不推荐使用“ViewModelProviders”。 Java解决方案？

Question

'ViewModelProviders' is deprecated from androidx.lifecycle:lifecycle-*:2.2.0-alpha03 https://developer.android.com/jetpack/androidx/releases/lifecycle#2.2.0-alpha03 Here is solution for Kotlin 'ViewModelProviders' is deprecated. After upgrading lifecycle-extensions:2.1.0 to 2.2.0-alpha05 But what is Java version of that? ViewModelProvider(this).get(MyViewModel.class) not work for Java.

Answer 1

ViewModelProviders.of(this).get(MyViewModel.class); - deprecated

new ViewModelProvider(this).get(MyViewModel.class); - correct

Thanks @EpicPandaForce !

Answer 2

Generic Example (up to android.arch.lifecycle:extensions:1.1.0). it is deprecated from 1.1.1,

MyViewModel myViewModel = new ViewModelProviders.of(this, new MyViewModelFactory(this.getApplication(), "Your string parameter")).get(MyViewModel.class);

Generic Example (for android.arch.lifecycle:extensions:1.1.1)

MyViewModel myViewModel = new ViewModelProvider(this, viewModelFactory).get(MyViewModel.class);

OR, Use ViewModelStore link

MyViewModel myViewModel = new ViewModelProvider(getViewModelStore(), viewModelFactory).get(MyViewModel.class);

Answer 3

您还可以为您的 ViewModel 创建一个 CREATOR 对象，并从您的活动中调用这个对象，这个对象将作为一个工厂对象，您可以在调用任何 ViewModelFactory 时调用它。

ViewModelProviders.of(this, ViewModelFactoryObject).get(ViewModel::class.java).apply{}