在 Android 通过 get_event 获得 input 设备上报event

最新推荐文章于 2025-06-15 19:51:33 发布

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最新推荐文章于 2025-06-15 19:51:33 发布 · 1.2w 阅读

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本文介绍了Android系统中用于获取input设备上报event的工具get_event，包括如何使用该工具以及如何通过静态编译和adb推送进行调试。内容涵盖红外gp2ap、touchscreen、物理按键key和headset的上报event，以及get_event.c源码的调试方法。

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Android 本身有一个genevnet 和 sendevent 工具用来从内核获取event事件和向内核发送event事件，具体可以参考 Android 下收发input事件的工具 getevent 和 sendevent

o get_evnet 是一个可以获得注册成input设备上报event的调试工具。

o usage: get_event /dev/input/eventX, X is 0, 1, 2，3, 4, 5，6

o 附件为其源代码，可以采用静态编译，然后通过adb push进手机，进行调试。

arm-linux-gcc -static get_event.c -o get_evnet

-> 获得红外gp2ap 的上报 event

   shell@android:/ # get_event /dev/input/event0
   Input driver version is 1.0.1
   Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
   Input device name: gp2ap
   Supported events:
      Event type 0 (Sync)
      Event type 3 (Absolute)
       Event code 25 (Distance)
          Value     -1
          Min        0
          Max        1
       Event code 40 (Misc)
          Value      0
          Min        0
          Max    65535

Testing ... (interrupt to exit)

-> 获得touchscreen 的上报 event

130|shell@android:/ # get_event /dev/input/event1
Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x0 product 0x1 version 0x1005
Input device name: mx_ts
Supported events:
Event type 0 (Sync)
Event type 1 (Key)
    Event code 102 (Home)
    Event code 103 (Up)
    Event code 105 (Left)
    Event code 106 (Right)
    Event code 107 (End)
    Event code 108 (Down)
    Event code 129 (Again)
    Event code 158 (Back)
    Event code 325 (ToolFinger)
    Event code 330 (Touch)
Event type 3 (Absolute)
    Event code 0 (X)
      Value      0
      Min        0
      Max     1334
    Event code 1 (Y)
      Value      0
      Min        0
      Max     2214
    Event code 24 (Pressure)
      Value      0
      Min        0
      Max      255
    Event code 47 (?)
      Value      0
      Min        0
      Max        9
    Event code 48 (ABS_MT_TOUCH_MAJOR)
      Value      0
      Min        0
      Max       15
    Event code 53 (ABS_MT_POSITION_X)
      Value      0
      Min        0
      Max     1334
    Event code 54 (ABS_MT_POSITION_Y)
      Value      0
      Min        0
      Max     2214
    Event code 57 (ABS_MT_TRACKING_ID)
      Value      0
      Min        0
      Max    65535
    Event code 58 (ABS_MT_PRESSURE)
      Value      0
      Min        0
      Max      255
Testing ... (interrupt to exit)
Event: time 1325376099.794968, type 3 (Absolute), code 57 (ABS_MT_TRACKING_ID), value 0
Event: time 1325376099.794990, type 1 (Key), code 330 (Touch), value 1
Event: time 1325376099.794999, type 1 (Key), code 325 (ToolFinger), value 1
Event: time 1325376099.795009, type 3 (Absolute), code 53 (ABS_MT_POSITION_X), value 738
Event: time 1325376099.795018, type 3 (Absolute), code 54 (ABS_MT_POSITION_Y), value 1487
Event: time 1325376099.795027, type 3 (Absolute), code 58 (ABS_MT_PRESSURE), value 84
Event: time 1325376099.795036, type 3 (Absolute), code 48 (A