WXMiniProgramObject miniProgramObj = new WXMiniProgramObject();
miniProgramObj.webpageUrl = "http://www.qq.com"; // 兼容低版本的网页链接
miniProgramObj.miniprogramType = WXMiniProgramObject.MINIPTOGRAM_TYPE_RELEASE;// 正式版:0，测试版:1，体验版:2
miniProgramObj.userName = "gh_d43f693ca31f"; // 小程序原始id
miniProgramObj.path = "/pages/media"; //小程序页面路径
WXMediaMessage msg = new WXMediaMessage(miniProgramObj);
msg.title = "小程序消息Title"; // 小程序消息title
msg.description = "小程序消息Desc"; // 小程序消息desc
msg.thumbData = getThumb(); // 小程序消息封面图片，小于128k

SendMessageToWX.Req req = new SendMessageToWX.Req();
req.transaction = buildTransaction("webpage");
req.message = msg;
req.scene = SendMessageToWX.Req.WXSceneSession; // 目前支持会话
api.sendReq(req);