src/com/android/car/dialer/ContactResultsAdapter.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.car.dialer;

import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract.Contacts;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.List;

import androidx.car.widget.PagedListView;

/**
 *  An adapter that will parse a list of contacts given by a {@link Cursor} that display the
 *  results as a list.
 */
public class ContactResultsAdapter extends RecyclerView.Adapter<ContactResultViewHolder>
        implements PagedListView.ItemCap {
    private final List<ContactResultViewHolder.ContactDetails> mContacts = new ArrayList<>();

    /**
     * Clears all contact results from this adapter.
     */
    public void clear() {
        mContacts.clear();
        notifyDataSetChanged();
    }

    /**
     * Sets the list of contacts that should be displayed. The given {@link Cursor} can be safely
     * closed after this call.
     */
    public void setData(Cursor data) {
        mContacts.clear();

        while (data.moveToNext()) {
            int idColIdx = data.getColumnIndex(Contacts._ID);
            int lookupColIdx = data.getColumnIndex(Contacts.LOOKUP_KEY);
            int nameColIdx = data.getColumnIndex(Contacts.DISPLAY_NAME);
            int photoUriColIdx = data.getColumnIndex(Contacts.PHOTO_URI);

            Uri lookupUri = Contacts.getLookupUri(
                    data.getLong(idColIdx), data.getString(lookupColIdx));

            mContacts.add(new ContactResultViewHolder.ContactDetails(
                    data.getString(nameColIdx),
                    data.getString(photoUriColIdx),
                    lookupUri));
        }

        notifyDataSetChanged();
    }

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

    @Override
    public void onBindViewHolder(ContactResultViewHolder holder, int position) {
        holder.bind(mContacts.get(position), getItemCount());
    }

    @Override
    public int getItemViewType(int position) {
        // Only one type of view is created, so no need for an individualized view type.
        return 0;
    }

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

    @Override
    public void setMaxItems(int max) {
        // No-op. A PagedListView needs the ItemCap interface to be implemented. However, the
        // list of contacts not be limited.
    }
}