问java调用移动安全api的CreateShieldInstance加固后的apk怎么下载？

AppUrl无论填写本地还是七牛云的apk地址，CallbackUrl添空字符还是post，返回总是{"TaskStatus":3,"AppDetailInfo":{"AppName":"","AppPkgName":"com.airtalkee","AppVersion":"","AppSize":0,"AppMd5":"360c2b4a71f07d4f484ccdc075c0404d","AppIconUrl":"","FileName":"abc"},"ShieldInfo":{"ShieldCode":40109,"ShieldSize":0,"ShieldMd5":"","AppUrl":"","TaskTime":1560408633,"ItemId":"2b4d775e642624c57d88fcb9c5328769","ServiceEdition":"basic"},"StatusDesc":"下载应用失败","StatusRef":"请确认下载链接是否正确","RequestId":"c5f96d4d-9f5c-4f5b-9fb9-c6ab31f92cc4"}。

那些填写参数能够具体一些，加固后apk下载地址又在哪里？例子不够详细，无法成功调用。