你好朋友，我是android的新手，我想在我的应用程序中集成无尽的recycleview，所以下面是我的代码
public class ActivityProdcutListWithMulipleView extends AppCompatActivity {
RecyclerView mRecyclerView;
Toolbar mToolbar;
PostParseGet mPostParseGet;
AllMethods mAllMethods;
GetProductListing mGetProductListing;
RecyclerView.LayoutManager mLayoutManager;
ProgressDialog mProgressDialog;
int page = 1;
int total=0;
int totalFeature=0;
int totalbanner=0;
ProductAdapter mProductAdapter;
ImageView mImageViewBack;
ArrayList<GetProductListing.ListingBlock> mListingBlocks;
ArrayList<GetProductListing.ListingBlock> mListingBlocksFeature;
ArrayList<GetProductListing.ListingBlock> mListingBlocksBanner;
ArrayList<OrderItemDemo> mOrderItemDemos = new ArrayList<OrderItemDemo>();
GridLayoutManager mLayoutManagerGrid;
DifferentRowAdapter adapter;
private Handler handler;
ArrayList<GetProductListing.ListingBlock> adapterData;
public static Activity mActivity;
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_product_list);
mListingBlocks = new ArrayList<>();
mActivity = this;
mListingBlocksFeature = new ArrayList<>();
mListingBlocksBanner = new ArrayList<>();
mRecyclerView = (RecyclerView) findViewById(R.id.recycle);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
mImageViewBack = (ImageView) mToolbar.findViewById(R.id.imgBack);
WebAPIApplication.mArrayListingAllProductBlocks.clear();
mPostParseGet = new PostParseGet(ActivityProdcutListWithMulipleView.this);
mAllMethods = new AllMethods(ActivityProdcutListWithMulipleView.this);
mGetProductListing = new GetProductListing();
mLayoutManagerGrid = new GridLayoutManager(ActivityProdcutListWithMulipleView.this, 2);
mLayoutManager = new LinearLayoutManager(ActivityProdcutListWithMulipleView.this);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(mLayoutManagerGrid);
handler = new Handler();
adapterData = new ArrayList<>();
mRecyclerView.addOnScrollListener(new EndlessRecyclerGridOnScrollListener(mLayoutManagerGrid) {
@Override
public void onLoadMore(int current_page) {
if (WebAPIApplication.mArrayListingAllProductBlocks.size() < total) {
page++;
new getProductData(false).execute();
}
}
});
adapter = new DifferentRowAdapter(mOrderItemDemos);
mRecyclerView.setAdapter(adapter);
mLayoutManagerGrid.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
return adapter.getItemViewType(position) == OrderItemDemo.BANNER_TYPE ? 2 : 1;
}
});
if (mAllMethods.check_Internet() == true) {
new getProductData(true).execute();
} else {
mAllMethods.ShowDialog(ActivityProdcutListWithMulipleView.this, "", getString(R.string.net_not_available), "OK");
}
mImageViewBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
}
public static class DifferentRowAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private int visibleThreshold = 5;
private int lastVisibleItem, totalItemCount;
private boolean loading;
boolean isLoading = false, isMoreDataAvailable = true;
private List<OrderItemDemo> mList;
OnLoadMoreListener loadMoreListener;
public DifferentRowAdapter(List<OrderItemDemo> list) {
this.mList = list;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view;
switch (viewType) {
case OrderItemDemo.NORMAL_TYPE:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_list_file, parent, false);
return new ProductListRow(view);
case OrderItemDemo.FEATURE_TYPE:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_list_feature_file, parent, false);
return new ProductListRow(view);
case OrderItemDemo.BANNER_TYPE:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_list_file, parent, false);
return new ProductListRow(view);
}
return null;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if(position>=getItemCount()-1 && isMoreDataAvailable && !isLoading && loadMoreListener!=null){
isLoading = true;
loadMoreListener.onLoadMore();
}
final OrderItemDemo object = mList.get(position);
if (object != null) {
switch (object.getmType()) {
case OrderItemDemo.NORMAL_TYPE:
((ProductListRow) holder).name.setText(object.getId()+" "+ object.getTitle());
((ProductListRow) holder).price.setText(object.getType());
Picasso.with(mActivity)
.load(object.getImage())
.into(((ProductListRow) holder).mImageViewProduct);
((ProductListRow) holder).mImageViewBanner.setVisibility(View.GONE);
((ProductListRow) holder).mRelativeLayout.setVisibility(View.VISIBLE);
break;
case OrderItemDemo.FEATURE_TYPE:
((ProductListRow) holder).name.setText(object.getId()+" "+object.getTitle());
((ProductListRow) holder).price.setText(object.getType());
((ProductListRow) holder).mImageViewBanner.setVisibility(View.GONE);
((ProductListRow) holder).mRelativeLayout.setVisibility(View.VISIBLE);
Picasso.with(mActivity)
.load(object.getImage())
.into(((ProductListRow) holder).mImageViewProduct);
break;
case OrderItemDemo.BANNER_TYPE:
((ProductListRow) holder).price.setText(object.getType());
((ProductListRow) holder).mImageViewBanner.setVisibility(View.VISIBLE);
((ProductListRow) holder).mRelativeLayout.setVisibility(View.GONE);
break;
}
}
}
public void setMoreDataAvailable(boolean moreDataAvailable) {
isMoreDataAvailable = moreDataAvailable;
}
public void notifyDataChanged(){
notifyDataSetChanged();
isLoading = false;
}
interface OnLoadMoreListener{
void onLoadMore();
}
public void setLoadMoreListener(OnLoadMoreListener loadMoreListener) {
this.loadMoreListener = loadMoreListener;
}
@Override
public int getItemCount() {
if (mList == null)
return 0;
return mList.size();
}
@Override
public int getItemViewType(int position) {
if (mList != null) {
OrderItemDemo object = mList.get(position);
if (object != null) {
return object.getmType();
}
}
return 0;
}
}
public abstract class EndlessRecyclerGridOnScrollListener extends
RecyclerView.OnScrollListener {
public String TAG = EndlessRecyclerOnScrollListener.class
.getSimpleName();
private int previousTotal = 0;
private boolean loading = true;
private int visibleThreshold = 5;
int firstVisibleItem, visibleItemCount, totalItemCount;
private int current_page = 1;
private LinearLayoutManager mLinearLayoutManager;
public EndlessRecyclerGridOnScrollListener(
GridLayoutManager linearLayoutManager) {
this.mLinearLayoutManager = linearLayoutManager;
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
visibleItemCount = recyclerView.getChildCount();
totalItemCount = mLinearLayoutManager.getItemCount();
firstVisibleItem = mLinearLayoutManager.findFirstVisibleItemPosition();
visibleThreshold = total;
if (loading) {
if (totalItemCount > previousTotal) {
loading = false;
previousTotal = totalItemCount;
}
}
if (!loading
&& (totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold)) {
// End has been reached
// Do something
current_page++;
onLoadMore(current_page);
loading = true;
}
}
public abstract void onLoadMore(int current_page);
}
public class getProductData extends AsyncTask<Void, Void, Void> {
boolean showLoading;
public getProductData(boolean showLoading) {
this.showLoading = showLoading;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
if (showLoading == true) {
mProgressDialog = ProgressDialog.show(ActivityProdcutListWithMulipleView.this, "", "Loading..");
}
}
@Override
protected Void doInBackground(Void... voids) {
mGetProductListing = (GetProductListing) mPostParseGet.getTopSearchData(mGetProductListing, page);
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
if (showLoading == true) {
if (mProgressDialog != null) {
mProgressDialog.dismiss();
}
}
if (mGetProductListing != null) {
try {
total = Integer.parseInt(mGetProductListing.getListing().getTotal());
if (mGetProductListing.getListing().getData().size() > 0) {
mListingBlocks = getProductBlock();
Log.e("FeatureSize",String.valueOf(mListingBlocksFeature.size()));
Log.e("BannerSize",String.valueOf(mListingBlocksBanner.size()));
for (int i = 0; i < WebAPIApplication.mArrayListingAllProductBlocks.size(); i++) {
if (WebAPIApplication.mArrayListingAllProductBlocks.get(i).getType().equalsIgnoreCase("product")) {
mOrderItemDemos.add(new OrderItemDemo(WebAPIApplication.mArrayListingAllProductBlocks.get(i).getId(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getTitle(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getType(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getMedium_image(), OrderItemDemo.NORMAL_TYPE));
} else if (WebAPIApplication.mArrayListingAllProductBlocks.get(i).getType().equalsIgnoreCase("featured")) {
mOrderItemDemos.add(new OrderItemDemo(WebAPIApplication.mArrayListingAllProductBlocks.get(i).getId(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getTitle(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getType(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getMedium_image(), OrderItemDemo.FEATURE_TYPE));
} else {
mOrderItemDemos.add(new OrderItemDemo(WebAPIApplication.mArrayListingAllProductBlocks.get(i).getId(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getTitle(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getType(), WebAPIApplication.mArrayListingAllProductBlocks.get(i).getMedium_image(), OrderItemDemo.BANNER_TYPE));
}
}
adapter = new DifferentRowAdapter(mOrderItemDemos);
mRecyclerView.setAdapter(adapter);
}
}catch (Exception e)
{
e.printStackTrace();
}
}
}
}
/*Get Product data */
public ArrayList<GetProductListing.ListingBlock> getProductBlock() {
ArrayList<GetProductListing.ListingBlock> mArrayListParserLog = new ArrayList<GetProductListing.ListingBlock>();
for (int i = 0; i < mGetProductListing.getListing().getData().size(); i++) {
GetProductListing.ListingBlock mParserLog = new GetProductListing.ListingBlock();
mParserLog.setId(mGetProductListing.getListing().getData().get(i).getId());
mParserLog.setType(mGetProductListing.getListing().getData().get(i).getType());
mParserLog.setTitle(mGetProductListing.getListing().getData().get(i).getTitle());
mParserLog.setDiscountSale(mGetProductListing.getListing().getData().get(i).getDiscountSale());
mParserLog.setDiscountSelling(mGetProductListing.getListing().getData().get(i).getDiscountSelling());
mParserLog.setPrice(mGetProductListing.getListing().getData().get(i).getPrice());
mParserLog.setAupc(mGetProductListing.getListing().getData().get(i).getAupc());
mParserLog.setSale_end(mGetProductListing.getListing().getData().get(i).getSale_end());
mParserLog.setSale_start(mGetProductListing.getListing().getData().get(i).getSale_start());
mParserLog.setSelling_price(mGetProductListing.getListing().getData().get(i).getSelling_price());
mParserLog.setProduct_rating(mGetProductListing.getListing().getData().get(i).getProduct_rating());
mParserLog.setSlug(mGetProductListing.getListing().getData().get(i).getSlug());
mParserLog.setSold_out(mGetProductListing.getListing().getData().get(i).getSold_out());
mParserLog.setImage(mGetProductListing.getListing().getData().get(i).getImage());
mParserLog.setSku_id(mGetProductListing.getListing().getData().get(i).getSku_id());
mParserLog.setMedium_image(mGetProductListing.getListing().getData().get(i).getMedium_image());
mArrayListParserLog.add(mParserLog);
WebAPIApplication.mArrayListingAllProductBlocks.add(mParserLog);
}
return mArrayListParserLog;
}
}
当我在上面调用上面的代码并调用分页时，每当有任何想法如何解决时，它会集中在顶部？你的所有建议都很明显
答案 0 :(得分：0)
adapter = new DifferentRowAdapter(mOrderItemDemos);
mRecyclerView.setAdapter(adapter);
不要创建新的适配器。更改适配器，以便它可以处理添加到它的新项目，然后在其上调用notifyDataSetChanged。通过设置新适配器，回收器视图将失去其位置并从顶部开始。