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Android 计步器的一个demo

Android上实现计步功能,基本上都是基于加速度传感器传回的x,y,z三轴上的加速度,对其取平方和后再开方,得到三个空间向量的合向量的模。 在极其理想的状态下,这个值的变化情况应该是一个正弦或者余弦波,考虑到实际情况中有很多干扰的因素,噪声很多。这个问题的复杂就在于如何识别 这个极不规律的源源不断产生的波形中是否产生了有效的周期。

经测试,这个demo的精度还可以,欢迎使用。

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