java.lang.ClassCastException:无法将适配器转换为android.widget.ListView.removeFooterView上的android.widget.HeaderServiceWListAdapter

我正在使用fragment's显示Facebook页面的帖子和事件。用于显示“帖子”。我正在使用FeedFragment，我正在应用LoadMore来获取下一个Facebook页面的帖子，所以在ListView上我添加了footerView来显示LoadMore

应用程序在版本4.4.4或更高版本bt上运行良好，因为我正在使用版本4.2.2进行测试，所以它会在下面的4.4.4中崩溃

这是我的课程

这是logcat：我在遵循顺序

添加页脚视图。 设置适配器 删除页脚视图

09-01 23:12:35.962 15538-15538/com.sample.example E/AndroidRuntime﹕ 致命异常：主 java.lang.ClassCastException:com.efi志愿者.android.adapter.FeedAdapter无法强制转换为android.widget.HeaderServiceWListAdapter 在android.widget.ListView.removeFooterViewListView.java:396 在com.efiVolunt.android.fragments.FeedsFragment.parseResponseFeedsFragment.java:283 在com.efior.android.fragments.FeedsFragment.access$500FeedsFragment.java:44 在com.efiVolunt.android.fragments.FeedsFragment$4.onCompletedFeedsFragment.java:173 在com.facebook.GraphRequest$5.runGraphRequest.java:1243 位于android.os.Handler.handleCallbackHandler.java:725 位于android.os.Handler.dispatchMessageHandler.java:92 在android.os.Looper.Looper.java:176 在android.app.ActivityThread.mainActivityThread.java:5317 在java.lang.reflect.Method.invokenactive方法中 位于java.lang.reflect.Method.invokeMethod.java:511 在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.runZygoteInit.java:1102此处输入代码 位于com.android.internal.os.ZygoteInit.mainZygoteInit.java:869 在dalvik.system.NativeStart.mainNative方法

我提供了解决方案，我使用的顺序如下：-

添加页脚 进行API调用，并在得到响应后将其设置为适配器。 当列表为空时删除标题。 现在它在S2V-4.2.2上工作

---

在kitkat.v4.4.4之后的版本中，此序列限制已放宽。

我在此日志中未发现任何错误。这是nullPointerException..不，抱歉，我尝试过，但没有找到解决方案…感谢您的帮助rj

public class FeedsFragment extends Fragment implements View.OnClickListener{
    public static final String ARG_INITIAL_POSITION = "ARG_INITIAL_POSITION";
    AccessToken accessToken;
    @InjectView(R.id.observable_list)
    ObservableListView listView;

    @InjectView(R.id.swipeRefreshLayoutFeeds)
    SwipeRefreshLayout swipeRefreshed;
    @InjectView(R.id.loading_progress_bar)
    ProgressBar loadingProgressBar;
    public FeedAdapter feedAdapter;
    String feedResponseStr;
    View footerView;
    String urlFeeds;
    private static final String FEED_PARAMETERS = "description,message,source,from,attachments{subattachments,media},created_time,type,id,link";
    private ArrayList<Datamodel> dataModels = new ArrayList<>();
    private boolean isLoading, isFirstTime = true;
    private int lastResponseItemCount;
    //parser
    FeedsParserEntity feedsParserEntity;
    String jsonNext = null;
    String facebookPageLimit = "0";
    String limit="25",until,pagingToken;
    int fbPageLimit;
    boolean nextPageFirsttime = false;

    @Override
    public View onCreateView(final LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        final View rootView = inflater.inflate(R.layout.fragment_posts_event, container, false);
        Activity parentActivity = getActivity();
        accessToken = AccessToken.getCurrentAccessToken();
        ButterKnife.inject(this, rootView);

        if (NetworkUtility.isNetworkAvailable(parentActivity)){
            Timber.e("Network is available");
        }else {
            Timber.e("Network not available");
        }
       footerView = inflater.inflate(R.layout.auto_load_more_footer, null, false);
       listView.addHeaderView(inflater.inflate(R.layout.padding, listView, false));

       // listView.addHeaderView(listView,inflater.inflate(R.layout.padding,null),false);

       // setDummyDataWithHeader(listView, inflater.inflate(R.layout.padding, listView, false));


       getFeeds();



        /*
        * Toolbar hide and show on Scrolling activity
        * **/
        if (parentActivity instanceof ObservableScrollViewCallbacks) {
            Bundle args = getArguments();
            if (args != null && args.containsKey(ARG_INITIAL_POSITION)) {
                final int initialPosition = args.getInt(ARG_INITIAL_POSITION, 1);
                ScrollUtils.addOnGlobalLayoutListener(listView, new Runnable() {
                    @Override
                    public void run() {

                        listView.setSelection(initialPosition);
                    }
                });
            }
            listView.setTouchInterceptionViewGroup((ViewGroup) parentActivity.findViewById(R.id.root));
            listView.setScrollViewCallbacks((ObservableScrollViewCallbacks) parentActivity);
        }
        listView.setOnScrollListener(new AbsListView.OnScrollListener() {
            int currentScrollState;

            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
                //Timber.e("currentScrollState::" + currentScrollState);
                currentScrollState = SCROLL_STATE_IDLE;
            }

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
                int loadMore = firstVisibleItem + visibleItemCount;
                if (!isLoading) {
                    if (loadMore == totalItemCount && totalItemCount != 0) {
                        if (!isFirstTime && (lastResponseItemCount % fbPageLimit == 0)) {
                           listView.addFooterView(footerView);
                            getFeeds();
                            isLoading = true;
                        }
                    } else {
                        if (listView != null) {
                           listView.removeFooterView(footerView);
                        }
                    }
                } else if (currentScrollState == SCROLL_STATE_IDLE && (totalItemCount - visibleItemCount) <= firstVisibleItem) {
                    Timber.i("No data  found here to load...");
                }
            }
        });


        swipeRefreshed.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                swipeRefreshed.setRefreshing(true);
                isFirstTime = true;
                getFeeds();
            }
        });

        return rootView;
    }

    private void getFeeds() {
        Bundle feedResponse;
        GraphRequest request = new GraphRequest(accessToken,
                "/" + Constant.FACEBOOK_PAGEID + "/feed",
                null,
                HttpMethod.GET,
                new GraphRequest.Callback() {
                    @Override
                    public void onCompleted(GraphResponse graphResponse) {
                        isLoading = false;
                        feedResponseStr = graphResponse.getRawResponse();
                        //Timber.e("feedResponseStr::"+feedResponseStr);
                        if (feedResponseStr != null) {
                            getNextPage(feedResponseStr);
                            parseResponse(feedResponseStr);
                        }

                    }
                });
            if (isFirstTime) {
                isLoading = true;
                feedResponse = new Bundle();
                feedResponse.putString("fields", FEED_PARAMETERS);

                if (nextPageFirsttime){
                    feedResponse.putString("limit",limit);
                    feedResponse.putString("_paging_token",pagingToken);
                    feedResponse.putString("until", until);
                }

            } else {
                feedResponse = new Bundle();
                feedResponse.putString("limit",limit);
                feedResponse.putString("_paging_token",pagingToken);
                feedResponse.putString("until", until);
                feedResponse.putString(Constant.FIELDS, FEED_PARAMETERS);
            }
            request.setParameters(feedResponse);
            request.executeAsync();
    }

    private void getNextPage(String feedResponseStr) {

        JSONObject json = null;
        try {
            json = new JSONObject(feedResponseStr);
        } catch (JSONException e) {
            e.printStackTrace();
        }


        JSONObject json_LL = null;
        try {
            assert json != null;
            json_LL = json.getJSONObject("paging");
            jsonNext = json_LL.optString("next");
            if (jsonNext == null){
                return;
            }
            String tempNext = jsonNext;
            //newNextJson = tempNext.replace("https://graph.facebook.com/v2.3/","");
            String limitArray[] = tempNext.split("&");
            int limitposition = Arrays.asList(limitArray).indexOf("limit=25");

            String limitFirst[] = limitArray[limitposition].split("=");
            limit = limitFirst[1];
            facebookPageLimit = limit;
            try {
                fbPageLimit = Integer.parseInt(facebookPageLimit);
            }catch (NumberFormatException e){
                e.printStackTrace();
            }

            String untilFirst[] = limitArray[4].split("=");
            until = untilFirst[1];

            String pagingTokenFirst[] = limitArray[5].split("=");
            pagingToken = pagingTokenFirst[1];
        } catch (JSONException e) {
            e.printStackTrace();
        }

    }

    private void parseResponse(String feedResponseStr) {

        Gson gson = new Gson();
        feedsParserEntity = gson.fromJson(feedResponseStr,FeedsParserEntity.class);

        //if first call does not contain any post
        if (feedsParserEntity.getDatamodels(getActivity()).size()==0){
            if (isFirstTime){
                nextPageFirsttime = true;
                getFeeds();
            }
        }

        /**
         *if it is not first call but pageResponse limit is less than faceBook Bydefault limit
         */

        if (!isFirstTime && feedsParserEntity.getData().size() <= fbPageLimit - 1) {
                lastResponseItemCount = feedsParserEntity.getData().size();
                listView.removeFooterView(footerView);
                ArrayList<Datamodel> lastDataModel = new ArrayList<>();
                lastDataModel.addAll(feedsParserEntity.getDatamodels(getActivity()));
                dataModels.addAll(lastDataModel);

          //  ((feedAdapter)(HeaderViewListAdapter)listView.getAdapter()).getWrappedAdapter()).notifyDataSetChanged();
            feedAdapter.notifyDataSetChanged();
            return;
        }

        if (isFirstTime) {

            if (listView != null){
                dataModels.clear();
            }
            dataModels.addAll(feedsParserEntity.getDatamodels(getActivity()));
            setUpList();
            isFirstTime = false;
        }else {
            ArrayList<Datamodel> newDataModel = new ArrayList<>();
            newDataModel.addAll(feedsParserEntity.getDatamodels(getActivity()));
            if (!(nextPageFirsttime)){
                newDataModel.remove(0);
                //nextPageFirsttime = false;
            }
            // feedsParserEntity.getDatamodels().remove(0);
            dataModels.addAll(newDataModel);
            feedAdapter.notifyDataSetChanged();
            nextPageFirsttime = false;
        }
    }

    private void setUpList() {
        loadingProgressBar.setVisibility(View.GONE);
        listView.addFooterView(footerView);
        feedAdapter = new FeedAdapter(getActivity(),dataModels);
        listView.setAdapter(feedAdapter);
        if (listView != null){
            swipeRefreshed.setRefreshing(false);
        }
    }


    @Override
    public void onDestroyView() {
        super.onDestroyView();
        ButterKnife.reset(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case 1:
                Intent i = new Intent(Intent.ACTION_VIEW);
                i.setData(Uri.parse(urlFeeds));
                startActivity(i);
        }
    }

}//feedsfragment