android : EndlessRecyclerOnScrollListener가 루프를 발생시킵니다.

Question

다음 코드를 사용하여 무한 스크롤을 구현합니다. 하지만 문제는 onScroll() 메서드가 계속 호출을 계속 수행하고 데이터로드가 무한 루프에 빠지기 때문입니다. 나는 무엇을 여기에서 놓치고 있냐?

public abstract class EndlessRecyclerOnScrollListener extends RecyclerView.OnScrollListener { 

    public int previousTotal = 0; // The total number of items in the dataSet after the last load 
    public boolean loading = true; // True if we are still waiting for the last set of data to load. 
    public int visibleThreshold = 0; // The minimum amount of items to have below your current scroll position before loading more. 
    int firstVisibleItem, visibleItemCount, totalItemCount; 
    public int current_page = 1; 
    private LinearLayoutManager mLinearLayoutManager; 


    public EndlessRecyclerOnScrollListener(LinearLayoutManager 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(); 

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

      current_page++; 
      onLoadMore(current_page); 
      loading = true; 
     } 
    } 
    public abstract void onLoadMore(int current_page); 

    @Override 
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) { 
     super.onScrollStateChanged(recyclerView, newState); 
    } 
} 

내 활동

는 :

endlessRecyclerOnScrollListener = new EndlessRecyclerOnScrollListener(mLayoutManager) { 
      @Override 
      public void onLoadMore(int current_page) { 
        loadData() 

      } 
     }; 
     mRecyclerView.addOnScrollListener(endlessRecyclerOnScrollListener); 

Answer 1

이 내가 무한 스크롤을했고, 나를 위해 완벽하게 작동하는 방법이다. 감사합니다 ...

private boolean loading = true; 
int pastVisiblesItems, visibleItemCount, totalItemCount; 
LinearLayoutManager mLayoutManager; 


mLayoutManager = new LinearLayoutManager(this); 
mRecyclerView.setLayoutManager(mLayoutManager); 
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() 
{ 
    @Override 
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) 
    { 
     if(dy > 0) //check for scroll down 
     { 
      visibleItemCount = mLayoutManager.getChildCount(); 
      totalItemCount = mLayoutManager.getItemCount(); 
      pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition(); 

      if (loading) 
      { 
       if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) 
       { 
        loading = false; 
        Log.v("...", "We reach Last Item!"); 

        // fetch new data here or whatever you want. 
        DoPagination(); 

       } 
      } 
     } 
    } 
});