android 驱动层检测TP按了几个手指数量

程序员文章站 2022-06-22 17:53:33

首先执行以下三条命令[]1 adb shell[2] su[3] getevent -rtl会打印类似以下信息设备节点信息：add device 1: /dev/input/event3 name: "focaltech_ts"add device 2: /dev/input/event2 name: "accelerometer"could not get driver version for /dev/input/mice, Not a typewrit......

首先执行以下三条命令

[]1 adb shell

[2] su

[3] getevent -rtl

会打印类似以下信息设备节点信息：

add device 1: /dev/input/event3
name: "focaltech_ts"
add device 2: /dev/input/event2
name: "accelerometer"
could not get driver version for /dev/input/mice, Not a typewriter
add device 3: /dev/input/event0
name: "stk_als"
add device 4: /dev/input/event1
name: "proximity"
add device 5: /dev/input/event4
name: "sc27xx:vibrator"
add device 6: /dev/input/event7
name: "sprdphone Headset Keyboard"
add device 7: /dev/input/event5
name: "gpio-keys"
add device 8: /dev/input/event6
name: "sprdphone Headset Jack"

当你一个手指按到屏幕时会打印：

[ 132300.819016] /dev/input/event3: EV_ABS ABS_MT_TRACKING_ID 00000263 //打印一个ID 则代表一个手触屏
[ 132300.819016] /dev/input/event3: EV_ABS ABS_MT_POSITION_X 000000ca
[ 132300.819016] /dev/input/event3: EV_ABS ABS_MT_POSITION_Y 000001b5
[ 132300.819016] /dev/input/event3: EV_KEY BTN_TOUCH DOWN //动作状态down
[ 132300.819016] /dev/input/event3: EV_SYN SYN_REPORT 00000000 rate 0

抬起一个手指时打印：

[ 132302.202497] /dev/input/event3: EV_ABS ABS_MT_TRACKING_ID ffffffff
[ 132302.202497] /dev/input/event3: EV_KEY BTN_TOUCH UP //抬起手指
[ 132302.202497] /dev/input/event3: EV_SYN SYN_REPORT 00000000 rate 0

当你两个手指按到屏幕时会打印：则会打印两组ABS_MT_TRACKING_ID，一组ABS_MT_TRACKING_ID代表一个手指触屏

[ 132471.322353] /dev/input/event3: EV_ABS ABS_MT_TRACKING_ID 00000264
[ 132471.322353] /dev/input/event3: EV_ABS ABS_MT_POSITION_X 0000015b
[ 132471.322353] /dev/input/event3: EV_ABS ABS_MT_POSITION_Y 00000185
[ 132471.322353] /dev/input/event3: EV_KEY BTN_TOUCH DOWN
[ 132471.322353] /dev/input/event3: EV_ABS ABS_MT_SLOT 00000001
[ 132471.322353] /dev/input/event3: EV_ABS ABS_MT_TRACKING_ID 00000265
[ 132471.322353] /dev/input/event3: EV_ABS ABS_MT_POSITION_X 000000b2
[ 132471.322353] /dev/input/event3: EV_ABS ABS_MT_POSITION_Y 0000015c
[ 132471.322353] /dev/input/event3: EV_SYN SYN_REPORT 00000000 rate 0

抬起两个手指时打印：也会报两组 ABS_MT_TRACKING_ID，

[ 132473.346652] /dev/input/event3: EV_ABS ABS_MT_TRACKING_ID ffffffff
[ 132473.346652] /dev/input/event3: EV_SYN SYN_REPORT 00000000 rate 0
[ 132473.356032] /dev/input/event3: EV_ABS ABS_MT_SLOT 00000000
[ 132473.356032] /dev/input/event3: EV_ABS ABS_MT_TRACKING_ID ffffffff
[ 132473.356032] /dev/input/event3: EV_KEY BTN_TOUCH UP
[ 132473.356032] /dev/input/event3: EV_SYN SYN_REPORT 00000000 rate 106

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