【发布时间】：2021-06-27 02:31:38
【问题描述】：
我已经成功获得帖子，在前 10 个帖子中，我也获得了帖子内容，但是当我向下滚动以加载更多帖子时，我也可以看到带有特色图片的帖子，但是当我点击这些帖子时，我得到了这个错误：现在已经超过 2 周了，因为我找到了答案，请帮助
Caused by: java.lang.IndexOutOfBoundsException: Index: 11, Size: 10
at java.util.ArrayList.get(ArrayList.java:437)
at com.punjabidharti.myapplication.PostDetails.onCreate(PostDetails.java:30)
这是我的 PostDetails 活动：
Intent i = getIntent();
int position = i.getExtras().getInt("itemPosition");
Log.e("PostDetails ", "title is " + MainActivity.mListPost.get(position).getTitle().getRendered());
this.title = (TextView) findViewById(R.id.title);
title.setText(Html.fromHtml(MainActivity.mListPost.get(position).getTitle().getRendered()));
String data = String.valueOf((Html.fromHtml(MainActivity.mListPost.get(position).getContent().getRendered())));
WebView webview = (WebView)this.findViewById(R.id.postwebview);
webview.getSettings().setJavaScriptEnabled(true);
webview.loadData(data, "text/html; charset=utf-8", "UTF-8");
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;
total_types = dataset.size();
}
@Override
public int getItemCount() {
return dataset.size();
}
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);
//at the moment, it is displaying an icon for all posts
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 int getItemViewType(int position) {
return position;
}
@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 );
Glide.with(mContext)
.load(object.Image)
.dontAnimate()
.placeholder(R.drawable.icon)
.into(((ImageTypeViewHolder) holder).imageView);
( (ImageTypeViewHolder) 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);
}
});
( (ImageTypeViewHolder) 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);
}
});
( (ImageTypeViewHolder) holder).imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(mContext, PostDetails.class);
intent.putExtra("itemPosition", position);
mContext.startActivity(intent);
}
});
/// dataset.get(position)
}
@Override
public long getItemId(int position) {
return position;
}
这是我的 MainActivity：
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
progressBar = (ProgressBar) findViewById(R.id.progressbar);
mLayoutManager = new LinearLayoutManager(MainActivity.this, LinearLayoutManager.VERTICAL, false);
recyclerView.setLayoutManager(mLayoutManager);
list = new ArrayList<Model>();
getRetrofit();
adapter = new RecyclerViewAdapter( list, MainActivity.this);
recyclerView.setAdapter(adapter);
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
if (dy > 0) { //check for scroll down
visibleItemCount = mLayoutManager.getChildCount();
totalItemCount = mLayoutManager.getItemCount();
pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition();
if (loading) {
if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) {
loading = false;
Log.v("...", "Last Item Wow !");
// Do pagination.. i.e. fetch new data
getRetrofit();
adapter = new RecyclerViewAdapter( list, MainActivity.this);
recyclerView.setAdapter(adapter);
}
}
}
}
});
这是我在 mainactivity 中的改造：
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("size", list.size() + "");
System.out.println("The shortest word i is:" + 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("[…]", "");
list.add(new Model(Model.IMAGE_TYPE, response.body().get(i).getTitle().getRendered(),
tempdetails,
response.body().get(i).getImages().getMedium()));
adapter.notifyDataSetChanged();
}
progressBar.setVisibility(View.GONE);
} else {
progressBar.setVisibility(View.GONE);
}
}
@Override
public void onFailure(Call<List<WPPost>> call, Throwable t) {
}
});
}
最后：
public static List<WPPost> getList(){
return mListPost;
}
请帮忙，距离我找到答案已经超过 2 周了，请
我也试过这个方法：How to handle pagination/load more in Retrofit 2.0?
还有这个What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
【问题讨论】：
标签： android arraylist android-recyclerview retrofit2 onscrolllistener