In the adapter, I transfer the opening of pictures in the ViewPager, but only one fails, only those news in which 10 or more pictures are open, and all the rest work without questions !!! help fix ??

public class PostAdapter extends RecyclerView.Adapter<PostAdapter.PostViewHolder> { private LayoutInflater mInflater; private int mShowStyle; VKPostArray obj; VKApiPost p; VKApiPhoto vkPhoto; ArrayList<String> imgUrls1; VKApiUser mainUser; Context ctx; public PostAdapter(Context context, VKPostArray posts, VKApiUser user, int showStyle) { super(); this.obj = posts; this.mainUser = user; this.mInflater = LayoutInflater.from(context); this.mShowStyle = showStyle; } @Override public void onBindViewHolder(PostViewHolder holder, int position) { p = obj.get(position); holder.textPost.setText(p.text); holder.textlikePost.setText(" " + p.likes_count); holder.textrepostPost.setText(" " + p.reposts_count); SimpleDateFormat format = new SimpleDateFormat("dd.MM.yyyy HH:mm"); holder.textDatePost.setText(format.format(new java.util.Date(p.date * 1000))); VKAttachments att = new VKAttachments(); att = p.attachments; int i; imgUrls1 = new ArrayList<>(); try { for (i = 0; i <= att.size(); i++) { vkPhoto = (VKApiPhoto) att.get(i); imgUrls1.add(vkPhoto.photo_604); } } catch (Exception e) { holder.mNglContent.setImagesData(imgUrls1); } } @Override public int getItemCount() { return obj.size(); } @Override public PostViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { if (mShowStyle == NineGridImageView.STYLE_GRID) { return new PostViewHolder(mInflater.inflate(R.layout.recycler_item_wall, parent, false)); } else { return new PostViewHolder(mInflater.inflate(R.layout.recycler_item_wall, parent, false)); }} public class PostViewHolder extends RecyclerView.ViewHolder { CardView cv; TextView textPost, news_name, textDatePost, textrepostPost, textlikePost; ImageView like, repost ; NineGridImageView mNglContent; private NineGridImageViewAdapter<String> mAdapter = new NineGridImageViewAdapter<String>() { @Override protected void onDisplayImage(Context context, ImageView imageView, String s) { Picasso.with(context).load(s).placeholder(R.drawable.ic_ab_app).into(imageView); } @Override protected ImageView generateImageView(Context context) { return super.generateImageView(context); } @Override protected void onItemImageClick(Context context, int position, List<String> list) { try { Intent intent = new Intent(context, FullPhoto.class); intent.putStringArrayListExtra(Constants.BUNDLE_BITMAP, (ArrayList<String>)list); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(intent); }catch (Exception e){} } }; public PostViewHolder(View itemView) { super(itemView); cv = (CardView) itemView.findViewById(R.id.card_view_wall); news_name = (TextView) itemView.findViewById(R.id.news_name); textDatePost = (TextView) itemView.findViewById(R.id.textDatePost); textPost = (TextView) itemView.findViewById(R.id.textPost); textlikePost = (TextView) itemView.findViewById(R.id.tv_likes_count); textrepostPost = (TextView) itemView.findViewById(R.id.tv_reposts_count); like = (ImageView) itemView.findViewById(R.id.iv_like); repost = (ImageView) itemView.findViewById(R.id.iv_repost); mNglContent = (NineGridImageView) itemView.findViewById(R.id.ngl_images); mNglContent.setAdapter(mAdapter); } }

I accept this:

 if (getIntent().getExtras() != null) { ar1 = getIntent().getExtras().getStringArrayList(Constants.BUNDLE_BITMAP); }

An error occurs:

 java.lang.ClassCastException: java.util.AbstractList$SubAbstractListRandomAccess cannot be cast to java.util.ArrayList at calculation.material.oma.sviter.by.PostAdapter$PostViewHolder$1$override.onItemImageClick(PostAdapter.java:112) at calculation.material.oma.sviter.by.PostAdapter$PostViewHolder$1$override.access$dispatch(PostAdapter.java) at calculation.material.oma.sviter.by.PostAdapter$PostViewHolder$1.onItemImageClick(PostAdapter.java:0) at com.jaeger.ninegridimageview.NineGridImageView$1.onClick(NineGridImageView.java:167) at android.view.View.performClick(View.java:5204) at android.view.View$PerformClick.run(View.java:21153) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
  • one
    that's it, what is the log? What kind of error is displayed in the log? Where is her glass race? - Vladyslav Matviienko
  • one
    this happens precisely because an error occurs that you ignore. }catch (Exception e){} , which translates into Russian, as если возникает ошибка типа Exception, сделать {}(ничего) - Vladyslav Matviienko
  • one
    write e.printStackTrace (); - Vladyslav Matviienko
  • one
    not true. This is impossible. Show where you wrote. - Vladyslav Matviienko
  • one
    Or simpler - remove the try ... catch altogether, then your application will fail with an error - Vladyslav Matviienko

1 answer 1

 java.lang.ClassCastException: java.util.AbstractList$SubAbstractListRandomAccess cannot be cast to java.util.ArrayList

Means that you are trying in this line:

 intent.putStringArrayListExtra(Constants.BUNDLE_BITMAP, (ArrayList<String>)list);

Your list result in an ArrayList , which it is not.

It’s as if you have some kind of animal that you are trying to use as a cow, but in reality it’s not a cow at all, but a turtle. Therefore, an error occurs trying to use one class as another.

To correct the error, you can create an ArrayList based on your list :

 intent.putStringArrayListExtra(Constants.BUNDLE_BITMAP, new ArrayList(list));