Android ViewModel会在配置更改时重新创建

Question

我有一个活动和几个片段。

的活动：

@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);
}

DI注射：

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

片段代码：

@Override
public BalanceViewModel setViewModel() {
    return ViewModelProviders.of(this, viewModelFactory).get(BalanceViewModel.class);
}

当我改变方向时记录：

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

所以，我的问题是每次改变方向时viewModels调用构造函数的原因？是否与DI相关？