android - 回收站 View : No adapter attached

Question

我知道这个问题已经被问过了，但是看了答案，我还是想不出解决办法。这是我的适配器:

 public static class StarredReposViewHolder extends RecyclerView.ViewHolder {
    LinearLayout starredReposLayout;
    TextView starredRepoName;

    public StarredReposViewHolder(View v) {
        super(v);
        starredReposLayout = (LinearLayout) v.findViewById(R.id.repo_starred_item_layout);
        starredRepoName = (TextView) v.findViewById(R.id.starredepoName);
    }
}

public StarredReposAdapter(List<GitHubstarredRepos> repos, int rowLayout, Context context) {
    this.starredRepos = repos;
    this.rowLayout = rowLayout;
    this.context = context;
}

@Override
public StarredReposAdapter.StarredReposViewHolder onCreateViewHolder(ViewGroup parent,
                                                       int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(rowLayout, parent, false);
    return new StarredReposViewHolder(view);
}


@Override
public void onBindViewHolder(StarredReposViewHolder holder, int position) {
    holder.starredRepoName.setText(starredRepos.get(position).getStarredName());
}

@Override
public int getItemCount() {
    return starredRepos.size();
}

这是我加载它的方法:

 public void loadStarredRepos (View view){

    final RecyclerView recyclerViewSt = (RecyclerView) findViewById(R.id.starred_repos_recycler_view);
    recyclerViewSt.setLayoutManager(new LinearLayoutManager(this));

    GitHubStarredRepoAPI apiService =
            ApiClient.getClient().create(GitHubStarredRepoAPI.class);

    Call<List<GitHubstarredRepos>> call = apiService.getStarredRepoName(newString);
    call.enqueue(new Callback<List<GitHubstarredRepos>>() {
        @Override
        public void onResponse(Call<List<GitHubstarredRepos>> call, Response<List<GitHubstarredRepos>>
                response) {

            recyclerViewSt.setAdapter(new StarredReposAdapter(response.body(), R.layout.list_item_starred_repo,
                    getApplicationContext()));
        }

        @Override
        public void onFailure(Call<List<GitHubstarredRepos>> call, Throwable t) {
            // Log error here since request failed
            Log.e("Repos", t.toString());
        }

    });

}

onResponse 的正文输入正确。问题不可能是它是在 onCreate 中定义的，因为我在同一屏幕上有另一个回收 View ，是从不同的方法加载的。谢谢!

PS:response.body()的响应

Answer 1

好吧，从实践来看，你应该在 #onCreate() 的 mainThread 中有你的 RecyclerView#setAdapter()


public void onCreate() {
recyclerViewSt.setAdapter(myAdapter);
}


您需要在 onResponse() 内部更新的是用于为适配器提供数据的数据集。

您可以将 response.body() 提取到 Activity 中的全局变量中，它返回一个对象数组(List repos)。喜欢:


List<GitHubstarredRepos> myDatasource = new ArrayList<>();


然后使用它:


myAdapter = new StarredReposAdapter(myDatasource, R.layout.list_item_starred_repo, getApplicationContext()));


接下来，网络调用的回调里面:


onResponse(response) {
myDatasource.clear();
myDatasource.addAll(response.body());
myRecyclerview.notifyDatasetChanged();
}
瞧，我的伪代码，不确定语法；)