How to use fake data to test RecyclerView?

Question

I made my DataFakeGenerator to create some fake data to test my Recycelerview, but when i want to use it in one of my Fragments i have an error. My error is in this line:

 PostAdapter postAdapter = new PostAdapter(DataFakeGenerator.getData(this));

it says that i can not use this, so what statement can i use in this parentheses?

Here is my Fragment :

public class Frag_joke extends Fragment {


    public  static Fragment instance(){
        Fragment fragment = new Frag_joke();
        return fragment;
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {


        ViewGroup layout = (ViewGroup)inflater.inflate(R.layout.frag_joke,null);
        RecyclerView recyclerView = (RecyclerView)layout.findViewById(R.id.recycler_view);
        PostAdapter postAdapter = new PostAdapter(DataFakeGenerator.getData(this));
        recyclerView.setLayoutManager(new LinearLayoutManager(this.getActivity()));
        recyclerView.setAdapter(postAdapter);

       return layout;

    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
    }
}

Here is my DataFakeGenerator :

public class DataFakeGenerator {
    public static List<Post> getData(){
        List<Post> posts= new ArrayList<>();
        for(int i=0;i<=6;i++){
            Post post= new Post();
            post.setId(i);
            post.setContent("sample text");
            posts.add(post);
        }

        return posts;
    }
}

And here is my PostAdapter:

public class PostAdapter extends RecyclerView.Adapter<PostAdapter.PostViewHolder>{

    private Context context;
    private List<Post> posts;

    public PostAdapter(Context context, List<Post>posts){

        this.context = context;
        this.posts = posts;
    }

    @Override
    public PostViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.layout_post,parent,false);
        return new PostViewHolder(view);
    }

    @Override
    public void onBindViewHolder(PostViewHolder holder, int position) {

        Post post=posts.get(position);
        holder.content.setText(post.getContent());
    }

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

    public class PostViewHolder extends RecyclerView.ViewHolder{


        private TextView content;

        public PostViewHolder(View itemView) {
            super(itemView);
            content=(TextView)itemView.findViewById(R.id.post_content);
        }
    }
}

Answer 1

You are probably confused with your implementation. DataFakeGenerator.getData() does not need any parameter. It's your adapter constructor that has 2.

To create your adapter you can use the following instead: PostAdapter postAdapter = new PostAdapter(getContext(), DataFakeGenerator.getData());

PS: this wouldn't work with the adapter creation (if that's the code you are actually trying to use), as the Fragment is not a context (but the Activity is, which is why you can access it with getContext() from the fragment