java - 如何在 recyclerView 的适配器中调用 scrollToPosition(position)？

Question

我的 onBindViewHolder 中有一个 setOnClick 监听器

@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
       ((ViewHolder) holder).txtType.setText(object.text);
       ((ViewHolder) holder).checkBox.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) { 
                        Toast.makeText(mContext, ""+position, Toast.LENGTH_SHORT).show();                           
                      //???.scrolltoPosition(position+1);
                    }
                });

单击时，我会将视口(viewport)滚动到下一个回收器 View 项目。我通过 recyclerView.scrollToPosition(position); 在我的 MainActivity java 中完成了这个。但是在 onBindViewHolder 上的适配器类中，我不知道如何在主 Java 类上调用我的 recyclerView。

我应该怎么做？

编辑:出于简化目的，我修改了之前的代码，因为我为我的回收器使用了多 View 适配器。这是多 View 适配器:

public class MultiViewTypeAdapter extends RecyclerView.Adapter {

private ArrayList<InstructionModel>dataSet;
Context mContext;
int total_types;
private LinearLayoutManager manager;

public MultiViewTypeAdapter(LinearLayoutManager manager)
{
    this.manager=manager;
}


public static class SimpleTextViewHolder extends RecyclerView.ViewHolder {

    TextView txtType;
    CardView cardView;
    CheckBox checkBox;

    public SimpleTextViewHolder(View itemView) {
        super(itemView);

        this.txtType = (TextView) itemView.findViewById(R.id.type);
        this.cardView = (CardView) itemView.findViewById(R.id.card_view);
        this.checkBox = (CheckBox) itemView.findViewById(R.id.checkBox);

    }
}
public static class TimeTextViewHolder extends RecyclerView.ViewHolder {

    TextView txtType;
    CardView cardView;
    CheckBox checkBox;

    public TimeTextViewHolder(View itemView) {
        super(itemView);

        this.txtType = (TextView) itemView.findViewById(R.id.type);
        this.cardView = (CardView) itemView.findViewById(R.id.card_view);
        this.checkBox = (CheckBox) itemView.findViewById(R.id.checkBox);
    }
}




public MultiViewTypeAdapter(ArrayList<InstructionModel> data, Context context) {
    this.dataSet = data;
    this.mContext = context;
    total_types = dataSet.size();
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View view;
    switch (viewType) {
        case InstructionModel.SIMPLE_TYPE:
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.simple, parent, false);
            return new SimpleTextViewHolder(view);
        case InstructionModel.TIME_TYPE:
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.time, parent, false);
            return new TimeTextViewHolder(view);
    }
    return null;
}

@Override
public int getItemViewType(int position) {

    switch (dataSet.get(position).type) {
        case 0:
            return InstructionModel.SIMPLE_TYPE;
        case 1:
            return InstructionModel.TIME_TYPE;
        default:    return -1;
    }
}

@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int listPosition) {

    InstructionModel object = dataSet.get(listPosition);
    if (object != null) {
        switch (object.type) {

            case InstructionModel.SIMPLE_TYPE:

                ((SimpleTextViewHolder) holder).txtType.setText(object.text);
                break;
            case InstructionModel.TIME_TYPE:
                ((TimeTextViewHolder) holder).txtType.setText(object.text);

                break;
        }
    }



}

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

附言如果你看到一些随机无用的东西，我正在尝试一些东西。

Answer 1

使用构造函数传递 LayoutManager

 class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder> {
            private LinearLayoutManager manager;

            public Adapter(LinearLayoutManager manager)
            {
                this.manager=manager;
            }


        @Override
        public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
           ((ViewHolder) holder).txtType.setText(object.text);
           ((ViewHolder) holder).checkBox.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) { 
                            Toast.makeText(mContext, ""+position, Toast.LENGTH_SHORT).show();                           
                          manager.scrollToPosition(position+1);
                        }
                    });
    }