如何忽略“避免片段中的非默认构造函数”错误？

I got this error while trying to generate the signed APK. The thing is, my app is able to run and debug normally on my device. I don't know why when I try to generate APK, this error came out. How to ignore this error and generate the signed APK? I am using Android Studio 1.2.1.1 for Mac.I got this error while trying to generate the s