入门支持的触摸点的数目 [英] Getting the number of touch points supported

问题描述

我知道，支持触摸点的数量从设备到设备的不同，但有没有办法通过API或通过code拿到这个数字的设备？

I know that the number of touch points supported is different from device to device, but is there a way through the API or through code to get that number for the device?

推荐答案

您可以多点触控的各个大类区分（无，捏手势而已，真正的2点多点触摸，真正的5点多点触控），通过搜索结果<一href="http://developer.android.com/reference/android/content/pm/PackageManager.html#getSystemAvailableFeatures%28%29"相对=nofollow> PackageManager＃getSystemAvailableFeatures（）列出的各种android.hardware.touchscreen。*功能的此处。

You can distinguish between various broad classes of multitouch (none, pinch gestures only, true 2-point multitouch, true 5-point multitouch) by searching the result of PackageManager#getSystemAvailableFeatures() for the various "android.hardware.touchscreen.*" features listed here.

如果你想知道究竟有多少接触可能是present，你就得看MotionEvents，因为他们进来了。

If you want to know exactly how many touches may be present, you'll just have to watch MotionEvents as they come in.

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