cordova插件-Device Motion

var watchID;
function  getCurrentAcceleration() {
    navigator.accelerometer.getCurrentAcceleration(onSuccess, onError);
}

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

    watchID = navigator.accelerometer.watchAcceleration(onSuccess, onError, options);
}
function clearWa() {
    navigator.accelerometer.clearWatch(watchID);

}
function onSuccess(acceleration) {
    alert('Acceleration X: ' + acceleration.x + '\n' +
            'Acceleration Y: ' + acceleration.y + '\n' +
            'Acceleration Z: ' + acceleration.z + '\n' +
            'Timestamp: '      + acceleration.timestamp + '\n');
}

function onError() {
    alert('onError!');
}