Java Android ViewModel在配置更改时重新创建

我有一个活动和一些片段

活动：

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    performInjection();
    performDataBinding();
}

private void performDataBinding() {
    viewDataBinding = DataBindingUtil.setContentView(this, setLayoutId());
    this.viewModel = viewModel == null ? onCreateViewModel() : viewModel;
    viewDataBinding.setVariable(setBindingVariable(), viewModel);
    viewDataBinding.executePendingBindings();
}
@Override
public MainViewModel onCreateViewModel() {
    return ViewModelProviders.of(this, viewModelFactory).get(MainViewModel.class);
}

去离子注入：

@Provides
ViewModelProvider.Factory mainViewModelProvider(MainViewModel mainViewModel) {
    return new ViewModelProviderFactory<>(mainViewModel);
}

并在我更改方向时记录：

D/BalanceViewModel: Recreation / constructor
D/MainViewModel: Recreation / constructor
D/BalanceViewModel: Recreation / constructor
D/BalanceViewModel: Recreation / onCleared

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所以，我的问题是为什么每次我改变方向时viewModels都会调用构造函数？它是否与DI连接

找到解决办法了吗？

D/BalanceViewModel: Recreation / constructor
D/MainViewModel: Recreation / constructor
D/BalanceViewModel: Recreation / constructor
D/BalanceViewModel: Recreation / onCleared