使用 google Picker 选择文件夹

Currently not let me select them,now only enter into that directory. I am using this code:

    function MenuCtrl($scope, $location, appId) {
    var onFilePicked = function (data) {
        $scope.$apply(function () {
            if (data.action == 'picked') {
                var id = data.docs[0].id;
                $location.path('/edit/' + id);
            }
        });
    };
    $scope.open = function () {
        var view = new google.picker.View(google.picker.ViewId.FOLDERS);
        view.setMimeTypes('application/vnd.google-apps.folder');

        var picker = new google.picker.PickerBuilder()
            .setAppId(appId)
            .addView(view)
            .setCallback(angular.bind(this, onFilePicked))
            .build();
        picker.setVisible(true);


    };
    $scope.create = function () {
        this.editor.create();
    };
    $scope.save = function () {
        this.editor.save(true);
    }
}

我怎样才能在不进入的情况下获得选定的文件夹?