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Make sure your view Model class is publicMake sure your view model class constructor is publicMake sure you have added the dependency in your gridle file for lifecycle also if you use room and other...

通过 Activity 获取 ViewModel 时遇到的坑:在 Application.ActivityLifecycleCallbacks 中的 onActivityCreated 方法中获取 ViewModel 时, Activity 每重建一次, 获取的 ViewModel 都是重新构建后的新实例, 并不能让 ViewModel 以及 ViewModel 中的数据幸免于 Activity...