在/dev/input/eventX中写入事件需要什么命令? [英] What are the commands needed to write events in /dev/input/eventX?

问题描述

我正在开发一个 android 应用，该应用需要将触摸事件发送到/dev/input/eventX.我知道执行以下操作的C代码结构如下:

I'm developing an android app that needs to send touch events to /dev/input/eventX. I know the C code structure to do such a thing is the following:

struct input_event {
    struct timeval time;
    unsigned short type;
    unsigned short code;
    unsigned int value;
};

要使用这样的代码，我需要设置 NDK .相反，我想在Android中使用Runtime.getRunTime.exec ()运行等效的linux命令，而无需使用NDK.有什么办法吗?

To use such a code, I need to set NDK. Instead, I want to run equivalent linux commands using Runtime.getRunTime.exec () in android without the need to use NDK. Is there any way to do that?

如果否，发送事件所需的其余C代码是什么?例如，如何将x = 200和y = 300的触摸事件发送到event0?我进行了搜索，但没有找到明确的解决方案.

If no, what are the rest of C code needed to send an event? For example, how can I send a touch event at x=200 and y=300 to event0? I searched and I didn't find a clear solution.

谢谢.

推荐答案

我不清楚您为什么需要直接向/dev/input/eventX发送事件.但是，如果它可以通过adb发送，则可以向设备注入许多类型事件.

I'm not clear about why you need to send event to /dev/input/eventX directly. But if it can send via adb, you can inject many type events to device.

在您的计算机上尝试:

adb shell input tap 200 300

或者在您的android设备外壳上:

Or this on your android device shell:

input tap 200 300

但是由于外部注入，它具有很高的延迟.

But it has a high delay because of outside injection.

有关input命令的更多信息，请参见此处.

More info about input command see here.

Usage: input [<source>] <command> [<arg>...]

The sources are: 
      mouse
      keyboard
      joystick
      touchnavigation
      touchpad
      trackball
      stylus
      dpad
      touchscreen
      gamepad

The commands and default sources are:
      text <string> (Default: touchscreen)
      keyevent [--longpress] <key code number or name> ... (Default: keyboard)
      tap <x> <y> (Default: touchscreen)
      swipe <x1> <y1> <x2> <y2> [duration(ms)] (Default: touchscreen)
      press (Default: trackball)
      roll <dx> <dy> (Default: trackball)

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