用H5实现手机摇一摇的实例详解

var SHAKE_THRESHOLD = xxx;

var last_up

date

 = 0;

var x, y, z, last_x, last_y, last_z;

function deviceMotionHandler(eventData) {

var acceleration =eventData.accelerationIncludingGravity;

var cur

Time

 =

new

Date().getTime();

if ((curTime - lastUpdate)> 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) {

alert("shaked!");

}

last_x = x;

last_y = y;

last_z = z;

}

}