Cordova振动插件无法正常工作

Question

我已尝试过我的设备没有静音但振动插件似乎无法正常工作：

 (function () {
    "use strict";

    document.addEventListener( 'deviceready', onDeviceReady.bind( this ), false );

    function onDeviceReady() {

        // Handle the Cordova pause and resume events
        document.addEventListener( 'pause', onPause.bind( this ), false );
        document.addEventListener( 'resume', onResume.bind( this ), false );
        document.getElementById("vibrate").addEventListener("click", vibrate);
        document.getElementById("vibrationPattern").addEventListener("click", vibratePattern);
        // TODO: Cordova has been loaded. Perform any initialization that requires Cordova here.
        var parentElement = document.getElementById('deviceready');
        var listeningElement = parentElement.querySelector('.listening');
        var receivedElement = parentElement.querySelector('.received');
        listeningElement.setAttribute('style', 'display:none;');
        receivedElement.setAttribute('style', 'display:block;');

    };


    function vibrate()
    {
        var time = 3000;
        navigator.vibrate(time);
        alert('vibrate(v1) ');
    }
    function vibratePattern()
    {
        var pattern = [1000, 1000, 1000, 1000, 1000];
        navigator.vibrate(pattern);
        alert('Pattern');
    }
})();

/////////////////////////////////////////////// ///////////////////////////////// HTML /////////////

<button id="vibrate">VIBRATION</button>
<button id="vibratePattern">PATTERN</button>