HTML 5 Implementation of the phone shake a shake

Since the deviceorientation of HTML 5 has been developed, many developers have started to study their features and have developed applications such as shaking, pedometer, and so on. Small series recently Idle bored, also developed a shake a shake Web application, interested in small partners can experience.

Sweep code Access

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Technical Analysis

(1) deviceorientation

Deviceorientation is one of the most important features of HTML 5, which provides an advanced encapsulation of the underlying directional sensor and motion sensor, providing support for DOM two events:

1. Deviceorientation: It encapsulates the data event of the directional sensor, which can obtain direction data in the stationary state of the mobile phone, such as the tilt angle and direction of the phone.

2. Devicemotion: It encapsulates data events of motion sensors and can obtain data such as motion acceleration during mobile phone movement.

Through these two events, we were able to obtain data such as gravity sensing, compass direction, etc. of the mobile phone, and then use the data to do some interesting things. For example, the gravity-sensing ball on a cell phone is using deviceorientation.

Deviceorientation API Events

Monitor Mobile Events

if (window. Devicemotionevent) { Window.addeventlistener (' devicemotion ', Devicemotionhandler, false); }

get acceleration of gravity

function Devicemotionhandler (eventData) { var acceleration =eventdata.accelerationincludinggravity; }

(2) Several considerations for confirming the user's shaking the phone:

1. Most users shake the phone with a main direction.

2. In the process of shaking the phone acceleration data in the x, Y, z direction data will definitely change.

3. The normal mobile phone movement process cannot be misjudged. For example, the mobile phone in the pocket, when walking, the acceleration data will also change.

Therefore, the process of calculating the mobile phone is not only to calculate the change in the speed of the mobile phone in x, Y, z three, the time interval, but also the speed of the change in the fixed time interval to trigger the event.

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Source is hosted on GitHub

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HTML 5 Implementation of the phone shake a shake