您应该加上行为的请求参数：

You should add "actions" to the request parameters:

JSONStringer actions;
try {
    actions = new JSONStringer().object()
                .key("name").value("Click me!")
                .key("link").value("http://***.com/").endObject();
     params.putString("actions", actions.toString());
} catch (JSONException e) {
    e.printStackTrace();
}