java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 6(offset:6).state

最新推荐文章于 2022-04-09 09:41:26 发布

原创最新推荐文章于 2022-04-09 09:41:26 发布 · 2.5k 阅读

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#RecyclerView异常处理

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本文介绍如何在使用RecyclerView并结合上拉加载和下拉刷新功能时，避免出现IndexOutOfBoundsException异常。通过控制上拉加载与下拉刷新的执行时机，确保两者不会同时触发，有效防止异常的发生。

如果你在界面中使用了RecyclerView，并且添加了上拉加载和下拉刷新的功能的话，一定对这个异常不会陌生。因为这个异常就时常发生在刷新清除数据的时候，刚好上拉加载的也调用了notifyDataSetChange();

然后就会跑出如下异常:

java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 6(offset:6).state:9
	at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java)
	at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java)
	at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java)
	at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java)
	at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java)
	at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java)
	at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java)
	at android.support.v7.widget.RecyclerView.scrollByInternal(RecyclerView.java)
	at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java)
	at android.view.View.dispatchTouchEvent(View.java:7706)

所以，要怎么避免这个bug呢？这就需要把上拉加载和下拉刷新区分开来，让着两个不再同一时间发生。但是我们没有办法去阻止用户去做这样的操作，所以只能在代码上下功夫。我们举个例子

public class FragmentKaifuTodayAndTomorrow extends BaseFragment implements OnRefreshListener, ItemKaiFuKaiCeFragmentLayout.OnClickRemindListener, UserManager.IOnLogin, UserManager.IOnLoginOut {
    
    private SwipeRefreshLayout mSwipeRefreshLayout;
    private RecyclerView mRecyclerView;
    private AdapterKaiFuKaiCeTodayAndTomorrow mAdapter;
    private LinearLayoutManager mLinearLayoutManager;
    private ArrayList<KaiFuKaiCeBean> mDatas = new ArrayList<KaiFuKaiCeBean>();

    private ProtocolHomeKaiFuKaiCe mProtocolHomeKaiFuKaiCe;//获取数据
    
    private FootView mFootView;

    private boolean mIsLoadingMore;//是否在加载更多数据

  
    //下拉加载更多数据时候的网络请求
    private void getMoreData() {
        mIsLoadingMore = true;//开始请求的时候就置true标志正在加载
        mProtocolHomeKaiFuKaiCe = new ProtocolHomeKaiFuKaiCe(getActivity(), mDatas.size(), Constants.SIZE, mType, new ProtocolBase.IProtocolListener() {
            @Override
            public void onSuccess(Object resultData) {
                if (!getActivity().isFinishing()) {
                    mFootView.invisible();
                    int start = mDatas.size();
                    if (mProtocolHomeKaiFuKaiCe.mDatas.size() > 0) {
                        mDatas.addAll(mProtocolHomeKaiFuKaiCe.mDatas);
                        mAdapter.notifyItemRangeInserted(start, mProtocolHomeKaiFuKaiCe.mDatas.size());
                    } else {
                        mFootView.hide();
                        ToastUtils.showLongToast(getActivity(), "没有更多数据");
                    }
                    mProtocolHomeKaiFuKaiCe = null;
                   
                    mIsLoadingMore = false;//请求更多数据成功了，并且notifyItemRangeInserted之后就置false标识已

                                          //经添加完数据
                }
            }

            @Override
            public void onFailure(int state,boolean hasCache, String errMsg) {
                if (!getActivity().isFinishing()) {
                    ToastUtils.showLongToast(getActivity(), errMsg);
                    mIsLoadingMore = false;//请求数据失败了，也要更改加载标识
                }
            }
        });
        mProtocolHomeKaiFuKaiCe.postRequest();
    }

    @Override
    public void onRefresh() {
        if(mIsLoadingMore){//加载更多数据的时候不执行刷新数据请求
            mSwipeRefreshLayout.setRefreshing(false);
            return;
        }
        loadData(getContext());//刷新数据
    }



    @Override
    protected void initViews(View convertView) {
       
        mSwipeRefreshLayout = (SwipeRefreshLayout) convertView.findViewById(R.id.activity_kaifukaice_layout_refresh);
        mSwipeRefreshLayout.setColorSchemeResources(android.R.color.holo_green_light, android.R.color.holo_blue_bright, android.R.color.holo_orange_light, android.R.color.holo_red_light);
        mRecyclerView = (RecyclerView) convertView.findViewById(R.id.activity_kaifukaice_layout_recyclerview);

        mLinearLayoutManager = new LinearLayoutManager(getContext());
        mRecyclerView.setLayoutManager(mLinearLayoutManager);
        mFootView = new FootView(getContext(), mRecyclerView);
        mAdapter = new AdapterKaiFuKaiCeTodayAndTomorrow(getContext(), mDatas,mType);

        mAdapter.setFooterView(mFootView.getView());
        mRecyclerView.setAdapter(mAdapter);
        mSwipeRefreshLayout.setOnRefreshListener(this);

        mAdapter.setOnClickRemindListener(this);
        mRecyclerView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                return null != mSwipeRefreshLayout && mSwipeRefreshLayout.isRefreshing();//刷新的时候不加载更多数据,刷新的时候控制列表不可滑动
            }
        });
       
    }

}

这样就实现了对上拉加载滚动和下拉刷新数据请求的控制，使他们不会在同一时间发生，从而避免的异常。