相关疑难解决方法(0)

我用空间实现了缓存但由于某种原因它被破坏了,要么它没有插入或者没有得到数据,我已经做了很多调试但是仍然没有任何线索......有人可以帮忙吗？那么,图片如下:

1. 主要活动

   mArticleViewModel = ViewModelProviders.of(this).get(ArticleViewModel.class);
   mArticleViewModel.getArticleList(mPageNumber).observe(this, articles 
   -> { /* doesn't matter */ });
   

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2. 视图模型

   public class ArticleViewModel extends AndroidViewModel {
   
       public static final String TAG = "ArticleViewModel";
       private LiveData<List<Article>> articleList;
       private ArticleRepository articleRepository;
   
       public ArticleViewModel(@NonNull Application application) {
           super(application);
           Log.d(TAG, "ArticleViewModel");
           if (articleRepository == null) {
               articleRepository = new ArticleRepository(application);
           }
       }
   
   
       public LiveData<List<Article>> getArticleList(int pageNumber) {
           Log.d(TAG, "getArticleList");
           articleList = articleRepository.getArticles();
           return articleList;
       }
   }
   

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   }

3. 知识库

   public class ArticleRepository {
           public static final String TAG = "ArticleRepository"; …

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