public static void pay(Context context,int businessId,int price) {
    api = WXAPIFactory.createWXAPI(context, Constant.WE_CHAT_APP_ID);
    if (!api.isWXAppInstalled())
    {
        Toast.makeText(context, "尚未安装微信，请安装微信后重试!", Toast.LENGTH_SHORT).show();
    }else {
        WXLaunchMiniProgram.Req req = new WXLaunchMiniProgram.Req();
        req.userName = Constant.SMALL_PROGRAM_APP_ID; // 填小程序原始id
        req.path = String.format("pages/index/index?userId=%d&businessId=%d&price=%d", App.getInstance().userId,businessId,price);
        req.miniprogramType = WXLaunchMiniProgram.Req.MINIPTOGRAM_TYPE_RELEASE;// 可选打开 开发版，体验版和正式版
        api.sendReq(req);
    }

}