Android getevent用法詳解
阿新 • • 發佈：2018-12-10
getevent 指令用於獲取 input 輸入事件，比如獲取按鍵上報資訊、獲取觸控式螢幕上報資訊等。
指令原始碼路徑：/system/core/toolbox/getevent.c
getevent -h：檢視 getevent 幫助資訊
[email protected]:/ # getevent -h 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
getevent：顯示當前有那些輸入裝置，數量與 /dev/input 目錄下相同
[email protected]:/ # getevent getevent add device 1: /dev/input/event3 name: "ILITEK Multi-Touch-V3020" add device 2: /dev/input/event2 name: "PC Camera" add device 3: /dev/input/event1 name: "gsensor" add device 4: /dev/input/event0 name: "rk29-keypad"[email protected]:/ # ls /dev/input ls /dev/input event0 event1 event2 event3
檢視預設上報資料
[email protected]:/ # getevent /dev/input/event3 getevent /dev/input/event3 0003 0039 00000004 0003 0035 00002324 0003 0036 00001a9f 0001 014a 00000001 0003 0000 00002324 0003 0001 00001a9f 0000 0000 00000000 0003 0039 ffffffff 0001 014a 00000000 0000 0000 00000000
-t：顯示時間戳
// 讀取 event3 資料（觸控式螢幕） [email protected]:/ # getevent -t /dev/input/event3 getevent -t /dev/input/event3 [ 1141.248434] 0003 0039 0000000e [ 1141.248434] 0003 0035 00002cd4 [ 1141.248434] 0003 0036 00001a09 [ 1141.248434] 0001 014a 00000001 [ 1141.248434] 0003 0000 00002cd4 [ 1141.248434] 0003 0001 00001a09 [ 1141.248434] 0000 0000 00000000 [ 1141.322181] 0003 0039 ffffffff [ 1141.322181] 0001 014a 00000000 [ 1141.322181] 0000 0000 00000000
-n：不換行列印
[email protected]:/ # getevent -n /dev/input/event3 getevent -n /dev/input/event3 0003 0039 000000020003 0035 00002f000003 0036 00001a4e0001 014a 000000010003 0000 00002f000003 0001 00001a4e0000 0000 000000000003 0039 ffffffff0001 014a 000000000000 0000 000000000003 0039 000000030003 0035 00002e880003 0036 000019b80001 014a 000000010003 0000 00002e880003 0001 000019b80000 0000 000000000003 0039 ffffffff0001 014a 000000000000 0000 000000000003 0039 000000040003 0035 00002d700003 0036 00001a000001 014a 000000010003 0000 00002d700003 0001 00001a000000 0000 000000000003 0039 ffffffff0001 014a 000000000000 0000 000000000003 0039 000000050003 0035 00002d080003 0036 000019a50001 014a 000000010003 0000 00002d080003 0001 000019a50000 0000 000000000003 0039 ffffffff0001 014a 000000000000
-s：顯示指定位的開關狀態
[email protected]:/ # getevent -s5 /dev/input/event3 getevent -s5 /dev/input/event3 0000
-S：顯示所有位的開關狀態
[email protected]:/ # getevent -S /dev/input/event3 getevent -S /dev/input/event3 0000
-v：根據 mask 值顯示相關資訊，執行後會一直顯示上報資料
errs=1, dev=2, name=4, info=8, vers=16, pos. events=32, props=64
預設顯示 dev| name| info| vers = 30;
[email protected]:/ # getevent -v /dev/input/event3 getevent -v /dev/input/event3 add device 1: /dev/input/event3 bus: 0003 vendor 222a product 004d version 0110 name: "ILITEK Multi-Touch-V3020" location: "usb-ff540000.usb-1.3/input0" id: "" version: 1.0.1 [email protected]:/ # getevent -v30 /dev/input/event3 getevent -v30 /dev/input/event3 add device 1: /dev/input/event3 bus: 0003 vendor 222a product 004d version 0110 name: "ILITEK Multi-Touch-V3020" location: "usb-ff540000.usb-1.3/input0" id: "" version: 1.0.1 [email protected]:/ # getevent -v2 /dev/input/event3 getevent -v2 /dev/input/event3 add device 1: /dev/input/event3 [email protected]:/ # getevent -v8 /dev/input/event3 getevent -v8 /dev/input/event3 bus: 0003 vendor 222a product 004d version 0110 location: "usb-ff540000.usb-1.3/input0" id: "" [email protected]:/ # getevent -v16 /dev/input/event3 getevent -v16 /dev/input/event3 version: 1.0.1 [email protected]:/ # getevent -v32 /dev/input/event3 getevent -v32 /dev/input/event3 events: KEY (0001): 014a ABS (0003): 0000 : value 12008, min 0, max 16384, fuzz 0, flat 0, resolution 31 0001 : value 5790, min 0, max 9600, fuzz 0, flat 0, resolution 32 002f : value 0, min 0, max 9, fuzz 0, flat 0, resolution 0 0035 : value 0, min 0, max 16384, fuzz 0, flat 0, resolution 31 0036 : value 0, min 0, max 9600, fuzz 0, flat 0, resolution 32 0039 : value 0, min 0, max 65535, fuzz 0, flat 0, resolution 0
-d：如果裝置可用，顯示裝置隱藏的描述資訊
-p：顯示裝置支援的事件型別和編碼方式
[email protected]:/ # getevent -p /dev/input/event3 getevent -p /dev/input/event3 add device 1: /dev/input/event3 name: "ILITEK Multi-Touch-V3020" events: KEY (0001): 014a ABS (0003): 0000 : value 13084, min 0, max 16384, fuzz 0, flat 0, resolution 31 0001 : value 5284, min 0, max 9600, fuzz 0, flat 0, resolution 32 002f : value 0, min 0, max 9, fuzz 0, flat 0, resolution 0 0035 : value 0, min 0, max 16384, fuzz 0, flat 0, resolution 31 0036 : value 0, min 0, max 9600, fuzz 0, flat 0, resolution 32 0039 : value 0, min 0, max 65535, fuzz 0, flat 0, resolution 0 input props: INPUT_PROP_DIRECT
-i：顯示裝置的所有資訊和支援的事件，比 -p 顯示更多資訊
[email protected]:/ # getevent -i /dev/input/event3
-l：以文字形式輸出事件型別和名稱，比 -t 更清楚直觀
// 讀取 event3 資料（觸控式螢幕） [email protected]:/ # getevent -l /dev/input/event3 getevent -l /dev/input/event3 // 事件型別 事件碼 事件值 EV_ABS ABS_MT_TRACKING_ID 0000000f EV_ABS ABS_MT_POSITION_X 00002bbc EV_ABS ABS_MT_POSITION_Y 00001b6d EV_KEY BTN_TOUCH DOWN EV_ABS ABS_X 00002bbc EV_ABS ABS_Y 00001b6d EV_SYN SYN_REPORT 00000000 EV_ABS ABS_MT_TRACKING_ID ffffffff EV_KEY BTN_TOUCH UP EV_SYN SYN_REPORT 00000000
-q：暫時不會使用
-c：列印固定數量的事件並退出
[email protected]:/ # getevent -c 10 /dev/input/event3 getevent -c 10 /dev/input/event3 0003 0039 00000012 0003 0035 000038a4 0003 0036 000008f5 0001 014a 00000001 0003 0000 000038a4 0003 0001 000008f5 0000 0000 00000000 0003 0039 ffffffff 0001 014a 00000000 0000 0000 00000000
-r：顯示事件上報速率
// 檢測觸控式螢幕報點速率 [email protected]:/ # getevent -r /dev/input/event3 getevent -r /dev/input/event3 0003 0039 00000015 0003 0035 000030d8 0003 0036 00001954 0001 014a 00000001 0003 0000 000030d8 0003 0001 00001954 0000 0000 00000000 rate 0 0003 0039 ffffffff 0001 014a 00000000 0000 0000 00000000 rate 9
引數可以組合使用，一次性檢視需要的觸控式螢幕資訊
[email protected]:/ # getevent -tlr /dev/input/event3 getevent -tlr /dev/input/event3 [ 2514.550104] EV_ABS ABS_MT_TRACKING_ID 0000001c [ 2514.550104] EV_ABS ABS_MT_POSITION_X 00002dac [ 2514.550104] EV_ABS ABS_MT_POSITION_Y 000018ca [ 2514.550104] EV_KEY BTN_TOUCH DOWN [ 2514.550104] EV_ABS ABS_X 00002dac [ 2514.550104] EV_ABS ABS_Y 000018ca [ 2514.550104] EV_SYN SYN_REPORT 00000000 rate 0 [ 2514.638845] EV_ABS ABS_MT_TRACKING_ID ffffffff [ 2514.638845] EV_KEY BTN_TOUCH UP [ 2514.638845] EV_SYN SYN_REPORT 00000000 rate 11