function sharkingFn(obj, callback) {
if (window.DeviceMotionEvent) {
window.addEventListener('devicemotion', deviceMotionHandler, false);
}
var SHAKE_THRESHOLD = 5000; // 灵敏度
var last_update = 0;
var x, y, z, last_x = 0, last_y = 0, last_z = 0;
function deviceMotionHandler(eventData) {
var acceleration = eventData.accelerationIncludingGravity;
var curTime = new Date().getTime();
if ((curTime - last_update) > 100) {
var diffTime = curTime - last_update;
last_update = curTime;
x = acceleration.x;
y = acceleration.y;
z = acceleration.z;
var speed = Math.abs(x + y + z - last_x - last_y - last_z) / diffTime * 10000;
if (speed > SHAKE_THRESHOLD) {
callback();
}
last_x = x;
last_y = y;
last_z = z;
}
}
}
重力感应获取(摇一摇)
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