android - 无法解析 Libgdx 应用程序。SuperJumper 类型的层次结构不一致

Question

我正在尝试遵循本教程： http ://appwarp.shephertz.com/game-development-center/java-multiplayer-libgdx-tutorial/#what-are-we-going-to-do

但是，当我将项目克隆到我的计算机中并替换密钥（甚至之前）时，SuperJumperAndroid.java 中会出现此问题：

Multiple markers at this line
- The type com.badlogic.gdx.Application cannot be resolved. It is indirectly  
referenced from required .class files

- The hierarchy of the type SuperJumperAndroid is inconsistent

和

The type com.badlogic.gdx.Application cannot be resolved. 
It is indirectly referenced from required .class files

快速修复说我应该更新构建路径但是我真的不知道要更新什么。

任何帮助将不胜感激：D在此先感谢