如何在Android中将AutoCompleteTextView与RecyclerView.Adapter一起使用而不与ArrayAdapter一起使用 [英] How to use AutoCompleteTextView with RecyclerView.Adapter but not with ArrayAdapter in android

问题描述

我有一个条件，需要执行自动建议.为此，我一直在尝试使用自定义的RecyclerView.Adapter.但是问题是，AutoCompleteTextView似乎是为BaseAdapter及其子类制作的. 因此，不接受适配器.还有其他方法，我可以将RecyclerView适配器与AutoCompleteTextView一起使用.是AutCompleteTextView的ArrayListAdapter或BaseAdapter唯一解决方案吗?

I have a condition where auto suggest need to be implemented. For that purpose, I have been trying to use the custom RecyclerView.Adapter.But the problem is,AutoCompleteTextView seems to be made for BaseAdapter and its child class.

Therefore, the adapter is not accepted. Is there other way, I could use RecyclerView adapter with AutoCompleteTextView. Is the ArrayListAdapter or the BaseAdapter only solution for AutCompleteTextView?

推荐答案

AutoCompleteTextView要求的ListAdapter也是Filterable.您可以通过在RecyclerView.Adapter周围有一个包装类来实现此目的，该包装类扩展了BaseAdapter并将委托委派给基础RecyclerView.Adapter.这是一个示例:

AutoCompleteTextView requires a ListAdapter that is also Filterable. You can implement this by having a wrapper class around a RecyclerView.Adapter that extends BaseAdapter and delegates calls to the underlying RecyclerView.Adapter. Here's an example:

public class RecyclerBaseAdapter<VH extends RecyclerView.ViewHolder> 
    extends BaseAdapter implements Filterable {

    private final RecyclerView.Adapter<VH> mAdapter;

    public RecyclerBaseAdapter(RecyclerView.Adapter<VH> adapter) {
        mAdapter = adapter;
    }

    @Override
    public int getItemViewType(int position) {
        return mAdapter.getItemViewType(position);
    }

    @Override
    public int getCount() {
        return mAdapter.getItemCount();
    }

    @Override
    public Object getItem(int position) {
        // not supported
        return null;
    }

    @Override
    public long getItemId(int position) {
        return mAdapter.getItemId(position);
    }

    @SuppressWarnings("unchecked")
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        VH holder;
        if (convertView == null) {
            holder = mAdapter.createViewHolder(parent, getItemViewType(position));
            convertView = holder.itemView;
            convertView.setTag(holder);
        } else {
            holder = (VH) convertView.getTag();
        }
        mAdapter.bindViewHolder(holder, position);
        return holder.itemView;
    }

    @Override
    public Filter getFilter() {
        // TODO: return a real filter
        return null;
    }
}

现在您可以执行mAutoCompleteTextView.setAdapter(new RecyclerBaseAdapter(mRecyclerViewAdapter)).我只在Spinner上对此进行了测试，但是它也可以适用于您的情况.

Now you can do mAutoCompleteTextView.setAdapter(new RecyclerBaseAdapter(mRecyclerViewAdapter)). I only tested this on a Spinner, but it should also work for your case.

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