アクティビティの投稿

// アクティビティの投稿
function postActivity(title, body) {
    var params = {};
    params[opensocial.Activity.Field.TITLE] = title;
    params[opensocial.Activity.Field.BODY]  = body;
    var activity = opensocial.newActivity(params);
    opensocial.requestCreateActivity(
        activity, opensocial.CreateActivityPriority.LOW);
}