Android加速度計角度計算

Question

任何人都可以提供任何想法來計算指南針應旋轉角度指向加速度計x，y，z值重力方向？

Answer 1

我認爲X應該是0，y應該是正值，而z接近0則指南針指向地球。 （這意味着手機保持垂直）。

一般而言，從0角，指南針角應該是這樣

float accelerometerMaxRange = 10; // This is NOT right, but it's a good value to work with 
float newAngle = 0; 
if (z > 9) { 
    // Phone is horizontally flat, can't point towards gravity, really. Do whatever you think is right 
} else { 
    newAngle = (float)(x * 90/accelerometerMaxRange); 
    if (y < 0) { 
     newAngle = 180 - newAngle; 
    } 
}