Question

我想用 json api 和 WordPress 作为后端制作应用程序。我可以获取帖子并且它可以正常工作直到第一页，当我点击每个帖子时，我也可以看到帖子详细信息，但是在下一页的帖子中，点击不起作用并且应用程序崩溃，我得到的错误是：

 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.punjabidharti.myapplication/com.punjabidharti.myapplication.PostDetails}: java.lang.IndexOutOfBoundsException: Index: 10, Size: 10

这是适配器...

 private ArrayList<Model> dataset;
private Context mContext;
int total_types;

public RecyclerViewAdapter(ArrayList<Model> mlist, Context context) {
    this.dataset = mlist;
    this.mContext = context;

}
public static class ImageTypeViewHolder extends RecyclerView.ViewHolder {

       TextView title, subtitle;
       ImageView imageView;

       public ImageTypeViewHolder (View itemView) {

           super(itemView);

           this.title = (TextView) itemView.findViewById(R.id.title);
           this.subtitle = (TextView) itemView.findViewById(R.id.subtitle);
           this.imageView = (ImageView) itemView.findViewById(R.id.icon);


       }
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.postdetails, parent, false);
    return new ImageTypeViewHolder(view);
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {

    final Model object = dataset.get(position);
    ( (ImageTypeViewHolder) holder).title.setText(object.title);
    ( (ImageTypeViewHolder) holder).subtitle.setText(object.subtitle);


    ( (ImageTypeViewHolder) holder).title.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent (mContext, PostDetails.class);
            intent.putExtra ("itemPosition", position);
            mContext.startActivity(intent);
        }
    });

    ( (ImageTypeViewHolder) holder).subtitle.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent (mContext, PostDetails.class);
            intent.putExtra ("itemPosition", position);
            mContext.startActivity(intent);

        }
    });

}



@Override
public int getItemViewType(int position) {
    return position;
}

@Override
public long getItemId(int position) {
    return position;
}

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

这就是我在滚动时加载下一页的方式..

 recyclerView.setOnScrollListener(new EndlessRecyclerOnScrollListener(mLayoutManager) {
        @Override
        public void onLoadMore(int current_page) {
            // do something...

            yourURL = "https://punjabidharti.com/wp-json/wp/v2/posts/?categories=4514&per_page=10&page=2";

           
            getRetrofit();
            


        }
    });

这就是我通过改造获取帖子的方式..

 public void getRetrofit(){
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(baseURL)
            .addConverterFactory(GsonConverterFactory.create())
            .build();
    RetrofitArrayApi service = retrofit.create(RetrofitArrayApi.class);
    String yourURl = yourURL.replace(baseURL,"");
    Call<List<WPPost>>  call = service.getPostInfo( yourURl);
    call.enqueue(new Callback<List<WPPost>>() {
        @Override
        public void onResponse(Call<List<WPPost>> call, Response<List<WPPost>> response) {
            Log.e("mainactivyt", " response "+ response.body());
            mListPost = response.body();
            progressBar.setVisibility(View.GONE);
            if (response.body() != null) {
                for (int i = 0; i < response.body().size(); i++) {
                    Log.e("main ", " title " + response.body().get(i).getTitle().getRendered() + " " +
                            response.body().get(i).getId());
                    String tempdetails = response.body().get(i).getExcerpt().getRendered().toString();
                    tempdetails = tempdetails.replace("<p>", "");
                    tempdetails = tempdetails.replace("</p>", "");
                    tempdetails = tempdetails.replace("[&hellip;]", "");
                    list.add(new Model(Model.IMAGE_TYPE, response.body().get(i).getTitle().getRendered(),
                            tempdetails,
                            response.body().get(i).getLinks().getWpFeaturedmedia().get(0).getHref()));
                }

                progressBar.setVisibility(View.GONE);
            } else {
                progressBar.setVisibility(View.GONE);
            }


            adapter.notifyDataSetChanged();
        }
        @Override
        public void onFailure(Call<List<WPPost>> call, Throwable t) {
        }
    });

Answer 1

将 Adapter 和 ArrayList 更改为 List。

public class ImageTypeViewHolder extends RecyclerView.Adapter<ImageTypeViewHolder.ViewHolder> {
    private List<Model> dataset;
    private Context mContext;
    int total_types;
    public ImageTypeViewHolder(List<Model> mlist, Context context) {
        this.dataset = mlist;
        this.mContext = context;

    }
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.postdetails, parent, false);
        return new ImageTypeViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.title.setText(dataset.get(position).getTitle());
        holder.subtitle.setText(dataset.get(position).getSubTitle());
        holder.title.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent (mContext, PostDetails.class);
                intent.putExtra ("itemPosition", position);
                mContext.startActivity(intent);
            }
        });
        holder.subtitle.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent (mContext, PostDetails.class);
                intent.putExtra ("itemPosition", position);
                mContext.startActivity(intent);
            }
        });
    }

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

    public  static class ViewHolder extends RecyclerView.ViewHolder{
        TextView title, subtitle;
        ImageView imageView;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            this.title = (TextView) itemView.findViewById(R.id.title);
            this.subtitle = (TextView) itemView.findViewById(R.id.subtitle);
            this.imageView = (ImageView) itemView.findViewById(R.id.icon);
        }
    }
}

Answer 2

试试这个

public class ImageTypeViewHolder extends RecyclerView.Adapter<ImageTypeViewHolder.ViewHolder> {
    private List<Model> dataset;
    private Context mContext;
    public ImageTypeViewHolder(List<Model> mlist, Context context) {
        this.dataset = mlist;
        this.mContext = context;

    }
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.postdetails, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.setData(dataset.get(position).getTitle(),dataset.get(position).getSubTitle());
    }

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

    class ViewHolder extends RecyclerView.ViewHolder{
        TextView title, subtitle;
        ImageView imageView;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            this.title = (TextView) itemView.findViewById(R.id.title);
            this.subtitle = (TextView) itemView.findViewById(R.id.subtitle);
            this.imageView = (ImageView) itemView.findViewById(R.id.icon);
        }
       private void setData(String title, String subtitle){
           this.title.setText(title);
           this.subtitle.setText(subtitle);
       }
       
       title.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent (mContext, PostDetails.class);
                intent.putExtra ("itemPosition", position);
                itemView.getContext().startActivity(intent);
            }
        });

       subtitle.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent (mContext, PostDetails.class);
                intent.putExtra ("itemPosition", position);
                itemView.getContext().startActivity(intent);
            }
        });
    }
}

向下滚动到新帖子时点击无效

2 个答案: