Cannot access ‘androidx.lifecycle.HasDefaultViewModelProviderFactory‘ which is a supertype of ‘com.e

Cannot access ‘androidx.lifecycle.HasDefaultViewModelProviderFactory’ which is a supertype of ‘com.example.a19.MainActivity’. Check your module classpath for missing or conflicting dependencies

今天创建了个项目，突然出现了这样的问题，怎么处理都没用，网上找了一堆没发现答案，故此记录。

增加这个依赖到你的build即可解决。

implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'