Adb Shell getevent方法在Nexus 4上返回X和Y值的两倍 [英] Adb shell getevent method returns twice the value for X and Y on Nexus 4

问题描述

我目前正在尝试通过adb shell的 sendevent 命令生成复杂的手势。为了重播手势，我通过adb的 getevent 方法记录了事件。这是我的Nexus 4屏幕右下角的一个简单点击示例。

I am currently trying to generate a complex gesture via the sendevent command of adb shell. In order to replay a gesture, I recorded the events via the getevent method of adb. Here is a sample of a simple tap on the bottom right of my Nexus 4 screen.

/dev/input/event2: 0003 0039 00000059
/dev/input/event2: 0003 0035 000005ff
/dev/input/event2: 0003 0036 000008e6
/dev/input/event2: 0003 003a 0000002d
/dev/input/event2: 0000 0000 00000000
/dev/input/event2: 0003 0039 ffffffff
/dev/input/event2: 0000 0000 00000000

转换为十进制值（对于 sendevent 方法），它使：

Converted into decimal values (for the sendevent method), it makes:

/dev/input/event2: 3 57 89
/dev/input/event2: 3 53 1535
/dev/input/event2: 3 54 2278
/dev/input/event2: 3 58 45
/dev/input/event2: 0 0 0
/dev/input/event2: 3 57 -1
/dev/input/event2: 0 0 0

如您所见，X的值（例如，第2行的53代码）为1535，Y的值（第3行的代码54）为2278。

As you can see, the value for X (ie the 53 code on line 2) is 1535 and the value for Y (the code 54 on line 3) is 2278.

作为我的Nexus，这怎么可能4屏幕尺寸仅为768 * 1 280？与实际大小相比，它似乎要乘以2。。。如果我在Nexus 5上做同样的事情，就不会发生这种情况。

How can this be possible, as my Nexus 4 screen size is only of 768*1280 ? It seems to be multiplied by a factor 2 comparing to the actual size... This is not happening when I do the same thing on a Nexus 5.

感谢帮助这一点，它使我发疯！ ^^

Thanks for the help on this one, it drives me crazy ! ^^

推荐答案

这些是 input 设备（即触摸屏）的坐标。触摸屏是一个单独的设备，其分辨率可能与显示屏不同。

Those are input device (i.e. touch screen) coordinates. Touch screen is a separate device which may have a different resolution from the display.

要检查触摸屏的分辨率，请执行

To check the resolution of your touch screen do

getevent -il /dev/input/event2 | grep ABS_MT_POSITION

并查看 max 值

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