更新 - 07/03/2018

Question

更新 - 07/03/2018

看起来问题可能是由于我对list的延迟加载造成的：在我的列表中，我可能有pictures, spinners, multispinners, ... 为了提高性能，我在background中加载了数据源或图片，因此我不必为此停止我的用户界面。

看起来如果我刷新数据源太快，而这些组件正在加载，则会导致错误。

仍在尝试，我会保持更新。

我的RecyclerView充满了适配器。执行某些操作后，我通过单击另一个列表项来更改数据源，并通知适配器，如下所示：

确保我也停止了滚动：（updateDataSource方法只刷新我的适配器中的ArrayList）

private void setupList() {
    //questi sono quelli che non hanno dipendenze.
    try {
        if (interventionActivityAdapter == null) {
            interventionActivityAdapter = new InterventionActivityAdapter(InterventoAttivitaFragment.this,
                    getActivity(),
                    new IReturnBoolToParent() {
                        public void onResult(boolean b) {
                            getActivity().getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE, WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
                            parseGetActivities();
                        }
                    },
                    myNonRealmActivitieAdapterPojos);
            mRecyclerView.setAdapter(interventionActivityAdapter);
            mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        } else {
            //listState = mRecyclerView.getLayoutManager().onSaveInstanceState();
            mRecyclerView.stopScroll();
            mRecyclerView.stopNestedScroll();
            interventionActivityAdapter.updateDataSource(myNonRealmActivitieAdapterPojos);
            interventionActivityAdapter.notifyDataSetChanged();
            getActivity().getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
            //mRecyclerView.getLayoutManager().onRestoreInstanceState(listState);
        }
    } catch (Exception ex) {
        ex.printStackTrace();
        Toast.makeText(getActivity(), "Errore durante l'analisi delle attività.", Toast.LENGTH_SHORT).show();
    }
    pbSyncState.setVisibility(View.GONE);
}

这是我的适配器

public class InterventionActivityAdapter extends RecyclerView.Adapter<InterventionActivityFieldViewHolder> {

    private Activity ctx;
    private Fragment f;
    private ArrayList<InterventionActivityFieldAdapterPojo> interventionActivityFieldAdapterPojos;
    private IReturnBoolToParent iReturnBoolToParent;

    public InterventionActivityAdapter(Fragment f,
                                       Activity ctx,
                                       IReturnBoolToParent iReturnBoolToParent,
                                       ArrayList<InterventionActivityFieldAdapterPojo> interventionActivityFieldAdapterPojos) {
        this.f = f;
        this.ctx = ctx;
        this.iReturnBoolToParent = iReturnBoolToParent;
        this.interventionActivityFieldAdapterPojos = interventionActivityFieldAdapterPojos;
    }

    public void updateDataSource(ArrayList<InterventionActivityFieldAdapterPojo> interventionActivityFieldAdapterPojos) {
        this.interventionActivityFieldAdapterPojos = interventionActivityFieldAdapterPojos;
    }

    @Override
    public int getItemViewType(int position) {
        if (interventionActivityFieldAdapterPojos.get(position).getType() == RuntimeHelper.ActivityChildType.PADRE) {
            return 1;
        } else {
            return 2;
        }
    }

    @Override
    public InterventionActivityFieldViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (ctx == null) {
            ctx = (Activity) parent.getContext();
        }
        View inflatedView = LayoutInflater.from(ctx)
                .inflate(viewType == 1 ? R.layout.item_interventionactivity : R.layout.item_interventionactivity_son, parent, false);
        return new InterventionActivityFieldViewHolder(inflatedView, f, ctx, false, iReturnBoolToParent);
    }

    @Override
    public void onBindViewHolder(InterventionActivityFieldViewHolder holder, int position) {
        InterventionActivityFieldAdapterPojo interventionActivityFieldAdapterPojo;
        interventionActivityFieldAdapterPojo = interventionActivityFieldAdapterPojos.get(position);
        holder.initInterventionActivityField(interventionActivityFieldAdapterPojo);
    }

    @Override
    public int getItemCount() {
        return interventionActivityFieldAdapterPojos != null ? interventionActivityFieldAdapterPojos.size() : 0;
    }
}

我使用自定义viewHolder，但它超过6万个字符，我无法在此处发布。

错误通过notifyDataSetChanged（）的调用到达。

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.netribe.business.gridwaywfm.netribe, PID: 25935
     java.lang.NullPointerException: Attempt to invoke interface method 'long android.widget.Adapter.getItemId(int)' on a null object reference
         at android.widget.AdapterView.fireOnSelected(AdapterView.java:931)
         at android.widget.AdapterView.dispatchOnItemSelected(AdapterView.java:920)
         at android.widget.AdapterView.access$300(AdapterView.java:55)
         at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:890)
         at android.os.Handler.handleCallback(Handler.java:743)
         at android.os.Handler.dispatchMessage(Handler.java:95)
         at android.os.Looper.loop(Looper.java:150)
         at android.app.ActivityThread.main(ActivityThread.java:5621)
         at java.lang.reflect.Method.invoke(Native Method)
         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:684)

我做错了什么？我无法弄清楚......

注意：

我注意到只有当触发notifydatasetchanged的项目滚动了一半（或更多）时才会发生崩溃..这可能有帮助

Note_2

我还注意到，如果我调试代码，应用程序不会崩溃。如果我不调试，它会随机崩溃。

个人考虑

我尝试调试并更改了很多东西，但问题仍然存在。使其变为appen的最佳方法是更改更新源的项目，然后歇斯底里地向上和向下滑动列表。这将导致每6-7次尝试一次错误..

RecyclerView notifydatasetchanged导致崩溃

更新 - 07/03/2018

注意：

Note_2

个人考虑

0 个答案: