より多くのrecyclerviewをsuperslimライブラリでロードする

Question

私はloadmoreでSuperslim Libraryを使用していますが、エラーが発生します。さらに負荷のためにEndlessRecyclerOnScrollListenerクラスを1つ作成しますが、それは動作しません。

私はこれを以下の方法で呼び出しています。

mViews.mRecyclerView.addOnScrollListener(new EndlessRecyclerOnScrollListener(new LayoutManager(getActivity())) { 
      @Override 
      public void onLoadMore(int current_page) { 
       if (skipItem == 0) 
        skipItem = 1 * current_page; 
       else 
        skipItem = skipItem * current_page; 

       new ServiceSync().execute("26", String.valueOf(skipItem)); 
      } 
     }); 


public abstract class EndlessRecyclerOnScrollListener extends RecyclerView.OnScrollListener { 
     private int previousTotal = 0; // The total number of items in the dataset after the last load 
     private boolean loading = true; // True if we are still waiting for the last set of data to load. 
     private int visibleThreshold = 4; // The minimum amount of items to have below your current scroll position before loading more. 
     int firstVisibleItem, visibleItemCount, totalItemCount; 

     private int current_page = 1; 

     private LayoutManager mlayoutManager; 

     public EndlessRecyclerOnScrollListener(LayoutManager linearLayoutManager) { 
      this.mlayoutManager =(LayoutManager) linearLayoutManager; 
     } 

     @Override 
     public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 
      super.onScrolled(recyclerView, dx, dy); 

      visibleItemCount = recyclerView.getChildCount(); 
      totalItemCount = mlayoutManager.getItemCount(); 
      firstVisibleItem = mlayoutManager.findFirstVisibleItemPosition(); 

      if (loading) { 
       if (totalItemCount > previousTotal) { 
        loading = false; 
        previousTotal = totalItemCount; 
       } 
      } 
      if (!loading && (totalItemCount - visibleItemCount) 
        <= (firstVisibleItem + visibleThreshold)) { 
       // End has been reached 
       // Do something here 
       current_page++; 
       loading = true; 
      } 
     } 

     public abstract void onLoadMore(int current_page); 
    } 

エラーログ：

java.lang.NullPointerException at com.tonicartos.superslim.SectionData.<init>(SectionData.java:36) 
at com.tonicartos.superslim.LayoutManager.findFirstVisibleItem(LayoutManager.java:156) 
at com.tonicartos.superslim.LayoutManager.findFirstVisibleItemPosition(LayoutManager.java:187) 
at fourever.textile.notificationadapter.notifications$EndlessRecyclerOnScrollListener.onScrolled(notifications.java:235) 
at android.support.v7.widget.RecyclerView.dispatchOnScrolled(RecyclerView.java:3704) 
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2947) 

Answer 1

これは私のEndlessRecyclerOnScrollListenerで、正常に動作します：

@Override 
public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 
    super.onScrolled(recyclerView, dx, dy); 

    if(mLinearLayoutManager == null) return; 

    int visibleItemCount = recyclerView.getChildCount(); 
    int totalItemCount = mLinearLayoutManager.getItemCount(); 
    int firstVisibleItem = mLinearLayoutManager.findFirstVisibleItemPosition(); 

    if (loading) { 
     if (totalItemCount > previousTotal) { 
      loading = false; 
      previousTotal = totalItemCount; 
     } 
    } 
    if (!loading && (totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold)) { 
     // End has been reached 

     // Do something 
     currentPage++; 

     onLoadMore(currentPage); 

     loading = true; 
    } 

    if (mLinearLayoutManager.findLastVisibleItemPosition() == totalItemCount - 1) { 
     onEnd(totalItemCount); 
    } 

} 

Answer 2

これは

LoadMoreRecyclerView

LoadMoreRecyclerViewライブラリです