT_TOOL_TYPE 0x37 /* Type of touching device */ #define ABS_MT_BLOB_ID 0x38 /* Group a set of packets as a blob */ #define ABS_MT_TRACKING_ID 0x39 /* Unique ID of initiated contact */ #define ABS_MT_PRESSURE 0x3a /* Pressure on contact area */ #define ABS_MAX 0x3f #define ABS_CNT (ABS_MAX+1)
如果想模拟按键,send event用起来比较繁琐,可以用input keyevent代替
下面是input keyevent几个比较常用的用法:
input keyevent 3 // Home
input keyevent 4 // Back
input keyevent 19 //Up
input keyevent 20 //Down
input keyevent 21 //Left
input keyevent 22 //Right
input keyevent 23 //Select/Ok
input keyevent 24 //Volume+
input keyevent 25 // Volume-
input keyevent 82 // Menu 菜单
用senevent 模拟触屏事件
sendevent /dev/input/event1 0003 0000 0000015e // ABS x 坐标
sendevent /dev/input/event1: 0003 0001 000000df // ABS y 坐标
sendevent /dev/input/event1: 0001 014a 00000001 // BTN touch事件 值为1
sendevent /dev/input/event1: 0003 0018 00000000 // ABS pressure事件
sendevent /dev/input/event1: 0001 014a 00000000 // BTN touch事件 值为0
sendevent /dev/input/event1: 0000 0000 00000000 // sync事件