Java ViewModelProvider类代码示例

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
private void initViewModels(final String productId) {
  productViewModel = ViewModelProviders.of(this, new ViewModelProvider.Factory() {
    @SuppressWarnings("unchecked") @Override public <T extends ViewModel> T create(final Class<T> modelClass) {
      if (modelClass.equals(RealProductViewModel.class)) {
        return (T) new RealProductViewModel(productId);
      } else {
        return null;
      }
    }
  }).get(RealProductViewModel.class);
  productViewModel.productLiveData().observe(this, this::renderProduct);
  productViewModel.progressLiveData().observe(this, progress -> {
    if (progress != null) {
      swipeRefreshLayoutView.setRefreshing(progress.show);
    }
  });
  productViewModel.errorErrorCallback().observe(this.getLifecycle(), error -> {
    if (error != null) {
      showDefaultErrorMessage();
    }
  });
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
public static <T extends ViewModel> ViewModelProvider.Factory createFor(T model) {
    return new ViewModelProvider.Factory() {
        @Override
        public <T extends ViewModel> T create(Class<T> modelClass) {
            if (modelClass.isAssignableFrom(model.getClass())) {
                return (T) model;
            }
            throw new IllegalArgumentException("unexpected model class " + modelClass);
        }
    };
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@NonNull
private CountriesViewModel getViewModel() {
    CountriesService service = ApiClient.getCountriesService();
    CountryDao moviesDao = CountriesDatabase.getInstance(this).countryDao();
    ViewModelProvider.Factory factory = new CountriesViewModelProviderFactory(service, moviesDao);
    return ViewModelProviders.of(this, factory).get(CountriesViewModel.class);
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@PerFragment
@Provides
public LiveDataRowPresenter provideLiveDataRowPresenter(ViewModelProvider.Factory factory,
        DataLoadedListener activity) {
    LiveDataRowPresenter rowPresenter = new LiveDataRowPresenter(factory);

    rowPresenter.registerDataLoadedListener(activity);
    return rowPresenter;
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
private void initViewModels(final String collectionId) {
  ProductListViewModel listViewModel = ViewModelProviders.of(this, new ViewModelProvider.Factory() {
    @SuppressWarnings("unchecked")
    @Override
    public <T extends ViewModel> T create(final Class<T> modelClass) {
      if (modelClass.equals(ProductListViewModel.class)) {
        return (T) new ProductListViewModel(collectionId);
      } else {
        return null;
      }
    }
  }).get(ProductListViewModel.class);
  productListView.bindViewModel(listViewModel);
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Override
public void initViewModel(ViewModelProvider.Factory factory) {
    mViewModel = ViewModelProviders.of(this,factory).get(SoccerSeasonFragmentModel.class);
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Override
public void initViewModel(ViewModelProvider.Factory factory) {
    mViewModel = ViewModelProviders.of(this,factory).get(TeamFragmentModel.class);
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Binds
abstract ViewModelProvider.Factory bindViewModelFactory(ViewModelFactory factory);
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Binds
abstract ViewModelProvider.Factory bindViewModelFactory(ArchCompViewModelFactory factory);
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Provides
@Singleton
ViewModelProvider.Factory provideViewModelFactory(ListItemRepository repository){
    return new CustomViewModelFactory(repository);
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Binds
abstract ViewModelProvider.Factory bindViewModelFactory(GithubViewModelFactory factory);
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Provides
@Singleton
ViewModelProvider.Factory provideViewModelFactory() {
    return new ViewModelProvider.NewInstanceFactory();
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Provides
@Singleton
ViewModelProvider.Factory provideViewModelFactory(ViewModelSubComponent.Builder builder){
    return new PhotoViewModelFactory(builder.build());
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Provides
ViewModelProvider.Factory mainViewModelProvider(MainViewModel mainViewModel) {
    return new ViewModelProviderFactory<>(mainViewModel);
}
 

import android.arch.lifecycle.ViewModelProvider; //导入依赖的package包/类
@Provides
ViewModelProvider.Factory provideBlogViewModel(BlogViewModel blogViewModel) {
    return new ViewModelProviderFactory<>(blogViewModel);
}