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 3
I: 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=1
I: 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 0
I: 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 event3
cat 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
dumpsys
dumpsys input：
To dump the input system’s state (Event Hub State,Input Reader State,Input Dispatcher State)