input系统——android input系统

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AndroidInput系统——JNI NativeInputManager InputManger InputReader

AndroidInput系统——InputReader

AndroidInput系统——InputDispatcher

AndroidInput系统——EventHub

Android Input系统相关结构体

1. input_device_id

struct input_device_id { kernel_ulong_t flags; __u16 bustype; // BUS_USB BUS_BLUETOOTH __u16 vendor; __u16 product; __u16 version; kernel_ulong_t evbit[INPUT_DEVICE_ID_EV_MAX / BITS_PER_LONG + 1]; kernel_ulong_t keybit[INPUT_DEVICE_ID_KEY_MAX / BITS_PER_LONG + 1]; kernel_ulong_t relbit[INPUT_DEVICE_ID_REL_MAX / BITS_PER_LONG + 1]; kernel_ulong_t absbit[INPUT_DEVICE_ID_ABS_MAX / BITS_PER_LONG + 1]; kernel_ulong_t mscbit[INPUT_DEVICE_ID_MSC_MAX / BITS_PER_LONG + 1]; kernel_ulong_t ledbit[INPUT_DEVICE_ID_LED_MAX / BITS_PER_LONG + 1]; kernel_ulong_t sndbit[INPUT_DEVICE_ID_SND_MAX / BITS_PER_LONG + 1]; kernel_ulong_t ffbit[INPUT_DEVICE_ID_FF_MAX / BITS_PER_LONG + 1]; kernel_ulong_t swbit[INPUT_DEVICE_ID_SW_MAX / BITS_PER_LONG + 1]; kernel_ulong_t driver_info; };

2. input_event (input.h)

struct input_event { struct timeval time; __u16 type; __u16 code; __s32 value; };

3. RawEvent (EventHub.h)

struct RawEvent { nsecs_t when; time int32_t deviceId; ID = 1 ID = 0 int32_t type; EV_REL= 0x02 EV_SYN = 0x00 int32_t code; REL_X = 0x00 SYN_REPORT = 0 int32_t value; Value = 0x01 Value = 0x00 };

调试相关

查看event注册设备

shell@rk3368_32:/dev/input # cat /proc/bus/input/devices I: Bus=0000 Vendor=0000 Product=0003 Version=206a N: Name="synaptics_dsx" P: Phys=synaptics_dsx/touch_input S: Sysfs=/devices/ff140000.i2c/i2c-2/2-0020/input/input0 U: Uniq= H: Handlers=event0 cpufreq ddr_freq B: PROP=2 B: EV=b B: KEY=420 0 0 0 0 0 8000 0 0 0 0 B: ABS=2638000 3I: Bus=0019 Vendor=0000 Product=0000 Version=0000 N: Name="rotary.35" P: Phys= S: S 大专栏 input系统——android input系统ysfs=/devices/rotary.35/input/input1 U: Uniq= H: Handlers=event1 B: PROP=0 B: EV=5 B: REL=1I: Bus=0019 Vendor=0001 Product=0001 Version=0100 N: Name="rk29-keypad" P: Phys=gpio-keys/input0 S: Sysfs=/devices/ff100000.adc/key.38/input/input2 U: Uniq= H: Handlers=event2 ddr_freq keychord B: PROP=0 B: EV=3 B: KEY=8000 100000 0 0 0I: Bus=0000 Vendor=0000 Product=0000 Version=0000 N: Name="temperature" P: Phys= S: Sysfs=/devices/ff160000.i2c/i2c-4/4-005b/input/input3 U: Uniq= H: Handlers=event3 B: PROP=0 B: EV=9 B: ABS=40

查看Handler个数

shell@rk3368_box:/dev/input # ls -l crw-rw---- root input 13, 64 2017-04-12 11:15 event0 crw-rw---- root input 13, 65 2017-04-12 11:15 event1 crw-rw---- root input 13, 66 2017-04-14 08:12 event2 crw-rw---- root input 13, 67 2017-04-14 08:12 event3cat event0 cat event1

getevent 获取事件

# getevent -h Usage: getevent [-t] [-n] [-s switchmask] [-S] [-v [mask]] [-d] [-p] [-i] [-l] [-q] [-c count] [-r] [device] -t: show time stamps -n: don't print newlines -s: print switch states for given bits -S: print all switch states -v: verbosity mask (errs=1, dev=2, name=4, info=8, vers=16, pos. events=32, props=64) -d: show HID descriptor, if available -p: show possible events (errs, dev, name, pos. events) -i: show all device info and possible events -l: label event types and names in plain text -q: quiet (clear verbosity mask) -c: print given number of events then exit -r: print rate events are received常用命令组合： getevent -p // see all of the keys and axes a device reports getevent -ip // get more information, including HID mapping tables and debugging information getevent -lp // option to display textual labels for all event codes getevent -lp getevent -r -q 监控设备的sendevent事件 getevent -p add device 1: /dev/input/event3 name: "temperature" add device 2: /dev/input/event1 name: "rotary.35" add device 3: /dev/input/event0 name: "synaptics_dsx" add device 4: /dev/input/event2 name: "rk29-keypad"/dev/input/event1: 0002 0000 00000001 ID=1 EV_REL=0x02 REL_X = 0x00 Value = 0x01 /dev/input/event1: 0000 0000 00000000 ID=0 EV_SYN 0x00 SYN_REPORT = 0 Value = 0x00 /dev/input/event1: 0002 0000 00000001 /dev/input/event1: 0000 0000 00000000 /dev/input/event1: 0002 0000 00000001 /dev/input/event1: 0000 0000 00000000 /dev/input/event1: 0002 0000 ffffffff EV_REL=0x02 REL_X = 0x00 Value = 0xffffffffff /dev/input/event1: 0000 0000 00000000 /dev/input/event1: 0002 0000 ffffffff