cordova插件-Device Orientation

    var watchID;
    function getCurrent () {

        navigator.compass.getCurrentHeading(onSuccess, onError);
    }

    function onSuccess(heading) {
        alert('Heading: ' + heading.magneticHeading);
    };

    function onError(error) {
        alert('CompassError: ' + error.code);
    };

////////////////////////////////////////////////////////////////////////////

    function watchH() {
        var options = {
            frequency: 3000
        }; // Update every 3 seconds

         watchID = navigator.compass.watchHeading(onSuccess, onError, options);
    }


    ///////////////////////////////////////////////////////////////////////

    function clearW() {

        navigator.compass.clearWatch(watchID);
    }