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POWhich device file receives keys which I inject on Android?
 

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  1. POWhich device file receives keys which I inject on Android?
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    <p>I managed to inject multitouch events on my LG device programmatically ( C code ) injecting them into <code>/dev/input/event0</code>. But no success with key press injection. I do able to inject keys via <code>adb shell input keyevent</code> but i don't see anything happens in <code>/dev/input/event*</code> files. Looks like none of them receives nothing. Does anybody know how to localize the file where to inject keys ? Thanks in advance.</p> <p>Update:</p> <p>init device code :</p> <pre><code>ioctl (obj-&gt;m_fd, UI_SET_EVBIT, EV_KEY); ioctl (obj-&gt;m_fd, UI_SET_KEYBIT, BTN_TOUCH); ioctl (obj-&gt;m_fd, UI_SET_KEYBIT, KEY_BACK); ioctl (obj-&gt;m_fd, UI_SET_KEYBIT, KEY_HOMEPAGE); for (i = KEY_RESERVED; i &lt;= KEY_UNKNOWN; i++) ioctl(obj-&gt;m_fd, UI_SET_KEYBIT, i); ioctl (obj-&gt;m_fd, UI_SET_EVBIT, EV_ABS); ioctl (obj-&gt;m_fd, UI_SET_ABSBIT, ABS_X); ioctl (obj-&gt;m_fd, UI_SET_ABSBIT, ABS_Y); ioctl (obj-&gt;m_fd, UI_SET_ABSBIT, ABS_MT_TOUCH_MAJOR); ioctl (obj-&gt;m_fd, UI_SET_ABSBIT, ABS_MT_POSITION_X); ioctl (obj-&gt;m_fd, UI_SET_ABSBIT, ABS_MT_POSITION_Y); ioctl (obj-&gt;m_fd, UI_SET_ABSBIT, ABS_MT_TRACKING_ID); ioctl (obj-&gt;m_fd, UI_SET_ABSBIT, ABS_MT_PRESSURE); </code></pre> <p>inject touch event code (working)</p> <pre><code>intSendEvent( obj-&gt;m_fd, EV_ABS, ABS_MT_TRACKING_ID, 0 ); intSendEvent( obj-&gt;m_fd, EV_ABS, ABS_MT_POSITION_X, obj-&gt;x ); intSendEvent( obj-&gt;m_fd, EV_ABS, ABS_MT_POSITION_Y, obj-&gt;y ); intSendEvent( obj-&gt;m_fd, EV_ABS, ABS_MT_TOUCH_MAJOR, obj-&gt;sq ); intSendEvent( obj-&gt;m_fd, EV_ABS, ABS_MT_PRESSURE, obj-&gt;pr ); intSendEvent( obj-&gt;m_fd, EV_SYN, SYN_MT_REPORT, 0); intSendEvent( obj-&gt;m_fd, EV_SYN, SYN_REPORT, 0); intSendEvent( obj-&gt;m_fd, EV_SYN, SYN_MT_REPORT, 0); intSendEvent( obj-&gt;m_fd, EV_SYN, SYN_REPORT, 0); </code></pre> <p>inject key press code where <code>KEY_RESERVED &lt;= obj-&gt;keyCode &lt;=KEY_UNKNOWN</code> (not working) </p> <pre><code>intSendEvent(obj-&gt;m_fd, EV_KEY, obj-&gt;keyCode, 1); intSendEvent( obj-&gt;m_fd, EV_SYN, SYN_REPORT, 0); intSendEvent(obj-&gt;m_fd, EV_KEY, obj-&gt;keyCode, 0); intSendEvent( obj-&gt;m_fd, EV_SYN, SYN_REPORT, 0); </code></pre> <p>send event function</p> <pre><code>void intSendEvent(int fd_kb,int type, int code, int value) { debug("intSendEvent call (%d,%d,%d,%d)", fd_kb, type, code, value); struct uinput_event event; int len; if (fd_kb &lt;= fileno(stderr)) return; memset(&amp;event, 0, sizeof(event)); event.type = type; event.code = code; event.value = value; len = write( fd_kb, &amp;event, sizeof(event) ); debug("intSendEvent done:%d",len); } </code></pre>
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      1. POWhich device file receives keys which I inject on Android?
      1. USrakar
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    1. COI believe getevent tells you the source, so if your run that from an adb shell session in one window, and then inject some events with input keyevent in another adb session, you might figure it out *for your particular device*
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      1. POWhich device file receives keys which I inject on Android?
      1. USChris Stratton
    2. COThis is exactly what i'm doing, and don't see something happens in getevent session when injecting keys.
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      1. POWhich device file receives keys which I inject on Android?
      1. USDabo
    3. COCan you provide an example of your injection command that others could try?
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      1. POWhich device file receives keys which I inject on Android?
      1. USChris Stratton
 

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