RecyclerView carga más con el error ProgressBar
Estoy tratando de crearRecyclerview
onLoadMore conProgressBar
en el fondo. He intentadoesta solución, pero método onLoadMore en miActivity
nunca se llama. Por favor, ayúdame.
Aquí está miAdapter
:
public class NewsAdapterTest extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<NewsDataModel> dataSet;
private Context context;
private final int VIEW_ITEM = 1;
private final int VIEW_PROG = 0;
// The minimum amount of items to have below your current scroll position before loading more.
private int visibleThreshold = 2;
private int lastVisibleItem, totalItemCount;
private boolean loading;
private OnLoadMoreListener onLoadMoreListener;
public NewsAdapterTest(ArrayList<NewsDataModel> data, Context context, RecyclerView recyclerView) {
this.dataSet = data;
this.context = context;
if (recyclerView.getLayoutManager() instanceof LinearLayoutManager) {
final LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
totalItemCount = linearLayoutManager.getItemCount();
lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
if (!loading && totalItemCount <= (lastVisibleItem + visibleThreshold)) {
// End has been reached
// Do something
Log.i("newsAdaptertest", "onScrolled: End reached");
if (onLoadMoreListener != null) {
onLoadMoreListener.onLoadMore();
}
loading = true;
}
}
});
}
}
public class MyViewHolder extends RecyclerView.ViewHolder {
ExpandableTextView postMessage;
TextView postTitle;
TextView postSubTitle;
ImageView authorImage;
public MyViewHolder(View itemView) {
super(itemView);
this.authorImage = (ImageView) itemView.findViewById(R.id.header_image);
this.postTitle = (TextView) itemView.findViewById(R.id.header_title);
this.postSubTitle = (TextView) itemView.findViewById(R.id.header_subtitle);
this.postMessage = (ExpandableTextView) itemView.findViewById(R.id.post_text_expand);
}
}
@Override
public int getItemCount() {
return dataSet.size();
}
@Override
public int getItemViewType(int position) {
return dataSet.get(position) != null ? VIEW_ITEM : VIEW_PROG;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
RecyclerView.ViewHolder vh;
if (viewType == VIEW_ITEM) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycler_news, parent, false);
vh = new MyViewHolder(v);
} else {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycler_progress, parent, false);
vh = new ProgressViewHolder(v);
}
return vh;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int listPosition) {
if (holder instanceof MyViewHolder) {
Binding Views...
} else {
((ProgressViewHolder) holder).progressBar.setIndeterminate(true);
}
}
public void setLoaded() {
loading = false;
}
public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) {
this.onLoadMoreListener = onLoadMoreListener;
}
public interface OnLoadMoreListener {
void onLoadMore();
}
public static class ProgressViewHolder extends RecyclerView.ViewHolder {
public ProgressBar progressBar;
public ProgressViewHolder(View v) {
super(v);
progressBar = (ProgressBar) v.findViewById(R.id.progressBar);
}
}
}
Y mi actividad:
private static NewsAdapterTest adapter;
private LinearLayoutManager layoutManager;
private static RecyclerView recyclerView;
private ArrayList<NewsDataModel> data = new ArrayList<NewsDataModel>();
recyclerView = (RecyclerView) findViewById(R.id.recyclerview_news);
layoutManager = new LinearLayoutManager(this);
adapter = new NewsAdapterTest(data, NewsActivity.this, recyclerView);
recyclerView.setHasFixedSize(false);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
adapter.setOnLoadMoreListener(new NewsAdapterTest.OnLoadMoreListener() {
@Override
public void onLoadMore() {
Log.i(TAG, "onLoadMore called");
//add progress item
data.add(null);
adapter.notifyItemInserted(data.size() - 1);
Log.i(TAG, "Loading new data... (" + Integer.toString(loadNumber) + ") posts");
loadPosts(startLoadPosition, loadNumber);
startLoadPosition += loadNumber;
//remove progress item
data.remove(data.size() - 1);
adapter.notifyItemRemoved(data.size());
//add items one by one
adapter.setLoaded();
//or you can add all at once but do not forget to call mAdapter.notifyDataSetChanged();
}
});