如何获取罗盘方向
我想在屏幕上显示手机面向的方向。例如：
0
|- []
|_
South --- North
在上图中，手机将显示“北”。由于用户（头部带有 0 的棍子）将手机（图中的 []）指向北方。
我发现这个示例。我明白它在做什么，除了它似乎在计算偏航、俯仰、滚动和倾斜。这些是什么以及如何使用它们来简单地找到手机指向的方向？
还有这个 android 文档 提到 X、Y 和 Z 轴，但我没有看到任何地方说明这些轴如何与手机相对应？ Z是从手机底部到顶部吗？
I want to show the direction on the screen that phone is facing. For example:
0
|- []
|_
South --- North
In the above diagram the phone would display "North". Since the user (the stick with 0 for his head) is holding out the phone (the [] in the diagram) pointing north.
I found this example. I understand what it's doing except it seems to calculate yaw, pitch, roll, and inclination. What are those and how would I use them to simply find which way the phone is pointing?
Also this android documentation mentions X, Y, and Z axises but I don't see anywhere that says how those axises correspond to the phone? Is Z going from the bottom of the phone to the top?
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这就是轴（axiy？）的样子。
我找不到我使用的备忘单的链接，但它看起来有点像 这个。
总之，您想要注册以监听 Sensor.TYPE_ORIENTATION，从传入的值数组获取 value[0]，这应该会显示您的角度（我相信是从北）。
一些示例来自 *android.com
this is how the axis (axiy?) look like.
I couldn't find a link to the cheat sheet I use, but it looked sort of like this.
In summary, you want to register to listen for Sensor.TYPE_ORIENTATION, from the incoming array of values get, value[0] and that should show you your angle (from North I believe).
some example from *android.com