如何检测android设备平行于地面的旋转? [英] How to detect android device rotation parallel to the ground?

问题描述

据我所知，大多数android设备都允许通过加速度计检测旋转，但是我注意到，它无法检测到平行于地面的旋转.例如，如果我将设备放在桌子上并旋转，则加速度计指示器中的任何一个都不会改变.

As I know, the most of android devices allows to detect rotation by accelerometer, but I've noticed, that it doesn't detect rotation parallel to the ground. For example, if I put the device on a table and turn it around, no one of accelerometer indicators doesn't change.

在图片上，这称为阿尔法"旋转.那么我怎么能检测到这种转弯呢?

At the picture, it's called "alfa" rotation. So how can I detect this kind of turning?

推荐答案

要感知绕z轴的旋转，您需要实现一个指南针功能.不错的教程是此.为了使结果值更稳定，您需要实施一些算法，以平滑您的传入数据(对数据队列的平均值，过滤异常值等).这是一个很好的概述.

For sensing rotation around z-axis you need to implement a compass function. A good tutorial is this one. To make the resulting values more stable you need to implement some algorithm which smoothes your incoming data (averages over a queue of data, filtering outliers, etc.). Here is a good overview.

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