如果您使用ProGuard，则必须编辑 proguard-rules.pro

If you use ProGuard you must edit proguard-rules.pro

将此行添加到结尾. 模型文件夹中的我的SugarRecords"(模型).

Add this line to end. My SugarRecords ( models ) in models folder.

-keep class com.username.appname.models.** { *; }

并在Android Studio中禁用即时运行功能. 我为SugarORM安装编写了一个教程这里

And disable Instant Run function in Android Studio. I wrote a tutorial for SugarORM installation here