How to use AutoCompleteTextView with RecyclerView.Adapter but not with ArrayAdapter in android

问题

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?

回答1:

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;
    }
}

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

来源：https://stackoverflow.com/questions/33711398/how-to-use-autocompletetextview-with-recyclerview-adapter-but-not-with-arrayadap

标签

android-recyclerview

autocompletetextview