java - 使用 ParseRecyclerQueryAdapter

Question

我希望有人能帮助我指明使用 ParseRecyclerQueryAdapter 的正确方向。我正在尝试使用实现标准 RecyclerView 的当前适配器类检索文章。我的分页实现无法正常工作，所以我希望任何使用 ParseRecyclerQueryAdapter 实现以下目标的人都能进行演示。通过从我那里翻译它，所以我得到了实现。

public class ArticleRVAdapter extends RecyclerView.Adapter {

List<Article> articleData = Collections.emptyList();
private LayoutInflater inflater;
private Context context;

public ArticleRVAdapter(Context context, List<Article> data){
    inflater=LayoutInflater.from(context);
    this.articleData= data;
    this.context = context;
}

@Override
public ArticleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View view = inflater.inflate(R.layout.article_item, parent, false);
    ArticleViewHolder viewHolder = new ArticleViewHolder(view);
    return viewHolder;
}

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

public class ArticleViewHolder extends RecyclerView.ViewHolder
        implements View.OnClickListener {

    CardView cardView;
    TextView title;
    TextView body;
    Date dateCreated;
    TextView author;
    ImageView headImage;
    String objectId;

    public ArticleViewHolder(final View itemView) {
        super(itemView);
        itemView.setClickable(true);
        itemView.setLongClickable(true);
        itemView.setOnClickListener(this);


        cardView = (CardView) itemView.findViewById(R.id.card_article);
        title = (TextView) itemView.findViewById(R.id.text_title);
        body = (TextView) itemView.findViewById(R.id.text_article_body);
        //dateCreated = itemView.findViewById(R.id.text_article_body);
        author = (TextView) itemView.findViewById(R.id.text_author);
        headImage = (ImageView) itemView.findViewById(R.id.imageView_thumb);


    }
    @Override
    public void onClick(View v) {
        Intent intent = new Intent(v.getContext(), ArticleInformationActivity.class);
        intent.putExtra("article_id", articleData.get(getLayoutPosition()).getObjectId());
        intent.putExtra("article_title", articleData.get(getLayoutPosition()).getArticleTitle());
        intent.putExtra("article_body", articleData.get(getLayoutPosition()).getArticleBody());
        intent.putExtra("article_author", articleData.get(getLayoutPosition()).getArticleAuthor());
        intent.putExtra("article_date", articleData.get(getLayoutPosition()).getDateCreated());
        v.getContext().startActivity(intent);

    }
}

Answer 1

经过大量测试，在我的项目中得到了解决方案:

fragment (或 Activity ):

private RecyclerView mRecyclerView;
private MyQueryAdapter myQueryAdapter;
private SwipeRefreshLayout swipeRefreshLayout;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.list_fragment, container, false);
        mRecyclerView = (RecyclerView) view.findViewById(R.id.rv);
        myQueryAdapter = new MyQueryAdapter(true);

        mRecyclerView.setAdapter(myQueryAdapter);

        mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        myQueryAdapter.addOnQueryLoadListener(new ParseRecyclerQueryAdapter.OnQueryLoadListener<MY_MODEL>() {
            @Override
            public void onLoaded(List<MY_MODEL> objects, Exception e) {
                if (swipeRefreshLayout.isRefreshing()) {
                    swipeRefreshLayout.setRefreshing(false);
                }
            }

            @Override
            public void onLoading() {
                if (!swipeRefreshLayout.isRefreshing()) {
                    swipeRefreshLayout.setRefreshing(true);
                }

            }
        });



        swipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_container);
        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                myQueryAdapter.loadObjects();
            }
        });


        return view;
    }

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

    @Override
    public void onResume() {
        super.onResume();
        myQueryAdapter.loadObjects();
    }

适配器

public class MyQueryAdapter extends ParseRecyclerQueryAdapter<MY_MODEL, MyQueryAdapter.MyViewHolder>{


    public MyQueryAdapter(boolean hasStableIds) {
        super(MY_MODEL.class, hasStableIds);
    }

public MarcacionesAdapter(ParseQueryAdapter.QueryFactory<Marcaciones> factory, boolean hasStableIds) {
        super(factory, hasStableIds);
    }



    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardview, parent, false);
        MyViewHolder myViewHolder = new MyViewHolder(v);
        return myViewHolder;
    }

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

        MY_MODEL model = getItem(position);
        holder.name.setText(model.getName());
        holder.year.setText(model.getYear());

    }

    public static class MyViewHolder extends RecyclerView.ViewHolder {
        CardView cv;
        TextView name;
        TextView year;

        MyViewHolder(View itemView) {
            super(itemView);
            cv = (CardView)itemView.findViewById(R.id.card_view);
            name = (TextView)itemView.findViewById(R.id.name);
            year = (TextView)itemView.findViewById(R.id.year);
        }
    }

}

如果你想配置一个自定义查询，你可以这样做:

       factory =
                new ParseQueryAdapter.QueryFactory<MY_MODEL>() {
                    public ParseQuery< MY_MODEL > create() {

                        ParseQuery<MY_MODEL> query = MY_MODEL.getQuery();
                        query.include("user");

                        //Filter by date
                        query.whereGreaterThan("createdAt", midnight);
                        query.whereLessThan("createdAt", now);

                        query.orderByDescending("createdAt");


                        return query;
                    }
                };

        adapter = new MyQueryAdapter(factory, true);