在recyclerview中从json中采集图片。到了最后,如何加载下一页?我只是在学习使用retrofit2,rxjava2。请大家不要严格评判,提出我做错的地方。我把监听器挂在适配器内部的onBind中。
@Override public void onBindViewHolder(@NonNull ImageViewHolder holder, final int position) {
Hit hit = hits.get(position);
Picasso.get().load(hit.getLargeImageURL())
.into(holder.imageViewPreview);
if (loadMoreListener != null && !isLoading && !noMore && position == getItemCount() - 1) {
isLoading = true;
loadMoreListener.loadMore();
}
我试图通过向参数传递下一个页面的编号来实现加载下一个页面的激活。
adapter.setLoadMoreListener(new ImageAdapter.LoadMoreListener() {
@Override
public void loadMore() {
Toast.makeText(MainActivity.this, "Конец", Toast.LENGTH_SHORT).show();
page++;
viewModel.loadImages(searchQuery, page);
adapter.endLoading();
adapter.setNoMore(true);
adapter.notifyDataSetChanged();
}
});
当RecyclerView正在计算布局或滚动时,不能调用这个方法 androidx.recyclerview.widget.RecyclerView
LoadImages () 方法代码。
public void loadImages(String query, int page){
NetworkService networkService = NetworkService.getInstance();
compositeDisposable = new CompositeDisposable();
Disposable disposable = networkService.getJSONApi()
.getResponse(query, page)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Consumer<Response>() {
@Override
public void accept(Response response) throws Exception {
deleteHits();
insertHits(response.getHits());
}
}, new Consumer<Throwable>() {
@Override
public void accept(Throwable throwable) throws Exception {
Toast.makeText(getApplication(), throwable.getMessage(), Toast.LENGTH_SHORT).show();
}
});
compositeDisposable.add(disposable);
}
尝试用下面的代码通知适配器。
recyclerview.post(new Runnable() {
@Override
public void run() {
myadapter.notifyDataSetChanged();
}
});
也可以检查: https:/www.journaldev.com24041android-recyclerview-load-more-endless-scrolling