Question

我有一个带有2个ViewTypes的recyclerView：图像和1个按钮。当我点击该按钮时，我每次都可以再添加一个图像。我希望当我有5张图像时，按钮会消失，而不使用setView（Gone）。这是我的适配器，我正在尝试删除onBindViewHolder中的按钮：

public class SelectPhotoAdapter  extends
        RecyclerView.Adapter<SelectPhotoHolder> {// Recyclerview will extend to
    // recyclerview adapter
    private ArrayList<Data_Model> arrayList;
    private Context context;

    private boolean hasLoadButton = true;
    private final int IMAGES = 0;
    private final int LOAD_MORE = 1;

    public SelectPhotoAdapter (Context context,
                                ArrayList<Data_Model> arrayList) {
        this.context = context;
        this.arrayList = arrayList;

    }


    public boolean itHasLoadButton() {
        return hasLoadButton;
    }

    public void setHasLoadButton(boolean hasLoadButton) {
        this.hasLoadButton = hasLoadButton;
        notifyDataSetChanged();
    }


    @Override
    public int getItemCount() {
        if (hasLoadButton) {
            return arrayList==null? 1 :arrayList.size() + 1;
        } else {
            return arrayList==null? 0 :arrayList.size();
        }
    }

    @Override
    public int getItemViewType(int position) {
        if (position < getItemCount()-1) {
            return IMAGES;
        } else {
            return LOAD_MORE;
        }
    }

    @Override
    public void onBindViewHolder(SelectPhotoHolder holder, int position) {
        SelectPhotoHolder mainHolder = holder;// holder

        if(position >= getItemCount() -1) {
                mainHolder.addPhoto.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View view) {
                        arrayList.add(new Data_Model(SelectPhotoDialogFragment.IMAGES[0]));
                        SelectPhotoDialogFragment.adapter.notifyItemInserted(arrayList.size());
                        SelectPhotoDialogFragment.mRecyclerView.scrollToPosition(arrayList.size());
                        Log.d("askj","Sizee: "+arrayList.size());
                        if(arrayList.size()>5&&itHasLoadButton()){
                            setHasLoadButton(false);
                            SelectPhotoDialogFragment.adapter.notifyItemRemoved(arrayList.size() + 1);
                            SelectPhotoDialogFragment.adapter.notifyItemRangeChanged(arrayList.size() + 1, getItemCount());
                            Log.e("askj", "calledLoad");
                        }
                    }
                });
        } else {
            final Data_Model model = arrayList.get(position);
            Bitmap image = BitmapFactory.decodeResource(context.getResources(),
                    model.getImagePath());// This will convert drawbale image into
            mainHolder.imageview.setImageBitmap(image);
        }

    }




    @Override
    public SelectPhotoHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if(viewType == IMAGES) {

            return new SelectPhotoHolder((LayoutInflater.from(parent.getContext()).inflate(R.layout.selectphotolist, parent, false)),IMAGES);

        } else if (viewType == LOAD_MORE) {
            return new SelectPhotoHolder((LayoutInflater.from(parent.getContext()).inflate(R.layout.addphoto, parent, false)),LOAD_MORE);

        } else {
            return null;
        }
    }
}

调用该方法（我可以在控制台'calledLoad'中看到），但按钮仍在那里。我认为通过调用setHasLoadButton（false）按钮将会消失，但它不会发生。

如果我需要添加更多代码，请告诉我。

Answer 1

您可以将getItemViewType中的条件从position < getItemCount()-1更改为arrayList!=null && position < arrayList.size()。

最好还将OnClickListener界面的管理直接转移到ViewHolder。

不删除RecyclerView中的AddMore按钮

1 个答案: