Приложение галереи IndexOutOfBoundsException с использованием базы данных Firebase - PullRequest
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Приложение галереи IndexOutOfBoundsException с использованием базы данных Firebase

0 голосов
/ 08 ноября 2018

, поэтому я занят созданием приложения, в котором есть система галерей, которая загружает изображения из Firebase. Я начал индекс моего массива с 0. Пожалуйста, смотрите комментарии для дальнейшего объяснения, почему происходит эта ошибка.

Структура базы данных Firebase: Провинция> Идентификатор события> Галерея> Номер рисунка> URL рисунка

Код для извлечения данных: 

private void loadEventGalleryFromDB(final String eventName){
    DatabaseReference userEventsGFound = Constants.eventsRef.child(eventProvSelected);
    userEventsGFound.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if (dataSnapshot.exists()) {
                for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                    eventIDFound = String.valueOf(snapshot.getKey());
                    if(!eventIDFound.equals("Total Events")){
                        eventNameFound = String.valueOf(snapshot
                                .child("Festival Name")
                                .getValue());
                        if(eventNameFound.equals(eventName)){
                            DatabaseReference userEventGalleryFound = Constants.eventsRef
                                    .child(eventProvSelected)
                                    .child(eventIDFound)
                                    .child("Gallery")
                                    .child("2018");
                            userEventGalleryFound.addListenerForSingleValueEvent(new ValueEventListener() {
                                @Override
                                public void onDataChange(DataSnapshot dataSnapshot) {
                                    if (dataSnapshot.exists()) {
                                        dbSize = (int) dataSnapshot.getChildrenCount();
                                        Toast.makeText(ScreenUserViewEvent.this, "dbSize: " + dbSize, Toast.LENGTH_SHORT).show();
                                        for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                                            eventGalleryItem = String.valueOf(snapshot.getKey());
                                            eventGalleryItemPic = String.valueOf(snapshot.getValue());
                                            if(galleryCount == 0 && tempSize < dbSize){
                                                arrayListEventGalleryPic1.add(eventGalleryItemPic);
                                                arrayListEventGalleryItem.add(eventGalleryItem);
                                                Toast.makeText(ScreenUserViewEvent.this, "tempSize: " + tempSize, Toast.LENGTH_SHORT).show();
                                                tempSize++;
                                            }else if(galleryCount == 1 && tempSize < dbSize){
                                                arrayListEventGalleryPic2.add(eventGalleryItemPic);
                                                arrayListEventGalleryItem.add(eventGalleryItem);
                                                Toast.makeText(ScreenUserViewEvent.this, "tempSize: " + tempSize, Toast.LENGTH_SHORT).show();
                                                tempSize++;
                                            }else if(galleryCount == 2 && tempSize < dbSize){
                                                arrayListEventGalleryPic3.add(eventGalleryItemPic);
                                                arrayListEventGalleryItem.add(eventGalleryItem);
                                                Toast.makeText(ScreenUserViewEvent.this, "tempSize: " + tempSize, Toast.LENGTH_SHORT).show();
                                                tempSize++;
                                                galleryCount = -1;
                                            }
                                            galleryCount++;
                                        }
                                        recyclerViewEventGallery.setVisibility(View.VISIBLE);
                                        txtNoEventGallery.setVisibility(View.GONE);

                                        initRecyclerEventGallery();
                                    }
                                }
                                @Override
                                public void onCancelled(DatabaseError databaseError) {}
                            });
                        }
                    }
                }
            }else{
                txtNoEventGallery.setVisibility(View.VISIBLE);
                recyclerViewEventGallery.setVisibility(View.GONE);
            }
        }
        @Override
        public void onCancelled(DatabaseError databaseError) {}
    });
}

Код в initRecyclerEventGallery (): 

private void initRecyclerEventGallery(){
    layoutManagerUserEventGallery = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL,false);
    recyclerViewEventGallery.setLayoutManager(layoutManagerUserEventGallery);
    adapterUserEventGallery = new AdapterRecycleUserEventGallery(arrayListEventGalleryItem,
            arrayListEventGalleryPic1,
            arrayListEventGalleryPic2,
            arrayListEventGalleryPic3,
            this);
    recyclerViewEventGallery.setAdapter(adapterUserEventGallery);
}

Код в AdapterRecycleUserEventGallery: 

public class AdapterRecycleUserEventGallery extends RecyclerView.Adapter<AdapterRecycleUserEventGallery.ViewHolder>{
private ArrayList<String> arrayListEventGalleryItemName;
private ArrayList<String> arrayListEventOptionsPic1;
private ArrayList<String> arrayListEventOptionsPic2;
private ArrayList<String> arrayListEventOptionsPic3;

private Context mContext;

String sEventOpt;

public AdapterRecycleUserEventGallery(ArrayList<String> arrayListEventGalleryItemName,
                                      ArrayList<String> arrayListEventOptionsPic1,
                                      ArrayList<String> arrayListEventOptionsPic2,
                                      ArrayList<String> arrayListEventOptionsPic3,
                                      Context mContext) {
    this.arrayListEventGalleryItemName = arrayListEventGalleryItemName;
    this.arrayListEventOptionsPic1 = arrayListEventOptionsPic1;
    this.arrayListEventOptionsPic2 = arrayListEventOptionsPic2;
    this.arrayListEventOptionsPic3 = arrayListEventOptionsPic3;

    this.mContext = mContext;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_layout_event_gallery, parent, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    Glide.with(mContext).asBitmap().load(arrayListEventOptionsPic1.get(position)).into(holder.image1);
    Glide.with(mContext).asBitmap().load(arrayListEventOptionsPic2.get(position)).into(holder.image2);
    Glide.with(mContext).asBitmap().load(arrayListEventOptionsPic3.get(position)).into(holder.image3);
}

@Override
public int getItemCount() {
    return arrayListEventGalleryItemName.size();
}

public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

    CircleImageView image1, image2, image3;

    public ViewHolder(View itemView) {
        super(itemView);
        image1 = itemView.findViewById(R.id.imageViewUserEventItem1);
        image2 = itemView.findViewById(R.id.imageViewUserEventItem2);
        image3 = itemView.findViewById(R.id.imageViewUserEventItem3);

        image1.setOnClickListener(this);
        image2.setOnClickListener(this);
        image3.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        /*sEventOpt = arrayListEventOptions.get(getLayoutPosition());

        Intent intent = new Intent("user-event-opt-selected");
        intent.putExtra("userSelectedEventOpt", sEventOpt);

        LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent);*/

    }
}

}

Код ошибки, который я получаю: 

E/AndroidRuntime: FATAL EXCEPTION: main
Process: evolutionaryapps.festivals4u, PID: 10487
java.lang.IndexOutOfBoundsException: Index: 7, Size: 7
    at java.util.ArrayList.get(ArrayList.java:437)
    at evolutionaryapps.festivals4u.Adapters.AdapterUser.AdapterRecycleUserEventGallery.onBindViewHolder(AdapterRecycleUserEventGallery.java:54)
    at evolutionaryapps.festivals4u.Adapters.AdapterUser.AdapterRecycleUserEventGallery.onBindViewHolder(AdapterRecycleUserEventGallery.java:20)
    at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6673)
    at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6714)
    at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5647)
    at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5913)
    at android.support.v7.widget.GapWorker.prefetchPositionWithDeadline(GapWorker.java:285)
    at android.support.v7.widget.GapWorker.flushTaskWithDeadline(GapWorker.java:342)
    at android.support.v7.widget.GapWorker.flushTasksWithDeadline(GapWorker.java:358)
    at android.support.v7.widget.GapWorker.prefetch(GapWorker.java:365)
    at android.support.v7.widget.GapWorker.run(GapWorker.java:396)
    at android.os.Handler.handleCallback(Handler.java:789)
    at android.os.Handler.dispatchMessage(Handler.java:98)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6938)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

1 Ответ

0 голосов
/ 12 ноября 2018

Итак, я понял это, внеся следующие изменения кода:

В моем классе Адаптер: 

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    if(position > (arrayListEventGalleryItemName.size()/3)){
        holder.image1.setVisibility(View.GONE);
    }else{
        Glide.with(mContext).asBitmap().load(arrayListEventOptionsPic1.get(position)).into(holder.image1);
    }
    if(position > (arrayListEventGalleryItemName.size()/3)){
        holder.image2.setVisibility(View.GONE);
    }else{
        Glide.with(mContext).asBitmap().load(arrayListEventOptionsPic2.get(position)).into(holder.image2);
    }
    if(position > (arrayListEventGalleryItemName.size()/3)){
        holder.image3.setVisibility(View.GONE);
    }else{
        Glide.with(mContext).asBitmap().load(arrayListEventOptionsPic3.get(position)).into(holder.image3);
    }
}
...