111 lines
2.9 KiB
Java
111 lines
2.9 KiB
Java
/*
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This file is part of Subsonic.
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Subsonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Subsonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2010 (C) Sindre Mehus
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*/
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package org.moire.ultrasonic.view;
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import android.content.Context;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.ArrayAdapter;
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import android.widget.SectionIndexer;
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import android.widget.TextView;
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import org.moire.ultrasonic.R;
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import org.moire.ultrasonic.domain.Genre;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.LinkedHashSet;
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import java.util.List;
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/**
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* @author Sindre Mehus
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*/
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public class GenreAdapter extends ArrayAdapter<Genre> implements SectionIndexer
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{
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private final LayoutInflater layoutInflater;
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// Both arrays are indexed by section ID.
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private final Object[] sections;
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private final Integer[] positions;
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public GenreAdapter(Context context, List<Genre> genres)
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{
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super(context, R.layout.artist_list_item, genres);
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layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
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Collection<String> sectionSet = new LinkedHashSet<String>(30);
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List<Integer> positionList = new ArrayList<Integer>(30);
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for (int i = 0; i < genres.size(); i++)
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{
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Genre genre = genres.get(i);
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String index = genre.getIndex();
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if (!sectionSet.contains(index))
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{
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sectionSet.add(index);
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positionList.add(i);
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}
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}
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sections = sectionSet.toArray(new Object[sectionSet.size()]);
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positions = positionList.toArray(new Integer[positionList.size()]);
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}
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@NonNull
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@Override
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public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
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View rowView = convertView;
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if (rowView == null) {
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rowView = layoutInflater.inflate(R.layout.artist_list_item, parent, false);
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}
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((TextView) rowView).setText(getItem(position).getName());
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return rowView;
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}
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@Override
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public Object[] getSections()
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{
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return sections;
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}
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@Override
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public int getPositionForSection(int section)
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{
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return positions[section];
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}
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@Override
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public int getSectionForPosition(int pos)
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{
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for (int i = 0; i < sections.length - 1; i++)
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{
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if (pos < positions[i + 1])
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{
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return i;
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}
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}
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return sections.length - 1;
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}
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}
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